interfase festo

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FEC

Manual

GB


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FEC Hardware Description V1.7 0198 Page 1

Festo

E.FEC-20-DCand

E.FEC-20-AC


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Description: FEC Hardware DescriptionEdition: V1.7 01/ 98Author: R.Mller, Fa. Beck ; P.Janssen YC-EPMEditor: S.Baerwald, YC-ECI

Copyright 1997 Festo AG & Co, 73726 Esslingen, Germany

All rights reserverd, including translation rights. No part of this documentation may bereproduced by any means (printing, copying, microfilming or any other process) withoutthe written consent of Festo AG & Co.


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Contents

FOREWORD................................................................................................. 7

IMPROVED COST EFFECTIVENESS....................................................................................................7

ABOUT THIS MANUAL.....................................................................................................................8

CE CONFIRMATION........................................................................................................................9

GUIDELINES FOR USER SAFETY AND PROTECTION OF THE FESTO FEC..........................................10

WARNINGS:..................................................................................................................................11THE LAYOUT OF THE FEC............................................................................................................12

DIFFERENCES BETWEEN FESTO FEC-20-DC AND FESTO FEC-20-AC .........................................13

INSTALLATION AND WIRING.............................................................. 14

DURING MOUNTING......................................................................................................................15

OUTSIDE DIMENSIONS ..................................................................................................................16

DURING WIRING ...........................................................................................................................17

THE PIN ALLOCATION OF THE CONNECTING CABLE (FEC TO PC) .................................................18


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POWER / SENSOR SUPPLY CIRCUIT CONNECTION E.FEC-20-DC..................................................19

POWER / SENSOR SUPPLY CIRCUIT CONNECTION E.FEC-20-DC..................................................20

INPUTS .........................................................................................................................................21INPUT SPECIFICATIONS AND CIRCUIT CONNECTION .......................................................................22

ANALOG POTENTIOMETER............................................................................................................27

OUTPUTS......................................................................................................................................28

IMPORTANT ..................................................................................................................................29

OUTPUT SPECIFICATIONS..............................................................................................................31

LIFE OF RELAY OUTPUT CONTACTS ..............................................................................................32

PRELIMINARY TESTS AND MAINTENANCE....................................................................................33

WRITING AND CHECKING A PROGRAM ..........................................................................................34

OPERATION AND TESTING ............................................................................................................35

PERIODIC INSPECTION ..................................................................................................................36

ENVIRONMENTAL CONDITIONS.....................................................................................................37

MOUNTING ..................................................................................................................................38

TROUBLE SHOOTING AND ERROR CHECKING............................. 39

POWER INDICATION......................................................................................................................39


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RUN INDICATION.........................................................................................................................40

INPUT INDICATION.......................................................................................................................41

OUTPUT INDICATION ...................................................................................................................41ERROR INDICATION ......................................................................................................................42

ERROR WORD...............................................................................................................................42

LIST OF SYSTEM GENERATED ERROR NUMBERS ............................................................................43

STATEMENT LIST (STL) AND LADDER DIAGRAM (LAD) PROGRAMMING ....................................44

OPERANDS ...................................................................................................................................45

FLOWCHARTS...............................................................................................................................47

TECHNICAL DATA .................................................................................. 55

HARD AND SOFTWARE FEATURES.................................................................................................55

ELECTRICAL FEATURES ................................................................................................................57

INPUTS .........................................................................................................................................58

OUTPUTS......................................................................................................................................59

APPENDIX A .............................................................................................. 61


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COMMAND INTERPRETER (CI)......................................................................................................61

ACCESSING THE COMMAND INTERPRETER (CI).............................................................................62

COMMANDS .................................................................................................................................64PARAMETERS ...............................................................................................................................65

CI EXAMPLE ................................................................................................................................67

APPENDIX B .............................................................................................. 68

EXPANSION OF THE FEC TO 40 I/OS ............................................................................................68


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Foreword

The FEC is designed as a low cost versatile industrial control system that can be

quickly and easily installed and operated by persons with little experience with

programmable controllers.

Improved cost effectiveness

All functions for a small scale control system are integrated in a single housing.

The FEC can be used in the place of conventional relay control panels and is ideally

suited for the economical control of manufacturing and other applications with require

small numbers of input and output control points.


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About this manual

This manual contains text, diagrams and explanations which will guide the reader in the

correct installation, safe use and operation of the Festo FEC and should be read and

understood before attempting to install or use the unit.

