Example Of A Process Output Image - WAGO 750-341 Manual

3.1.4.2

Example of a Process Output Image

The following figure is an example of a process output image. The
configuration includes 2 digital and 4 analog outputs. Therefore, the process
image has a total data length of 5 (4 words for the analog data and 1 word for
the digital outputs). When using MODBUS protocol, output data can be read
back with an offset of 200
Note
All output data over 256 words can be read back with an offset of 1000
(0x1000) added onto the MODBUS address.
Process output image
MODBUS addresses
0x0000 / 0x0200
0x0001 / 0x0201
0x0002 / 0x0202
0x0003 / 0x0203
0x0004 /
0x0204
Process input image
MODBUS addresses
0x0200
0x0201
0x0202
0x0203
0x0204
Fig. 3.1-5: Example of a Process Output Image
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
DO
ETHERNET
LINK
MS
NS
TxD/RxD
I/O
Output modules 750 - 501
Bit 2
(Word)
Word1
Word2
Word1
Word2
Highbyte Lowbyte
(Word)
Word1
Word2
Word1
Word2
Highbyte
Lowbyte
Process output image
(Bit)
MODBUS addresses
0x0000 / 0x0200
0x0001 / 0x0201
Process input image
(Bit)
MODBUS addresses
0x0200
0x0201
DO: Digital Output
(0x0200) added to the MODBUS address.
hex
AO AO
550 550
Bit 1
Word1
Word1
Word2
Word2
AO: Analog Output
Fieldbus Coupler 750-341
Process image
• 45
hex
G012925e