3 Basics
3.2 Communication
HCS4x00Library
Entry ID: 109478117, V2.2.1, 09/2018
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3.2
Communication
3.2.1
Cyclic data exchange
The cyclic data exchange between heating control system and S7 is performed via
the process / I/O address area of the CPU.
Figure 3-1
S7-1500
SIMATIC
SIPLUS
HCS4300
HCS4200
CIM4310
POM4320
8 bytes (status bits &
U
L12
/U
L23
/U
L31
)
2 bytes (control bits)
2 bytes (control bits)
2 bytes (status bits)
2 bytes (16 dig. outputs)
1 byte (8 dig. inputs)
2 bytes (T
Comp
)
16 bytes (measured values)
12 bytes (setpoints)
12 bytes (actual values)
16 bytes (setpoints)
16 bytes (actual values)
POM4220 Lowend
POM4220 Midrange (with phase control)
POM4220 Flexible
9 bytes (setpoints)
9 bytes (actual values)
PM4000 temperature
PM4000 DI/DO
PM4000 U/I
6 bytes (voltages)
CIM4210
S7-1200
8 words (setpoints)
8 words (actual values)
POM4220 Highend