If in doubt at any stage during the installation of the Festo FEC please consult a

qualified electrical engineer who is also familiar with Iocal safety and wiring standards.

lf in doubt about the operation or use of the Festo FEC please consult your nearestFesto office.

This manual is subject to change without notice.


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CE Confirmation

The manufacturer declares in sole responsibility that the product

FEC-20-DCFEC-20-AC

is in accordance with the directive 89/336/EWG in harmonisation with the followingstandards:

noise immunity EN 50082-2emitted interference EN 50081-2

This is a class A device. It can cause transmission interferences in residential areas. Inthis case it is the responsibility of the user to take appropriate measures and bear anycosts incurred in stemming such interferences.


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Guidelines for user safety and protection of the Festo FEC

This manual has been written to be used by trained and competent personnel for theinstallation of the Festo FEC product. Safety guidelines are defined by the Europeandirectives for machinery, low voltage and EMC. Throughout this manual, symbols areused to highlight information relating to the user's personal safety, and protection of theequipment's integrity. When any of these symbols are encountered, its associated noteshould be read and understood.


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Warnings:

1) The identified danger will cause physical or property damage.

2) The identified danger could possibly cause physical or propertydamage.

3) Point of further interest or further explanation.


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The Layout of the FEC

1 Sensor supply 24 V DC / 100 mA2 Input terminal3 RUN/STOP switch4 Analog timer5 Power LED6 Run/error LED

7 Communication interface8 Extension interface9 Output terminal10 Power supply terminal

1

2 34

5

6

78

9

10


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Differences between Festo FEC-20-DC and Festo FEC-20-AC

Type Power supply voltage Max permissiblevoltage drop out time

Powerconsumption

E.FEC-20-DC 24V DC(+20% / -15%)

5 msec 10 W

E.FEC-20-AC 120 - 230 V AC(+10% / -15%)

10 msec 15 VA


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INSTALLATION AND WIRING

When installing the FEC, please pay attention to the environmental conditions underwhich the unit will normally operate.

Do not install the PLC:

in areas subject to excessive dust, oily mist, conductive dust, or corrosivegas.

directly in areas subject to shock or vibration.

in areas subject to high temperature, direct sun light, moisture, or rain.

near high voltage equipment or wiring.


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The unit can be mounted on a DIN rail (DlN46277, width: 35 mm/1.38 in) or directly byusing M4 screws. (Refer to the following diagram for outside dimensions and mounting

hole centres.)

During mounting

Be sure to mount the unit as far as possible from high-voltage equipment andlarge power equipment.

Do not allow wire cuttings, fillings or shavings to fall into the unit when drilling holes orconnecting cables.

Avoid mounting the PLC directly above any heat-generating source, such as a heater,transformer or high wattage resistor.

If the ambient temperature is above 55oC within the cabinet you must install a fan for

forced air ventilation.


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Outside dimensions

0

0

1

1

02

2

13

3 4 5 6 7

24 35 6 7

OUT

S1S0IN

RUN

POWER

SENSOR

SUPPLY

POWER

4 5 60 1 2 3 7 1210 11 13

24V 0V

24V 0V

C0 C1 C20 1 2 3 4 5 6 7 FEC20-DC

RUN STOP

EXT. COM

130,0

53,

0

122,5

4,

0

80,

0

60,0


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During wiring

Separate signal input and output wiring in separate ducting and avoid bundlingthe signals together.

Do not use the same multi core cable for signal input and output wiring


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The pin allocation of the connecting cable (FEC to PC)

15

6

9

1

4

1

234

1

23456789

E.KFEC-PC150


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Power / Sensor supply circuit connection E.FEC-20-DC

0

0

1

1

02

2

13

3 4 5 6 7

24 35 6 7

OUT

S1S0IN

RUN

POWER

SENSORSUPPLY

POWER

4 5 60 1 2 3 7 1210 11 13

24V 0V

24V 0V

C0 C1 C20 1 2 3 4 5 6 7 FEC20-DC

RUN STOP

EXT. COM

Sensor supply +24 V Sensor supply 0 V

Power supply

24 V DC

Power supply0 V

Power supply


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Power / Sensor supply circuit connection E.FEC-20-DC

0

0

1

1

02

2

13

3 4 5 6 7

24 35 6 7

OUT

S1S0IN

RUN

POWER

SENSORSUPPLY

POWER

4 5 60 1 2 3 7 1210 11 13

L N

24V 0V

C0 C1 C20 1 2 3 4 5 6 7 FEC20-AC

RUN STOP

EXT. COM

Sensor supply +24 V Sensor supply 0 V

Power supply

L

Power supplyN

Power supply


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Inputs

12-PNP or -NPN inputs (automatic detection) first group 8 inputs, second group 4inputs

The last two inputs of the second group can also be used as counters with amaximum counting frequency of 4 kHz (via sw module).

