Device-specific Limits
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 indica-
tion 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 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
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
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
1)
When the sum of TICKS of all blocks exceeds the limits before-mentioned, an error message is output by
CFC.
Processing Times in TICKS required by the Individual Elements
Individual Element
Number of TICKS
Block, basic requirement 5
Each input more than 3 inputs for generic modules 1
Connection to an input signal 6
Connection to an output signal 7
Additional for each chart 1
Operating sequence module CMD_CHAIN 34
Flipflop D_FF_MEMO 6
Loop module LOOP 8
Decoder DM_DECODE 8
Dynamic OR DYN_OR 6
Addition ADD 26
Subtraction SUB 26
Multiplication MUL 26
Technical Data
4.8 User-defined Functions (CFC)
252 SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
To Next Page
Loading...
