WAGO 750-341 Manual page 54

50 • Fieldbus Coupler 750-341
Process image
4 Channel Digital Output Modules
750-504, -516, -519, -531
Bit 7
8 Channel Digital Output Module
750-530
Bit 7
controls
DO 8
Channel
3.1.4.3.3 Analog Input Modules
The hardware of an analog input module has 16 bits of measured analog data
per channel and 8 bits of status. However, the Ethernet coupler does not have
access to the 8 status bits. Therefore, the Ethernet coupler 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.
1 Channel Analog Input Module
750-491
Offset
Bit 6 Bit 5
Bit 6 Bit 5
controls controls
DO 7 DO 6
Channel Channel
8 7 6
Byte Destination
High Byte Low Byte
0 D1
1 D3
Output Process Image
Bit 4 Bit 3
controls
DO 4
Channel
4
Output Process Image
Bit 4 Bit 3
controls controls
DO 5 DO 4
Channel Channel
5 4
Input Process Image
D0
D2
Bit 2 Bit 1 Bit 0
controls controls controls
DO 3 DO 2 DO 1
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
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
1
1