S7-300模拟量处理及闭环控制
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PLC
S7-300
Date:2011-12-12File:Analog.3
SIMATIC ®S7
Siem ens AG 2003. All rights reserved.
SITRAIN Training for Automation and Drives
• • • • •p界： • •
±500mV ±1V ±5V ±10V ±20mA 4...20mA
DAC
PQW ...PQW ...:::
PQW ...
MR
ADC
PIW ...PIW ...:::
PIW ...
CPU ::::::
L PIW 304
T PQW 320:
......................................
pH PLC
: ± 500mV, ± 10V, ± 20mA,
CPU ADC
“L PIW…” “T PQW...” DAC
Date:2011-12-12File:Analog.4
SIMATIC ®S7
Siemens AG 2003. All rights reserved.
SITRAIN Training for Automation and Drives
“A” “B” “C” “D”
Date:
2011-12-12File:Analog.5
SIMATIC ®S7
Siemens AG 2003. All rights reserved.
SITRAIN Training for Automation and Drives
S7-300 CPU CPU
CPU RUN ( ) SFC RUN STOP STOP RUN CPU CPU OB82 (OB40
OB47) ( ) CPU OB40 47 :
Date:2011-12-12File:Analog.6
SIMATIC ®S7
Siemens AG 2003. All rights reserved.
SITRAIN Training for Automation and Drives
SM335 ( )
SM331
：：：：
A/D …
：：
/
“ ” “deactivated”
Date:2011-12-12File:Analog.7
SIMATIC ®S7
Siemens AG 2003. All rights reserved.
SITRAIN Training for Automation and Drives
SM335 ( )
SM332
CPU STOP ：： CPU STOP (SV) - ”0”; “ ” (KLV) - CPU STOP (OCV) CPU STOP (V/I = 0 V/mA)
Date:2011-12-12File:Analog.8
SIMATIC ®S7
Siemens AG 2003. All rights reserved.
SITRAIN Training for Automation and Drives
202122232425262728
29
210
211212213214VZ 度接 .
0123456789101112131415
+： 1
1
1
*
*
*
*
*
*
*
**
*
*
*
*
*
*
15
*
= 0 1
8000000001
128********84020108400000000000000000000021
641
321
161
81
41
2*********************************************************************910
1112
1314
15 =0 15 =1
15 “0”
8 15
S7-300
SM334 4 5 ms
Date:2011-12-12File:Analog.9
SIMATIC ®S7
Siemens AG 2003. All rights reserved.
SITRAIN Training for Automation and Drives
±10V
>= 11.75911.7589:
10.000410.007.500-7.50-10.00-10.0004:
-11.759<= -11.76
3276732511:
2764927648207360-20736-27648-27649:
-32512-32768
4 .. 20mA
>= 22.81522.810:
20.000520.00016.000::4.0003.9995:
1.1852<= 1.1845
3276732511:
276492764820736::0-1:
-4864-32768
-200...+850ºC
Pt100
3276710000:85018500:::-2000-2001:
-2430-32768
>= 1000.11000.0:850.1850.0:::
-200.0-200.1:
-243.0<= -243.1
0...300Ohm
>=352.778352.767:
300.011300.000225.000::0.000
3276732511:
276492764820736::0-32768
-1:
-4864