Fieldbus controller 750-842 • 61
Process data architecture for MODBUS/TCP
Modular I/O System
ETHERNET TCP/IP
3.2.4.3.2 750-404/000-005 2 Channel Up Counter 16 Bit
The data format of the counter modules five bytes is mapped out by the mo-
dule as four data bytes and one additional control/status byte, while occupying
3 words each with word-alignment.
Address
Bytes
Comment
Module
Offset
High
Low
0
C/S
Control/ Statusbyte
1
D1
D0
Data bytes Counter 1
2
D3
D2
Data bytes Counter 2
Module 1:
750-404/000-005
3
User data
User data
Data bytes
Module 2:
Analog module Channel 1
4
User data
User data
Data bytes
Module 2:
Analog module Channel 2
...
...
...
...
...
The input bytes D0 and D1 form the 16 bit reading of counter 1 and the input
bytes D2 and D3 form the 16 bit reading of counter 2.
When setting the counter, the load value of counter 1 is transferred in the out-
put bytes D0 and D1. The load value of counter 2 is transferred respectively in
the output bytes D2 and D3.
3.2.4.3.3 750-511, /000-002 2-Channel Digital Pulsewidth module
This process data architecture holds true for the 2 Channel Pulsewidth modu-
les 750-511 and 750–511/000-002.
Item-No.:
Description:
750-511
2DO 24V DC 0.1A Pulsewidth
750-511/000-002
2DO 24V DC 0,1A Pulsewidth 100Hz
The process image of the 750-511 and 750-511/000-002 appears with 6 bytes
of input and 6 bytes of output data, while occupying 4 words each in the proc-
ess image with word-alignment.
Address
Bytes
Comment
Module
Offset
High
Low
0
C/S-0
Control / Status byte
1
D1-0
D0-0
Data bytes
Module 1 Channel 1:
750-511,
750-511/000-002
2
C/S-1
Control / Status byte
3
D1-1
D0-1
Data bytes
Module 1 Channel 2:
750-511,
750-511/000-002
4
User data
User data
Data bytes
Module 2:
Analog Module Channel 1
5
User data
User data
Data bytes
Module 2:
Analog Module Channel 2
...
...
...
...
...
