Siemens SINUMERIK 828D

Z1: NC/PLC interface signals
19.5 Help function output to PLC (H2)
Basic Functions
1662 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
19.5 Help function output to PLC (H2)
19.5.1 Signals to channel (DB21, ...)
19.5.2 Signals from channel (DB21, ...)
DB21, ...
DBX30.5 Activate associated M01
Edge evaluation: no Signal(s) updated:
Signal state 1 or
edge change
0 → 1
PLC signals the NCK that the associated M01 (help function) should be activated.
Signal state 0 or
edge change
1 → 0
De-activate the associated M01 (help function).
Corresponding to .... DB21, ... DBX 318.5 (associated M01 active)
DB21, ...
DBB58,
DBB60 - DBB65
M, S, T, D, H, F functions Modification
Edge evaluation: No Signal(s) updated: job-controlled by NCK
Signal state 1 or
edge change
0 → 1
One M, S, T, An D, H, or F function has been output to the interface with a new value together with
the associated change signal at the beginning of an OB1 cycle.
In this case, the change signal indicates that the appropriate value is valid.
Signal state 0 or
edge change
1 → 0
The change signals are reset by the PLC basic program at the start of the next OB1 cycle.
The value of the data involved is not valid.
DB21, ...
DBX59.0 - DBX59.4 M fct. 1-5 not decoded
Edge evaluation: No Signal(s) updated: job-controlled by NCK
Signal state 1 or
edge change
0 → 1
M function is greater than 99 (for extended address = 0) or for extended address > 0, not included in
the decoding list.
This signal is available - together with the associated M change signal - for one OB1 cycle.
Cause:
• Incorrect M function programmed
• M function not configured in the decoding list of the PLC
Remedy, e.g.:
• PLC sets read-in disable
• Output of a PLC alarm
Signal state 0 or
edge change
1 → 0
M function less than 99 (for extended address = 0) or for extended address > 0 included in the
decoding list.