WAGO I/O-SYSTEM 750 Manual page 52

52 • I/O Modules
Special Modules
Active register communication is confirmed by the module in the status byte:
Table 21: Configuration of the status byte
Bit
Value/
Description
Bit
2
2.1.1.8.3.2 Parameter Channel for Data Exchange
A common data channel (parameter channel) between the application and the
I/O module is used to exchange parameter sets acyclically and have them
checked by the complex I/O module. In order to access to all available inter-
faces of a coupler/controller, the parameter channel is mapped to the existing
register model. Currently, the parameter channel can be operated with the fol-
lowing interfaces:
• Manual configuration via access to the process image using the con-
• Software-supported configuration over the asynchronous serial interface of
The parameter channels are mapped through the register of the complex mod-
ule. The following registers are relevant for the user in this case:
• Register 56: Here, parameter data is stored word by word.
• Register 57: Here, the communication control for the data is performed.
The structure of registers 56 and 57 is described in Section 2.1.1.8.3.3.
7
2
1
Value Description
0 5
- 2 Reg. no. Register number
6
2 0 always 0
Always 1 during register communication (confirmation by the bus module)
7
2 1
(Switch between process data communication and register communication)
trol/status byte
the coupler/controller (e.g., via WAGO-I/O-CHECK, WAGO-I/O-PRO
CAA)
Status byte
6 5 4
2 2 2
0
3 2 1
2 2 2
Register number
WAGO-I/O-SYSTEM 750
I/O Modules
0
2