Analog Output Modules - WAGO 750 Series Manual

138 • Process Data Architecture for MODBUS/TCP

Analog Output Modules

4 Channel Analog Input Modules
750-453, -455, -457, -459, -460, -468, (and all variations),
753-453, -455, -457, -459
5.2.4 Analog Output Modules
The hardware of an analog output module has 16 bits of measured analog data
per channel and 8 bits of control/status. However, the coupler/controller with
MODBUS/TCP does not have access to the 8 control/status bits. Therefore,
the coupler/controller with MODBUS/TCP can only access the 16 bits of
analog data per channel, which are grouped as words and mapped in Intel
format in the Output Process Image.
When digital output modules are also present in the node, the analog output
data is always mapped into the Output Process Image in front of the digital
data.
2 Channel Analog Output Modules
750-550, -552, -554, -556, -560, -585, (and all variations),
753-550, -552, -554, -556
Byte Destination
Offset
High Byte
0 D1
1 D3
2 D5
3 D7
Byte Destination
Offset
High Byte
0 D1
1 D3
Input Process Image
Low Byte
D0 Measured Value Channel 1
D2 Measured Value Channel 2
D4 Measured Value Channel 3
D6 Measured Value Channel 4
Output Process Image
Low Byte
D0 Output Value Channel 1
D2 Output Value Channel 2
Remark
Remark
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP