SIPLUS HCS3200
Operating Instructions, 07/2014, A5E31278506C/002
45
Communication
9
9.1
Cyclic data transfer
Communication between the DP master and heating controller is performed exclusively via
cyclic data.
You can access the cyclic data in the PLC software via the inputs (message data) and the
outputs (control data).
9.2
Cyclic input data
The cyclic input data can be addressed in the S7 through the process image or I/O
commands.
Process image inputs (PII)
The process image for the inputs PII contains the status information for the individual
modules. All addresses are specified as an offset relative to the base address 0.0. The
actual addresses are obtained from the configuration of the overall system.
Table 9- 1
Addressing of inputs
Byte
Bit
Meaning
Description
0
0
= 0: Heating switched off
= 1: Heating switched on
Refer to section Power output
1
= 0: Line voltage compensation is not active
= 1: Line voltage compensation is active
Refer to section Line voltage com-
2 ... 7 0 (reserved)
1
0 (reserved)
2
Temperature measurement in °C
Refer to section Temperature
monitoring (Page 43)
3
Factor for line voltage compensation in %
Refer to section Line voltage com-
4
Voltage measured value Lxy
Refer to section Line supply volt-
age monitoring (Page 41)
5
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