Setup guide
OSx Migration Cookbook August 30, 2006
Appendix C – Fast Action Requests
Fast Action Request Configuration Procedure
D ation of a n Request in a m reated in A ging.
Th quest T ariable ored Logging for changes. If
the var le’s value is ise being by thePCS7, Alarm Log ult
to scanning it at a one second rate. This is standard PCS7 behavior.
This procedure is applicable only for Acti uest TRI ER variables na
“tagname.EventRaw#1” that are defined in the SIMATIC 505 CP1434TF RBE channel.
This procedure defi t will cause the TRIGGER variable to have the
hannel “Report by Exception” (RBE) processing. This processing takes each RBE
hange detected in the 505 PLC and places it in the PCS7 DataManager. This will result
in Alarm Logging receiving each change for the TRIGGER tag and thereby the Action
Request is triggered.
When the TRIGGER variable is processed as RBE, each change in the trigger value
detected by the 505 PLC is placed in the PCS7 DataManager.
For the PCS7 505 OS, the only variables that can be given RBE processing are the
variables named “tagname.EventRaw#1”. The variable must be configured in DBA as an
alarm in order for it to have RBE processing.
Simply configuring the TRIGGER variable as an alarm in DBA is sufficient to have a
“Fast” Action Request that triggers on any change detected in the TRIGGER value.
When the TRIGGER is a sampled value being read at the Alarm Logging default one
second rate, then fast changes in the trigger such as a momentary change from ON to
OFF and back to ON will most likely result in the OFF change being missed. However, if
the TRIGGER variable is processed as RBE, each value change will be placed in the
PCS7 DataManager.
Action Request Needs RBE, but TRIGGER ALARM Not Desired
BA configur
e Action Re
n Actio results
is monit
essage c
by Alarm
larm Log
RIGGER v
not otherwiab read ging will defa
on Req GG med
nes the steps tha
c
c
It might be the case that the Action Request must have RBE processing, but the alarm
message for the TRIGGER variable is not desired.
A separate zip file named OS505_ORIGINAL.zip holds a complete PCS7 project, and its
corresponding DBA file and the 505 INSTALL.TAG file. The project was built using the
English language settings in Windows and in PCS7.
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