Fieldbus coupler 750-342 • 29
Data exchange
Modular I/O System
ETHERNET TCP/IP
The module is seen like an analog input with 2 x 16 Bit input data, i.e. with a
total of 4 bytes user data. With word-alignment 2 words are used in the input
area of the local process image.
Address
Bytes
Comment
Module
Offset
High
Low
0
D1
D0
1
D3
D2
Data bytes
Module 1:
750-630,
750-630/000-001,
750-630/000-006
2
User data
User data
Data bytes
Module 2:
Analog module Channel 1
3
User data
User data
Data bytes
Module 2:
Analog module Channel 2
...
...
...
...
...
3.1.4.3.5 750-631, /000-001 Incremental Encoder Interface
This process data architecture holds true for the Incremental Encoder Interface
modules 750-631 and 750–631/000-001.
Item-No.:
Description:
750-631
Incremental encoder interface, 4 times sampling
750-631/000-001
Incremental encoder interface, 1 times sampling
The bus module 750-631 and 750-631/000-001 002 appears with 6 bytes of
input and 6 bytes of output data and occupying 4 words each with word-align-
ment.
Address
Bytes
Comment
Module
Offset
High
Low
0
C/S
Control / Status byte
1
D1
D0
ead/set counter word
3
(D2)*
)
(period)
4
D4
D3
read latch word
Module 1:
750-631,
750-631/000-001
5
User data
User data
Data bytes
Module 2:
Analog module Channel 1
6
User data
User data
Data bytes
Module 2:
Analog module Channel 2
...
...
...
...
...
In the low byte, the control/status byte is on offset 0.
The data word D0/D1 contains the counter word (read/set), whereas the data
word D3/D4 contains the latch word (read).
*
)
In the operating mode of permanent period measurement, the period dura-
tion is in D2 together with D3/D4.