Galvanic isolation (optoelectronic coupler)

Delay time 5 msec

Signal indication through LEDs (after galvanic isolation).

Connection via 14-pin screw type terminal. (each terminal accommodates 2 x

0.75mm2

wires)


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Input specifications and circuit connection

Specifications

12 inputs NPN or PNP

Input voltage 24V DC Input current 7mA

Delay time 5 msec

Input sensitivityVoltage ON 15V DC min. Voltage OFF 5V DC max.

currentOFF / ON 4.5mA or more ON / OFF 1.4mA or less


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DC power supply type [+] common [source) connection

Class 3 ground(


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AC power supply type [+] common (source) connection

PNP type

Class 3 ground(


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DC power supply type [-] common (sink) connection

NPN type

Class 3 ground(


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AC power supply type [-] common (sink) connection

NPN type

Class 3 ground(


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Analog potentiometer

The FEC includes an analog potentiometer which can be easily adjusted with a screwdriver within a decimal value range of 1 ... 63. This value can be evaluated by the user'sapplication program as the current setting of the potentiometer is stored within a logicalInput Word (IW).

This built-in feature provides an economical manner for performing tasks such as

"fine-tuning" operating parameters (e.g. timer values) or a variety of similar tasks.

This feature can be enabled / disabled by means of the FST software.


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Outputs

8 relay outputs 1- normally open contact per output in groups of 4/2/2.

Switching voltage max. 30 V DC or 250 V AC

switching current 2 A max.

contact rating see chapter " Life of relay output contacts " in this manual

Delay time 10 msec

Signal indication LED for every output

Connection 12-pin screw-type terminal, (each terminal accommodates

2x0,75 mm wires)


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Important

Do not connect to any of the unused terminals.

Since a fuse is not included in the output circuit of the programmable controller (PLC),

a 5 to 10 A fuse should be used for every group of 4 output points to prevent the PLC

output circuitry from being damaged due to a load short circuit, etc.

Connecting a surge absorbing diode in parallel to DC inductiveloads will greatly lengthen the service life of the relay contacts.

For loads such as forward/reverse motor contactors which may be dangerous if turned

on simultaneously, interlocks external from the PLC, as well as programmed interlocks,should be used to prevent such loads from simultaneous activation.


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For emergency stop functions, the output loads should be turned of using a

switch external to the PLC which isolates power from the output terminals.

When connecting an emergency stop circuit please ensure adherence to localwiring and safety regulations.

In the case of operation with inductive loads, the surge voltage suppression

circuits available from the various manufacturers should be used in order tosuppress electrical interference.

Connecting a surge suppressor in parallel to an AC inductive load will reduce electricalnoise generation.


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Output specifications

Specification

Rated current 2 A per output point

Load voltage 250 V AC30 V DC or less

Max. load 80 VA(inductive)100 W (lamp)

Response time Approx. 10 msec


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Life of relay output contacts

Specified service life of contactors or solenoid valves shown in the table below.

Current / load resistive load inductive load

no current 20.000.000 cycles

0.2 A 1.000.000 cyles 800.000 cycles

1 A 500.000 cycles 300.000 cycles

2 A 300.000 cycles 100.000 cycles


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Preliminary Tests and Maintenance

Power: OFF

Incorrect connection of the Power supply terminals, a short between the DC input lines

and the power supply cable, or a short in the output lines may seriously damage the

PLC. Before turning on the power, check the power supply and ground connections andthe input/output line connections.

If it is necessary to measure the PLC maximum withstand voltage and insulation

resistance, disconnect the input and output lines and the power supply cable from the

PLC, and perform the measurement tests across a common point of all the terminals

and the ground terminal.


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Writing and checking a program

Power: ON, PLC: STOP

Write a program by using a peripheral device such as a PC together with the Festosoftware package FSTIPC / FEC.

Check the program to make sure it has been written correctly. Syntax checking of

errors will be done automatically when you download the program(s) from theprogramming device into the FEC.

For testing of wiring or output devices, each output can be forced ON and OFF with the

programming device when the PLC is in STOP condition.

If the RUN/STOP switch is switched to RUN, then the previously loaded program

should have been completed. The RUN LED will change colour from yellow (or red) togreen.


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Operation and testing

Power: ON, PLC: STOP

The FEC is equipped with an internal RUN/STOP switch. As a further option, a so-called remote RUN/STOP switch can be used. This remote RUN/STOP switch is anexternal switch, assigned to one of the FEC's inputs. If this option is to be used, thenthis input must be defined as an additional RUN/STOP switch in the configuration.

When the RUN/STOP switch is set to STOP (also when remote RUN/STOP switch isused) the RUN LED lights YELLOW (or in case of error the RUN LED lights "RED").


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Power: ON PLC: RUN

When the RUN/STOP switch is set to RUN (when no remote RUN/STOP switch isused) the RUN LED lights GREEN and the PLC starts to execute. It is possible to

change the settings for timers, counters, data registers, flags or force devices ON or

OFF while the PLC is running. However, these values can be altered whilst the program

is being processed.

Regular inspection

Regular inspections and appropriate maintenance of the PLC are essential to ensure

the full service life of your PLC and trouble-free operation of your control system

This PLC is not equipped with any consumable or user serviceable parts which may

shorten the service life of the PLC. However it is necessary before operation to check

the service life of output relays if they are operated frequently or used to drive largecapacity loads. Please see table in the chapter Life of relay output contacts


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Also check the following points:

Environmental conditions

Ambient temperature in the control panel 0 to 55oC

Humidity 0 to 95 % Relative Humidity without condensation

Dust must be relatively dust-free


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Mounting

Caution:

Be sure that the power is OFF before replacing any cables or other activities

Ensure mounting screws are not loose.

Ensure terminal screws for external wiring are not loose.

Any external wiring must be free from visible damage.


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Trouble Shooting and Error checking

If a problem occurs while the PLC is running first check the power supply voltage, thePLC terminal screws and the input output devices for looseness or other abnormalities.As a second step check the LEDs on the PLC as described below.The LEDs will help you determine if the PLC is faulty or if the problem is being causedby an external reason.

Power indication

POWER LED

The power LED of the PLC panel is lit by the internal 5V power supply of the PLC.

If the LED is not lit when the power is turned on then disconnect the 24V Sensor-supplyterminal. If the POWER LED lights then this indicates that the sensor power load is too


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high. In this case the sensors must be powered by an external 24volt power supply.

The internal fuse in the FEC may blow if conductive foreign matter has entered the PLCor other fault conditions exist. If this is the case and changing the fuse does not solvethe problem, please contact your local FESTO office for further advice.

RUN indication

If the RUN LED does not light "GREEN when the RUN/STOP switch is set to RUNperform the checks in the section Error indication below.

If the RUN LED lights GREEN when the RUN/STOP switch is set to RUN but theprogram will not execute perform the following checks:Check your settings for remote RUN/STOP switch (Configuration in the programmingsoftware). It may be this run/stop input is set to "STOP".


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Error indication

RUN LED lights "RED"A program or internal error is indicated. The error number can read out via the CI(Command Interpreter test system of the FEC) of the FSTIPC / FEC software packageor the Service Device Unit. (option)

Error word

There is currently no automated recognition of the presence and service ability ofconnected inputs or outputs. In applications in which this can result in problemsappropriate measures must be taken (additional program with operational test, externalsignal detection, feedback of signals etc.). Additional appropriate error numbers can becreated from these in the user program.


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List of system generated error numbers

The following error numbers are currently generated by the PLC operating system:6 Program 0 not found on start7 Program not found9 Project could not be started11 I/O stage defective34 Arithmetic error (division by 0)

36 Illegal module call57 Project not found99 invalide remote access

An user error program can be written and configured to run if an error occurs. Thisprogram should not be activated during normal operation (For further information seedocumentation included with the FSTIPC / FEC software).

The configuration also allows setting an error output in the event of a system error. Ifthis is the case, then this output must also entered into the configuration.


