Analog Input Modules - WAGO 750-872/020-000 Manual

Diagnosti
c bit S 7
Channel
The output modules seize 8 Instances in Class (0x65).
controls
Channel
And the output modules seize 8 Instances in Class (0x66).

5.3.3 Analog Input Modules

The hardware of an analog input module has 16 bits of measured analog data
per channel and 8 bits of control/status. However, the coupler/controller with
EtherNet/IP does not have access to the 8 control/status bits. Therefore, the
coupler/controller with EtherNet/IP can only access the 16 bits of analog data
per channel, which are grouped as words and mapped in Intel format in the
Input Process Image.
When digital input modules are also present in the node, the analog input data
is always mapped into the Input Process Image in front of the digital data.
Each input channel seizes one Instance in the Analog Input Point Object
(Class 0x67).
1 Channel Analog Input Module
750-491, (and all variations)
The input modules represent 2x2 bytes and seize 2 Instances in Class (0x67).
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Bit 7 Bit 6 Bit 5
Diagnost Diagnost
ic bit S 6 ic bit S 5
Channel Channel
8 7 6
Diagnostic bit S = '0'
Diagnostic bit S = '1'
Bit 7 Bit 6 Bit 5
controls controls
DO 8 DO 7 DO 6
Channel Channel
8 7 6
Byte Destination
Offset
High Byte
0 D1
1 D3
Process Data Architecture for EtherNet/IP
Input Process Image
Bit 4 Bit 3
Diagnost Diagnost
ic bit S 4 ic bit S 3
Channel Channel
5 4
no Error
overload, short circuit, or broken wire
Output Process Image
Bit 4 Bit 3
controls controls
DO 5 DO 4
Channel Channel
5 4
Input Process Image
Low Byte
D0
D2
I/O Modules
Bit 2 Bit 1 Bit 0
Diagnost Diagnost Diagnosti
ic bit S 2 ic bit S 1 c bit S 0
Channel Channel Channel
3 2
Bit 2 Bit 1 Bit 0
controls controls controls
DO 3 DO 2 DO 1
Channel Channel Channel
3 2
Remark
Measured Value U
D
Measured Value U
ref
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