samson - fieldbussamson 2010-11-25/v42/bgo · control in the field · 1 product overview pvlprocess...
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Single Control Loops with Control in the FieldSingle Control Loops with Control in the Field
FFIC C fFFIC ConferenceControl in Field
15th December, 2010I d t i l A t ti I di 2010Industrial Automation India 2010NSE Complex, GoregaonMumbai (India)Mumbai (India)
SamsonSamson
2010-11-25/V42/Bgo · Control in the Field · 1
Product overviewP V lProcess Valves
Control Valves
Positioner and Accessories
2010-11-25/V42/Bgo · Control in the Field · 2
Technology – Function block model
Resource Block
Technology Function block model
Resource Block Contains all characteristic data of the deviceE.g. manufacturer, software revision,… AO
Analog Output
PIDController
Transducer BlockBuilding up the connection to the hardware (sensor/actor → I/O function blocks)
Output ControllerMAI
MultipleAnalog Input
Function BlocksDescribe the function of a device
DO 1/2Digital Output
Interface to the fieldbusManufacturer decide which types of FB are implementedThe key for Control in the Field
DI 1/2Digital Input
MAOMultipleAnalog
ISInput
Selector
The key for Control in the Field Output
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Technology – Function block modelTechnology Function block model
MLManual Loader
AO
AIAnalog Input
PID
AIAnalog Input
PID
AIAnalog Input
PID
DIDiscrete Input
MAIMultiple
AI
InputAO
Analog Output
PIDControl
AOA l
PIDControl
AOA l
PIDControl
DODiscrete Output
AOAnalog Output
Cascade Control
Analog Output
Analog Output
PID Control Manual Control
Output
For example the FBs of SAMSON type 3730-5 positioner can be used for:
AO to travel a control valveDO to close/open an on/off valve or to start a Partial Stroke TestDI to read the discrete valve position or the condensed state (NE107)MAI to read the actual valve position or time for next auto started PST
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MAI to read the actual valve position or time for next auto-started PST
Technology - Link Active Scheduler (LAS)
The LAS is managing the devices and their
Technology Link Active Scheduler (LAS)
The LAS is managing the devices and theircommunication on the bus → Network administrator
Manages the “Li e List” of all attached de ices bManages the “Live List” of all attached devices by recognition of new devices and devices that have been removed or that are not longer communicating
Generates and manages the “Schedule” for the fixed and deterministic exchange of process data
Allocation of send rights (tokens) to devices for unscheduled data exchange
Time synchronization of field devices
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Technology – LAS Redundancyec o ogy S edu da cy
HSE (Hi h S d E h
Link Master devices (with LAS function)
Basic devices (without LAS Function)
HSE (High Speed Ethernet with up to 12 MBit/s) Several Link Master devices available in one
segment, only one can become the LAS
PLC /Link Master LAS
H1 Fieldbus (IEC 61158-2 with 31,25 kBit/s)T
Power Supply /Power Conditionerwith termination
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Basic DeviceBackup Link Master (LAS) Basic Device
Technology – LAS RedundancyTechnology LAS Redundancy
HSE (Hi h S d E h
Event of failure of the primary LAS
Backup LAS will take over HSE (High Speed Ethernet
with up to 12 MBit/s) Network traffic will resume uninterrupted
→ Increased reliability and availabilityPLC /
Link Master LAS
H1 Fieldbus (IEC 61158-2 with 31,25 kBit/s)T
Power Supply /Power Conditionerwith termination
Failure / lost communication
to controller
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Basic DevicesBackup Link Master (LAS)
Single loop control in DCS & in the field
Control in the field
Single loop control in DCS & in the field
Control in the field
Loop Control in DCS
Loop Control in pressure transmitter
Loop Control in positioner
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Single loop control in DCS & in the fieldS g e oop co t o CS & t e e d
Loop control in DCSLoop control in DCS
1. AO and AI are executedstart unscheduled communication
2. PID is communicating OUT to AO(values calculated in upstream cycle)
3. AI is communicating OUT to PID4 AO is communicating BKCAL OUT to PID4. AO is communicating BKCAL_OUT to PID5. Controller is executing PID
→ AO is moving into committed position in next cycle
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Single loop control in DCS & in the field
Loop control in e g pressure transmitter
S g e oop co t o CS & t e e d
Loop control in e.g. pressure transmitter
1. AI are executedStart unscheduled communication
2. PID is executed3. PID is communicating OUT to AO4. AO is executed and moving valve into committed position5 AO is communicating BKCAL OUT to PID5. AO is communicating BKCAL_OUT to PID
2010-11-25/V42/Bgo · Control in the Field · 10
Single loop control in DCS & in the field
Loop control in positioner
S g e oop co t o CS & t e e d
Loop control in positioner
1. AI are executedstart unscheduled communication
2. AI is communicating OUT to PID3. PID is executed4. AO is executed and moving valve into committed position
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Single loop control in DCS & in the field
Loop control in positioner
S g e oop co t o CS & t e e d
Loop control in positioner
Source: ARC White paper “The business value proposition of CIF”
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Single loop control in DCS & in the field
Summary:
S g e oop co t o CS & t e e d
Summary:
High flexibility for automation strategiesRelie ed b s comm nication ith CIFRelieved bus communication with CIFRelieved controller with CIFThe faster the execution time of the function blocks the faster the loop
Improved control performance by CIFFaster sample times Shorter latency (delays) in the read-execute-write cycleE g faster reaction to control disturbancesE.g. faster reaction to control disturbances
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Single loop control in DCS & in the field
Improved control performance by CIF e g faster reaction time
S g e oop co t o CS & t e e d
Improved control performance by CIF, e.g. faster reaction time
Source: ARC White paper “The business value proposition of CIF”
2010-11-25/V42/Bgo · Control in the Field · 14
SummarySu a y
CIF provides increased reliability and availability
CIF i bili d d h d d iCIF variability depends on the used devicesDevices with more function blocks offer more flexibility
Most of the single control loops can be realized in the fieldMost of the single control loops can be realized in the field
CIF can provide better control for fast process loops like pressure and flow loopsand flow loops
In terms of speed and ability to reject disturbances
Independent study of Industrial Systems and Control Ltd. (ICS)Independent study of Industrial Systems and Control Ltd. (ICS) “Control in the Field: Analysis of Performance Benefits”
2010-11-25/V42/Bgo · Control in the Field · 15
Thank You
for your attention!
2010-11-25/V42/Bgo · Control in the Field · 16
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