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Operands

The FEC has the following operands that can be accessed via FST software or the CI.Input words IW0 to IW1 with I0.0 to I0.7, I1.0 to I1.3Output word OW0 with O0.0 to O0.7Error word EW, also as EInitial execution flag FI, per programFlag words FW0 to FW9999 with Fx.0 to Fx.15

Registers R0 to R255Function units FU0 to FU255, FU32 to FU38 per programTimers T0 to T255 (also TP and TW for every timer)

TON, TOFFCounters C0 to C255 (also as CP and CW for every

counter)Programs P0 to P63

Program status PS0 to PS63Function modules CFM0 to CFM99 (predefined by Festo)Program modules CMP0 to CMP99 (definable by user)


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Overview of retentive operands

Operand Operandnumber

Remarks

output word ( OW ) 0 ... 1

Register ( Rx) 0 ... 127

Timer preselect ( TP ) 0 ... 127

Counter ( Cx ) 0 ... 127

Counter preselect ( CP ) 0 ... 127

Counter word ( CW ) 0 ... 127

Flag word ( FW ) 0 ... 255


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Flowcharts

Start

Power

indicator lit ?Refer to "power

supply" flowchart

General flowchart

RUN indicator

lit ?

Refer to "failure"

flowchart

No

No

Yes

Yes

Yes

A


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I/O sequence

normal ?Refer to "I/O"

flowchart

Enviromental

conditions normal

?

Refer to "I/O"

flowchart

Replace FEC

General flowchart (cont.)

Ye s

No

No

Ye s

A


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Power indicator

"OFF"

"Power supply" flowchart

Power

suppliedSupply power

Power

indicator lit ?

Supply voltage in

rated rangePower supply in rated range

Power

indicator lit ?

BEnd

No

No

Yes

Yes

No

No

Yes

Yes


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Fuse blown ?Replace fuse

Power

indicator lit ?

Loose screws or

break wires ?Tighten loose screws etc.

Power

indicator lit ?

Disconnect 24V Sensor supply.

Power

indicator lit ?

B

Return to

"General flowchart"End

Sensor supply

connected ?

Yes

Yes

Yes

Yes

Yes

"Power supply" flowchart (cont.)

Yes

No

No

No

No


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RUN/STOP

switch to "RUN"

RUN indicator lits

"RED"

Read out the error no. with

the programming- or servicedevice

See FSTIPC error list

Check the program, find

and correct errors

download project again;

set RUN/STOP

switch to "RUN"

RUN indicator

lits "GREEN"

End

No

Yes

"Failure flowchart"


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Start

Output indicator

normal ?

Use "ONLINE Display" tomonitoring the program

Normal ?

Use tester to check

terminal voltage

Normal ?

Disconnect external

wirings check

continuity

C D

NO

YES

Use tester to checkterminal voltage

Normal ?

External powersupply ON ?

E

Turn ON ext.

PS.

Replace FEC

NO

YES

NO

YES

YES

NO

I/O flowchart

NO

YES


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C D E

Normal ?Replace FEC

Check output

device

NOYES

F


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Input indicator

x normal ?

F

Check terminal

voltage of input x

Use tester to check

terminal voltage

Replace FEC

Normal ?

Normal ?

Normal ?

Check input device

Disconnect ext. wirings

NO

YES

YES

NO

NO

YES

NOYES


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Technical data

Hard and software features

Processor . . AM186-(20 MHZ), (Intel 80186 compatible)Memory

Program memory (compiled) 256 kB 16 bit flash (Cycles of reading/writing

>100.000)Working memory . 256 kB 16 bit SRAM

Data storage . . 32 kB (retentive Data 2 kB in flash memory)

Program storage (source) 32 kB in flash memoryProgramming interface RS232 3-wire 9600 baud, opto isolated

(connection RJ11 mini)

The serial COM port is not according to the standard EIA-RS232-C.


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The FEC-COM interface is isolated by optocouplers and operates with signal levels of+/-5V to +/-15V. If communication problems are encountered, your service unit may

supply a lower signal level.

Expansion interface . Serial asynchronous TTL (connection RJ12)(4-wire max 115 kBaud )

Operational controls . Run/Stop switch

Operation indicator RUN LED " YELLOW " Stop status" GREEN " Run status

. " RED " Error status

Operating system . Runtime kernel FST-IPC / FEC

Programming software . FST-IPC / FEC


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Electrical features

Supply voltage . Festo FEC-20-DC: 24 V DC (+20 % /-15 %)

Festo FEC-20-AC: 120 V AC - 230 V AC

(+10% / -15%) 50-60 Hz

Fuse Festo FEC-20-DC: 1 x 315 mA (slow blowing)

Festo FEC-20-AC: 1 x 315 mA (slow blowing)

1 x 800 mA (slow blowing)

Power consumption. Festo FEC-20-DC: 10 WFesto FEC-20-AC: 15 VA

Sensor supply voltage . Festo FEC-20-DC: Same as Supply voltage

Festo FEC-20-AC: 24 V DC, 100 mA


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Inputs

12 PNP or NPN inputs (auto detection), 24 V DC, 7 mA,(in 2 groups 8/4)

2 inputs of the second group as 4kHz counter(via sw module)

Galvanic isolation optoelectronic couplerDelay time . . . . . 5 msec.

