WAGO I/O-SYSTEM 750 Manual page 51

2.1.1.8.3 Register Communication
Register communication allows direct access to 64 module registers. These
serve exclusively for module configuration on the lowest level. Register com-
munication is active if bit 2
The contents of the register follow the control/status and internal bytes in
D0/D1 of the input/output process image:
Table 19: Setup of the process image during register communication
Byte
2.1.1.8.3.1 Configuration of the Control and Status Bytes
The status byte is configured as follows during register communication:
Table 20: Configuration of the control byte
Bit
Value/
Description
Bit
2
WAGO-I/O-SYSTEM 750
I/O Modules
Word Input process image
0 0 Control byte
1 Internal byte
2 1
3
7
2
1
Value Description
0 5
- 2
Reg. no. Register number (for example, 56 or 57)
6
2 0 Read access
1 Write access
7
2 1 Always 1 during register communication
(Switch between process data communication and register communication)
7
is set.
Output process image
Status byte
Internal byte
D0
D1
Control byte
6 5
2 2 2
Read/
Write
I/O Modules
Special Modules
D0
D1
4 3 2
2 2
Register number
• 51
1 0
2 2