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BACnet/IP Controller 750-830
Process
Image
WAGO-I/O-SYSTEM
750
BACnet/IP Controller
3.1.5.3 Example of an Output Data Process Image
The following example for the output process image comprises 2 digital and 4
analog outputs.
It comprises 4 words for the analog outputs and 1 word for the digital outputs,
i.e. 5 words in total.
In addition, the output data can also be read back with an offset of 200
hex
(0x0200) added to the MODBUS address.
Note
All output data greater than 256 words and therefore located in the memory
range 6000
hex
(0x6000) to 66F9
hex
(0x66F9) can be read back with an offset
of 1000
hex
(0x1000) added to the MODBUS address.
Bit 1
Bit 2
Word2
Word1
Word2
Word1
Word2
Word1
Word2
Word1
Word2
Word1
Word2
Word1
0x0003 / 0x0203 %QW3
0x0002 / 0x0202 %QW2
0x0001 / 0x0201 %QW1
0x0000 / 0x0200 %QW0
0x0004 / 0x0204 %QW4
0x0203 %QW3
0x0202 %QW2
0x0201 %QW1
0x0200 %QW0
0x0204 %QW4
0x0000 / 0x0200 %QX4.0
0x0001 / 0x0201 %QX4.1
0x0200 %QX4.0
0x0201 %QX4.1
AO
DO
AO
Highbyte
Lowbyte
Highbyte
Lowbyte
LINK
MS
NS
ETHERNET
TxD/RxD
I/O
USR
750-841
MODBUS addresses
MODBUS addresses
MODBUS addresses
MODBUS addresses
Process output image
(Word)
Process input image
(Word)
Process output image
(Bit)
Process input image
(Bit)
DO: Digital Output
AO: Analog Output
Output modules
750 - 501
550
550
Fig. 3-7: Example of process image for output data
G015025e