Wago-I/O-System - WAGO -I/O-SYSTEM 750 Series Manual

"Safety at Work" list 1
Function: 0x00
List of the safety-related input slaves ("AS-Interface Safety at Work"), in
which the safety function has tripped.
Safety-related input slaves have the profile S-7.B or S-0.B. (IO = 0 or 7,
ID = B, see Chapter 5.5.1 "Mailbox commands": "Read actual configuration
data").
The "Safety at Work" list 1 is a bit list, which contains one bit for each
possible slave address (1 - 31). This list appears in bytes 5 to 8 of the response
to the mailbox command. In addition, in bytes 3 and 4, the response contains
the EC flags of the master (see Chapter 5.5.1 "Mailbox commands": "Read
flags").
The bits of the "Safety at Work" list 1 are set when the slave safety function
has tripped (e.g. Emergency Stop button pressed). In the case of safety slaves
with two contacts, the corresponding bit is only set when both contacts have
tripped.
Otherwise the bits have the value 0. The bits have the value 0 even in the case
of "normal" (not safety-related) slaves.
As the safety monitor also trips when a safety slave is missing or if the AS-
Interface circuit has been switched off (offline active), the EC flags are
transferred at the same time. It is, however, sufficient to monitor the collective
fault message Cok (configuration error). The list of "safety-related input
slaves" can be used as long as there is no configuration error.
Safety-related slaves, which have been set up but are not present, and slaves,
which are present but transmit an incorrect code sequence, are not entered in
this list.
Byte

WAGO-I/O-SYSTEM 750

I/O Modules
Request
7 6 5
2 2 2
1
2 T 0
3
Mailbox command - Reference
4 3 2 1
2 2 2 2
0x7E
-
0x00
Appendix
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