Technical Data
4.25 User-defined Functions (CFC)
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
632
Device-specific Limits
Additional Limits
1)
When the limit is exceeded, an error indication is output by the device. Consequently, the device starts monitoring. The
red ERROR-LED lights up.
2)
TIMER and TIMER_SHORT share the available timer resources. The relation is TIMER = 2 · system timer and
TIMER_SHORT = 1 · system timer. For the maximum used timer number the following side conditions are valid: (2 ·
number of TIMERs + number of TIMER_SHORTs) < 20. The LONG_TIMER is not subject to this condition.
3)
The time values for the blocks TIMER and TIMER_SHORT must not be smaller than the time resolution of the device,
i.e. 5 ms, otherwise the blocks will not start with the starting impulse issued.
Maximum Number of TICKS in the Task Levels
1)
When the sum of TICKS of all blocks exceeds the limits before-mentioned, an error message is output by CFC.
Description Limit Comments
Maximum number of concurrent changes to planned inputs
per task level
Chart inputs per task level
50 When the limit is exceeded, an error
message is output by the device. Conse-
quently, the device is put into monitoring
mode. The red ERROR-LED lights up.
Maximum number of chart outputs per task level 150
Additional limits
1)
for the following 4 CFC blocks:
Task Level
TIMER
2)
3)
TIMER_SHORT
2)
3)
CMD_CHAIN D_FF_MEMO
MW_BEARB
350
PLC1_BEARB
15 30 20
PLC_BEARB
SFS_BEARB
Task Level Limit in TICKS
1)
MW_BEARB (Measured Value Processing) 10 000
PLC1_BEARB (Slow PLC Processing) 1 900
PLC_BEARB (Fast PLC Processing) 200
SFS_BEARB (switchgear interlocking) 10 000
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