Siemens SIMATIC S7-300 Manual page 9

4 Priniples of analog value processing ...................................................................................................... 4-1
4.1 Overview .................................................................................................................................... 4-1
4.2 Wiring transducers to analog inputs .......................................................................................... 4-1
4.2.1 Wiring electrically isolated transducers...................................................................................... 4-3
4.2.2 Wiring electrically non-isolated transducers .............................................................................. 4-5
4.3 Connecting voltage transducers ................................................................................................ 4-7
4.4 Connecting current transducers................................................................................................. 4-8
4.5 Wiring resistance thermometers and resistors ........................................................................ 4-10
4.6 Wiring thermocouples .............................................................................................................. 4-12
4.6.1 Connecting thermocouples with internal compensation .......................................................... 4-15
4.6.2 Connecting thermocouples with external compensation ......................................................... 4-16
4.7 Connecting loads/actuators to analog outputs......................................................................... 4-20
4.7.1 Connecting loads/actuators to voltage outputs........................................................................ 4-21
4.7.2 Connecting loads/actuators to current outputs ........................................................................ 4-23
5 Representation of the analog values of analog modules......................................................................... 5-1
5.1 Representation of the analog values of analog input channels ................................................. 5-2
5.2 Representation of the analog values of analog output channels............................................. 5-18
5.3 Setting the measuring method and ranges of analog input channels...................................... 5-21
5.4 Reactions of the analog modules............................................................................................. 5-23
5.4.1 Influence of the supply voltage and operating mode ............................................................... 5-23
5.4.2 Influence of the range of analog values................................................................................... 5-25
5.4.3 Influence of operational limits and basic error limits ................................................................ 5-26
5.5 Conversion and cycle times of analog modules ...................................................................... 5-27
5.6 Settling and response times of analog output channels .......................................................... 5-30
5.7 Programming analog modules ................................................................................................. 5-31
5.7.1 Parameters of analog input modules ....................................................................................... 5-31
5.8 Diagnostics functions of analog modules ................................................................................ 5-32
5.8.1 Diagnostic messages of analog input modules ....................................................................... 5-33
5.8.2 Diagnostics messages of analog output modules ................................................................... 5-33
5.8.3 Causes of error and troubleshooting at analog input modules ................................................ 5-34
5.8.4 Causes of error and troubleshooting at analog output modules.............................................. 5-34
5.9 Interrupts of analog modules ................................................................................................... 5-35
6 Analog modules ...................................................................................................................................... 6-1
6.1 Steps from the selection of analog modules to commissioning................................................. 6-2
6.2 Module overview ........................................................................................................................ 6-3
6.2.1 Analog input modules: ............................................................................................................... 6-3
6.2.2 Analog output modules: ............................................................................................................. 6-6
6.2.3 Analog IO modules: ................................................................................................................... 6-7
6.3 Analog input module SM 331; AI 8 x 16 Bit; (6ES7331-7NF00-0AB0)...................................... 6-8
6.3.1 Measuring methods and ranges .............................................................................................. 6-13
6.3.2 Adjustable parameters ............................................................................................................. 6-13
6.3.3 Additional information on SM 331; AI 8 x 16 bit....................................................................... 6-15
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
Table of contents
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