Siemens SINUMERIK 840D sl Function Manual page 290

Detailed description
2.1 Description of diagnostic tools
Functions
• Buffering of a maximum of 16 alarms that have been activated since system powerup and
• Alarm reactions can be programmed as channelspecific, modegroupspecific or NCK-
• The "NoReady" alarm reaction can also be programmed as a channelspecific reaction.
Activation
The alarm handler is activated when an error status is detected in the NCK, causing an
alarm to be output.
It is possible to trigger an alarm in a part program using the SETAL command.
Reference: /PGA/Programming Manual Advanced
Note
The currently active alarms in the NCK are read via the operator panel interface.
It is not possible to set alarms externally in the NCK.
Alarms with an alarm ID in the 60000 to 60999 range can be activated in a part program.
Data backup
On Power ON , the alarm-handler data are reinitialized completely, since they are not
stored in the buffered SRAM.
Compatibility
As of SW 4
As of SW 4.1 and later, it is possible to set the channelspecific signal CHANNEL_NOREADY
in the VDI interface in response to alarms.
Up to SW 3.x
Machine data:
MD11412 $MN_ALARM_REACTION_CHAN_NOREADY
controls whether the channel-specific signal CHANNEL_NOREADY function is used. This
ensures that earlier PLC versions remain compatible.
Default setting: CHANNEL_NOREADY signal is not used.
Alarms that have specified a channelspecific NOREADY signal are reconfigured to the
modegroupspecific NOREADY signal.
8
which have not yet been reset.
specific reactions.
Basic logic functions: Diagnostic tools (D1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0