Trigger" Tab - Siemens TIM 1531 IRC Operating Instructions Manual

Configuration
4.22 Data points
● Low-priority read jobs - proportion
(Normal cycle)
For data points with the assignment "Normal cycle", a proportion of the values of their
PLC tags is read in every scan cycle.
The number of tags read per cycle is specified for the transferring module in the
"Communication with the CPU" parameter group with the "Max. number of read jobs"
parameter. The tags that exceed this value and can therefore not be read in one cycle
are then read in the next or one of the following cycles.
● Cycle idle time
This waiting time between two scan cycles is used to reserve adequate time for other
processes that access the CPU.
4.22.6

"Trigger" tab

Trigger
Data points are configured as a static value or as an event using the "Type of transmission"
parameter:
Saving the value of a data point configured as an event
Saving the value of a data point configured as an event in the send buffer (message
memory) can be triggered by various trigger types:
● Threshold value trigger
The value of the data point is saved when this reaches a certain threshold. The threshold
is calculated as the difference compared with the last stored value, refer to the section
Threshold value trigger (Page 118).
● Time trigger
The value of the data point is saved at configurable intervals or at a specific time of day.
● Event trigger (Trigger tag)
The value of the data point is saved when a configurable trigger signal is fired. For the
trigger signal, the edge change (0 → 1) of a trigger tag is evaluated that is set by the user
program. When necessary, a separate trigger tag can be configured for each data point.
Resetting the trigger tag in the bit memory area / DB:
If the memory area of a trigger tag is in the bit memory or in a data block, the module
resets the trigger tag itself to 0 (zero) as soon as the value of the data point has been
transferred. This can take up to 500 milliseconds.
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Operating Instructions, 02/2018, C79000-G8976-C468-02
TIM 1531 IRC