Siemens SIMATIC S5 Manual page 44

Ip 244 temperature controller with function block fb 162
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Technical Description
The microprocessor ( P) processes the different functions of the controller module:
– Measuring values at a high common-mode range
– Measuring values via multiplexer and ADC
– Processing measured values according to the control algorithm (calculating system deviation
and manipulated variable, self-optimization)
– Monitoring values for alarm limits and generating alarms
– Outputting manipulated variables via registers and output driver stages
– Computing the temperature compensation values according to the reference junction tem-
perature (Pt 100)
– Controlling the interface to the S5 system bus
Fig. 1.3/1 Block diagram of the temperature controller (IP 244 B-3AB31)
The module can be used as a switching two- or three-step controller with percentage output
according to the control algorithm in the EPROM.
The controller's response (P, PI, PD, PID) is defined by parameters. 64 message frames of 32
bytes each are used for communication (setpoint values and parameters) between the CPU and
the temperature controller module.
3–6
IP244B
C79000–B8576–C865–01

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