Variable Monitors - Siemens SINUMERIK Series Function Manual

03/2012

2.2.7 Variable monitors

Function description
Variable monitors enable the recording in the control of changes over time of any
status data. The variable monitors are essentially for long-term recording in slow
data recording cycles (as opposed to the PLC trace).
Variables can be recorded in a variable monitor. Depending on the variable type,
the recording cycle is not absolutely synchronous. The PLC variables recorded can
be from the PLC environment: inputs, outputs, counters, flags, and any data ad-
dresses in PLC blocks. From the NC environment, they can be machine data, set-
ting data, system variables and others.
The variables recorded can be scaled and assigned freely definable units. Individ-
ual variables of a variable monitor can be identified as counting variables (e.g.
workpiece counters). These variables can be used in the configuration of interval
triggers to trigger recurring actions after a certain number of counting units have
elapsed. Counting variables are counted up monotonically. Resetting of the vari-
ables in the control is compensated for by the system because the count is re-
sumed on the basis of the last value before reset.
Limit values can be configured for each variable for automatic monitoring of the
state. Actions can be triggered when limit values are violated. This is the same as
described for the control monitors.
Selection and filter area
Fig. 2-28: Select variable monitors
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ePS Network Services, Function Manual (FH) - 03/2012
2.2 Variable monitors – time series – measurements and measurement series
2 Machine Information
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