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Fieldbus controller 750-842
Process data architecture for MODBUS/TCP
Modular I/O System
ETHERNET TCP/IP
3.2.4.3.1 750-404, /000-00X Counter modules
This process data architecture holds true for the counter modules 750-404,
750-404/000-001, 750-404/000-002 and 750–404/000-004.
Item number:
Description:
750-404
Up/Down Counter
750-404/000-001
2 Channel Up Counter with enable input
750-404/000-002
Peak Time Counter
750-404/000-004
Up/Down Counter (switching outputs)
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. The module
supplies a 32 bit counter-output, while occupying 3 words each in the process
image with word-alignment.
Address
Bytes
Comment
Module
Offset
High
Low
0
C/S
Control-/ Status byte
1
D1
D0
2
D3
D2
Data bytes
Module 1:
750-404,
750-404/000-001,
750-404/000-002,
750-404/000-004
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 to D3 form the 32 bit counter-output.
In the output bytes D0 to D3 the initial value of the counter can be set.
