高液位 液位 变送器 低液位 - a.gongkong.coma.gongkong.com/tech/class/file/799.pdf ·...
TRANSCRIPT
Date: 2007-1-15File: SSP2_03C.1
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
模拟量处理
液位变送器
高液位
低液位
Date: 2007-1-15File: SSP2_03C.2
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
模拟量模块的用途
生产过程
物理量 标准的模拟信号
传感器 变送器
• 压力• 温度• 流量• 速度• pH 值• 粘性• 等
± 500mV± 1V± 5V± 10V± 20mA4...20mA等
DAC
PQW ...PQW ...:::PQW ...
模拟量输出模块
MR模块
ADC
结果存储器
PIW ...PIW ...:::PIW ...
模拟量输入模块 CPU
::::::L PIW 304
T PQW 320:
模拟执行器
物理量
......................................
Date: 2007-1-15File: SSP2_03C.3
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
量程卡
Date: 2007-1-15File: SSP2_03C.4
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
S7-300模拟量模块的寻址
IM 256to
270
336to
350
352to
366
368to
382
304to
318
320to
334
272to
286
288to
302(发送)
槽口号 2 3 4 5 6 7 8 9 10 11
384to
398
400to
414
432to
446
448to
462
464to
478
480to
494
496to
510
416to
430
机架 1
R0
电源模块
IM(接收)
电源模块 CPU
512to
526
528to
542
544to
558
560to
574
576to
590
592to
606
608to
622
624to
638
机架 2 IM(接收)
电源模块
机架 3 640to654
656to670
672to686
688to
702
704to
718
720to
734
736to
750
752to
766
IM(接收)
电源模块
Date: 2007-1-15File: SSP2_03C.5
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
模拟量模块SM335 (输入)
Date: 2007-1-15File: SSP2_03C.6
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
模拟模块SM335 (输出)
Date: 2007-1-15File: SSP2_03C.7
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
模拟输入模块 SM331
Date: 2007-1-15File: SSP2_03C.8
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
模拟量的表达方式和测量值的分辨率
20212223242526272829210211212213214VZ16进制.位值 十进制
0123456789101112131415位的序号 单位
位的分辨率+ 符号
1 11 ******** * * * * * * *15
* = 0 或 1
80 00000001128 ********8
40
20
10
8
4
000000
00000
0000
000
00
02
164
132
116
18
14
12
******** *
******** * *
******** * * *
******** * * * *
******** * * * * *
******** * * * * * *
9
10
11
12
13
14
Date: 2007-1-15File: SSP2_03C.9
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
在不同测量范围下模拟量的表达方式
范围
超上限
超上界
额定范围
超下界
超下限
测量范围± 10V
电压例如:
>= 11.759
11.7589:
10.0004
10.007.50:
-7.5-10.00
- 10.0004:
- 11.759
<= - 11.76
单位
32767
32511:
27649
2764820736
:-20736-27648
- 27649:
- 32512
- 32768
测量范围4 .. 20mA
电流例如:
>= 22.815
22.810:
20.0005
20.00016.000
::
4.000
3.9995:
1.1852
<= 1.1845
单位
32767
32511:
27649
2764820736
::
0
- 1:
- 4864
- 32768
测量范围-200...+850ºC
温度例如 Pt100
单位
32767
10000:
8501
8500:::
-2000
- 2001:
- 2430
- 32768
>= 1000.1
1000.0:
850.1
850.0:::
-200.0
- 200.1:
- 243.0
<= - 243.1
测量范围0...300Ohm
电阻例如:
>=352.778
352.767:
300.011
300.000225.000
::
0.000
不允许负值
单位
32767
32511:
27649
2764820736
::
0
- 32768
- 1:
- 4864
Date: 2007-1-15File: SSP2_03C.10
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
模拟输入量的规范化
500,0
0,00 27648
Date: 2007-1-15File: SSP2_03C.11
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
模拟量输出的规范化
27648
0 0,0 100,0
Date: 2007-1-15File: SSP2_03C.12
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
模拟输出量的表达形式
范围
超上限
超上界
额定范围
超下界
超下限
单位
>=32767
32511:
27649
27648:
0:
- 6912
- 6913:::
- 27648
- 27649:
- 32512
<=- 32513
输出范围:
电压
0
11.7589:
10.0004
10.0000:0
0 to 10V 1 to 5V
0
5.8794:
5.0002
5.0000:
1.0000
0
11.7589:
10.0004
10.0000:0:::::::
-10.0000
- 10.0004:
- 11.7589
0
± 10V
0 0.9999
0
0
输出范围:
电流
0
23.515:
20.0007
20.000:0
0 to 20mA 4 to 20mA
0
22.81:
20.005
20.000:
4.000
0
23.515:
20.0007
20.000:0:::::::
-20.000
- 20.007:
- 23.515
0
± 20mA
0 3.9995
0
0
Date: 2007-1-15File: SSP2_03C.13
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
练习3.1:配置模拟量模块SM335
Date: 2007-1-15File: SSP2_03C.14
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
练习3.2: 配置模拟量模块 SM331
Date: 2007-1-15File: SSP2_03C.15
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
练习3.3: 控制罐的液位
液位传感器
最低液位设定为 50L,当实测液位低于该值时,通过 Q 5.2输出一个信息。
最高液位 600L,对应通道0上的10 V 模拟量
Date: 2007-1-15File: SSP2_03C.16
SIMATIC S7Siemens AG 2000. All rights reserved.
Information and Training CenterKnowledge for Automation
练习3.4: 结构化的极限监视功能
FB120
ACTV
HL
LL
HYS
QH
QL
LIMIT
模拟变量的实际值
HL
LL
HYS
HYS
QH
QL
t
功能 符号
LO_LIM
HI_LIM