Signal indication . . . LED green (after galvanicisolation)

Connection . . . . . 14-pin screw-type terminal,each capable of 2 x 0.75 mm

2


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Protection class IP 20

Temperature rangeTransport and storage temperature -25 ..... + 70 grad CAmbient temperature 0 ... 55 grad C

HumidityRelative humidity (25

oC ) 0 ... 95% (max.)

non condensing


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Appendix A

Command Interpreter (CI)

The command interpreter is part of the FEC oerating system and represents the userlevel of it.

It is used for:

test, service, diagnostic and commissioning purposes.

for UP/DOWNLOAD of filesThe command interpreter (CI) offers checking functions for the complete controlsystem.In the case of programs and operands the user can:

start and stop programs

display individuell or all programs

display and modify operands


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Accessing the command interpreter (CI)

When an interactive device is connected to the FEC, the user must adopt the followingprocedure in the sequence shown in order to access the CI.

Apply the operating voltage to the FEC

Switch on the interactive device.

Access the CI:The interactive terminal should be set at the correct baud rate (default 9600 Bd). Thebaud rate is measured automatically after a BREAK signal or after POWER ON, if novalid baud rate is noted in the system memory.

Input format

CTRL T

The CI responds with: IPC Vm.n (m.n = no. of operating system)>_


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The CI can still accessed with CTRL T even when the controller indicates an error. This

error must, however, be eliminated before any further action.

Command structure:

A complete command always consists of a letter for the command identification, almostalways a parameter and somtimes a parameter value.Entry can be made either in upper or lower case letters and is concluded with .

Input format [ [parameter value]]

Deleting incorrect entries

Incorrect entries can be deleted with Backspace (CTRL H) before conclusion with

.


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Commands

Extract of the commands of the FEC command interpreter are listed below:

Command letter and command Explanation

D = DISPLAY = Display operands Displaycontents / status / operands

M = MODIFY = Modify operandsR = RUN = Start or continue Start program

S = STOP Stop program

X = EXIT Exit command interpreter


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Parameters

Different parameters must be entered depending on which operand a command is to beused.

Parameter Meaning Parameter value

A x.y Output 0.0 ... 0.7

AW x Output word 0

E x.y Input 0.0 ... 0.7; 1.0 ... 1.3

EW x Input word 0 ... 12... 255 for Trimmerand fast counter

F Error


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Parameter Meaning Parameter value

M x.y Flag 0.0 ... 9999.15MW x Flag word 0 ... 9999

P x Program 0 ... 63

PS x Program status 0 ... 63

R x Register 0 ... 255

T x Timer 0 ... 255

TV x Timer preselect 0 ... 255

TW x Timer word 0 ... 255

Z x Counter 0 ... 255

ZV x Counter preselect 0 ... 255ZW x Counter word 0 ... 255


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CI Example

DisplayDisplay the status of the single-bit operand output 0.6

DA0.6 CI response = 0 or 1

Display the status of the single-bit operand input 1.2DE1.2 CI response = 0 or 1

Display the status of timer 20DT20 CI response = 0 or 1

Display the status of flag 1000.15DM1000.15 CI response = 0 or 1

ModifyModify the contents of register 0 to 255

MR0 CI response = xxx : 255 xxx = old value ; 255 enter new value


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Appendix B

Expansion of the FEC to 40 I/Os

1. The RUN/STOP switch of the remote unit (the FEC20 without its own controlprogram) must always be set to STOP.

2. Ensure that the remote unit has no files with the names "PROJECT.RUN" or"STARTUP.BAT" in the directory on drive B (as supplied, the unit has no suchfiles).

Procedure for checking memory contents:

Start FSTIPC

Utilities > Program execution > Host IPC file transfer F1 : From IPC


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F7 : Enter IPC drive B Check whether "PROJECT.RUN" or "STARTUP.BAT" is present in the

directory If so, delete the two files using F1 Conclude with F8: Exit terminal program Switch the FEC20 off and back on.

3. Be sure that the system power supply is turned off before connecting ordisconnecting extension cables.

4. The power supply for the master/remote system must be from a single source witha common fuse protection. Do not use separate power supplies for the master andremote units.

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