Machine Trigger On "Plc Variable" - Siemens SINUMERIK 840Di sl Function Manual

12/2008
Note
If an alarm occurs, an action is only initiated if the PLC condition described here
occurs at the same time. If an alarm is pending and the condition is met after this,
the action will not be initiated.
See also: 3.4.5 Machine trigger on "PLC variable"

3.4.5 Machine trigger on "PLC variable"

Description of functions
Complex logic operations and value comparisons for PLC variables can be set up
using machine triggers for "PLC variable". PLC conditions for "alarm group"
triggers are configured in the same way as triggers for "PLC variable".
Note
In order to be able to use "PLC variable" triggers, PLC conditions (for conditional
alarms) and PLC traces in monitors, the control must be set up accordingly (see
/R1/). If it has not been set up correctly, you can set these functions in the
monitors but you cannot activate them on the control.
You must also enter the settings for the data blocks used for the machine (see
Section 3.4 "Global settings").
Fig. 3-22: Trigger on "PLC variable" - Adding addresses
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ePS Network Services, Function Manual (FH) - Release 12/2008
3 Setting up functions
3.4 Fault services
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