Description Limit Comment
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.
Device-Specific Limits
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
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 — —
1)
When the limit is exceeded, an error message is iisued by the device. Consequently, the device starts moni-
toring. 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 resolu-
tion of the device of 10 ms, as then, the blocks will not then start with the starting pulse.
Maximum Number of TICKS in the Task Levels
Task level
Limit in TICKS
1)
MW_BEARB (measured value processing) 10000
PLC1_BEARB (slow PLC processing) 12000
PLC_BEARB (fast PLC processing) 600
SFS_BEARB (interlocking) 10000
1)
When the sum of TICKS of all blocks exceeds the limits mentioned before, an error message is output in the
CFC.
Processing Times in TICKS for the Individual Elements
Individual element
Number of TICKS
Block, basic requirement 5
Each input from the 3rd additional input on for generic modules 1
Combination with input signal border 6
Combination with output signal border 7
Technical Data
4.22 User-defined Functions (CFC)
SIPROTEC 4, 7SJ80, Manual 413
E50417-G1140-C343-A8, Edition 12.2017
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