WAGO I/O-SYSTEM 750 Manual page 34

34 • I/O Modules
Special Modules
2.1.1.8.1 Process Data Communication
During active process data communication, cyclic process data is exchanged
between master and slaves.
2.1.1.8.1.1 Configuration of the Control and Status Bytes
In process data communication, the control byte is configured as follows:
Table 12: Configuration of the control byte
Bit
Value/
Description
In the status byte, messages, warnings and errors are signaled as follows:
Table 13: Configuration of the status byte
Bit
Value/
Description
7
2
0
Bit Value Description
0
2 0 Reserved (always 0)
1
2 0 Reserved (always 0)
2
2 0 Reserved (always 0)
3
2 0 Reserved (always 0)
4
2 0 Reserved (always 0)
5
2 0 Mailbox masked
1 Mailbox unmasked
6
2 0 Reserved (always 0)
7
2 0 During process data communication, always 0
(switch between process data communication and register communication)
7
2
Gen-
0
error
Bit Value Description
0
2 0 Reserved (always 0)
0 No warning
Warning of obsolete process data. Indicates that no packet has been received
1
2
1 from the other party for a connection within the time defined as the error limit
(for times, see table from 2.1.1.7.2.3)
Control byte
6 5
2 2
0 Mailbox
Status byte
6 5 4
2 2 2
eral Mailbox 0
4 3 2
2 2 2
0 0 0
3 2
2 2
General. Mailbox Monitoring of
warning (remote) time behavior
WAGO-I/O-SYSTEM 750
1 0
2 2
0 0
1 0
2 2
0
I/O Modules