Analog Input Modules; Channel Analog Input Modules; Table 437: 1 Channel Analog Input Modules - WAGO -I/O-SYSTEM 750 Manual

378 I/O Modules
13.3.3

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 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 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).
Information for the control/status byte development
Please refer to the corresponding description of the I/O modules for the structure
of the control/status bytes. You can find a manual with the relevant I/O module
description on the WAGO home page: at:
13.3.3.1

1 Channel Analog Input Modules

750-491, (and all variations)

Table 437: 1 Channel Analog Input Modules

Input Process Image
Instance
n
n+1
The input modules represent 2x2 bytes and seize 2 Instances in Class (0x67).
Manual
1.5.0
750-882 Media Redundancy ETHERNET Controller
Byte Destination
High Byte
D1
D3
WAGO-I/O-SYSTEM 750
http://www.wago.com
Low Byte
D0
D2
.
Description
Measured Value U
D
Measured Value U
ref