Technical Data
4.21 User-defined Functions (CFC)
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
405
General Limits
Device-Specific Limits
Additional Limits
1)
When the limit is exceeded, an error message is iisued by the device. Consequently, the device starts mon-
itoring. The red ERROR-LED lights up.
2)
The following condition applies for the maximum number of timers: (2 · number of TIMER + number of
TIMER_SHORT) < 30. TIMER and TIMER_SHORT hence share the available timer resources within the
frame of this inequation. The limit does not apply to the LONG_TIMER.
3)
The time values for the blocks TIMER and TIMER_SHORT must not be selected shorter than the time res-
olution of the device of 10 ms, as then, the blocks will not then start with the starting pulse.
Task levels: Recommendation: Into task levels PLC1_BEARB and PLC_BEARB, because
these levels are directly triggered.
Note: If you use thi block in the task levels MW_BEARB and SFS_BEARB, a
change of the SWITCH signal is only recognized if the signal lasts longer than
the processing cycle of the task level.
Behavior of inputs and out-
puts:
Description Limit Comment
Maximum number of all CFC charts
considering all task levels
32 If the limit is exceeded, the device rejects the parameter set
with an error message, restores the last valid parameter set
and restarts using that parameter set.
Maximum number of all CFC charts
considering one task level
16 When the limit is exceeded, an error message is output by
the device. Consequently, the device starts monitoring. The
red ERROR-LED lights up.
Maximum number of all CFC inputs
considering all charts
400 When the limit is exceeded, an error message is output by
the device. Consequently, the device starts monitoring. The
red ERROR-LED lights up.
Maximum number of reset-resistant
flipflops
D_FF_MEMO
350 When the limit is exceeded, an error message is output by
the device. Consequently, the device starts monitoring. The
red ERROR-LED lights up.
Description Limit Comment
Maximum number of synchronous
changes of chart inputs per task level
165 When the limit is exceeded, an error message is output by
the device. Consequently, the device starts monitoring. The
red ERROR-LED lights up.
Maximum number of chart outputs per
task level
150
Additional limits
1)
for the following CFC blocks:
Task Level Maximum Number of Modules in the Task Levels
TIMER
2)
3)
TIMER_SHORT
2)
3)
MW_BEARB — —
PLC1_BEARB
15 30
PLC_BEARB
SFS_BEARB — —
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