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, a fault indication is output 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. The following condition applies for the maximum number of timers: (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 selected shorter than the time resolution of the
device of 5 ms, as 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) 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
Flip-Flop 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
Division DIV 54
Square root SQUARE_ROOT 83
Timer TIMER_SHORT 8
Timer LONG_TIMER 11
Blinker lamp BLINK 11
Counter COUNTER 6
Adapter REAL_TO_DINT 10
Technical Data
4.17 User-defined Functions (CFC)
SIPROTEC 4, 7SD80, Manual 291
E50417-G1100-C474-A2, Edition 02.2018
To Next Page
Loading...
