Additional Limits
Additional Limits
1)
for the Following 4 CFC Blocks
Sequence 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
1)
When the limit is exceeded, an error message is issued by the device. Consequently, the device is put into
monitoring mode. 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) < 30. 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 priority classes
Sequence Level
Limits in TICKS
1)1)
7UT612 7UT613/63x
MW_BEARB (Measured Value Processing) 1200 10000
PLC1_BEARB (slow PLC processing) 255 2000
PLC_BEARB (fast PLC processing) 90 200
SFS_BEARB (interlocking) 1000 10000
1)
When the sum of TICKS of all blocks exceeds the limits before-mentioned, an error indication is output by
CFC.
Processing Times in TICKS required by the Individual Elements
Element
Number of TICKS
Module, basic requirement 5
Each input from the 3rd additional input for generic blocks 1
Connection to an input signal 6
Connection to an output signal 7
Additional for each chart 1
Switching Sequence CMD_CHAIN 34
Status Memory for Restart D_FF_MEMO 6
Feedback Loop LOOP 8
Decode Double Point DM_DECODE 8
Dynamic OR DYN_OR 6
Addition ADD 26
Substraction SUB 26
Multiplication MUL 26
Division DIV 54
Root Extractor SQUARE_ROOT 83
Technical Data
4.20 User-defined Functions (CFC)
458 SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
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