Siemens SIPROTEC 4 7UT6 Series Manual page 458

Technical Data
4.20 User-defined Functions (CFC)
Additional Limits
Additional Limits 1) for the Following 4 CFC Blocks
Sequence Level
TIMER
MW_BEARB
PLC1_BEARB
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
MW_BEARB (Measured Value Processing)
PLC1_BEARB (slow PLC processing)
PLC_BEARB (fast PLC processing)
SFS_BEARB (interlocking)
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
Module, basic requirement
Each input from the 3rd additional input for generic blocks
Connection to an input signal
Connection to an output signal
Additional for each chart
Switching Sequence
Status Memory for Restart
Feedback Loop
Decode Double Point
Dynamic OR
Addition
Substraction
Multiplication
Division
Root Extractor
458
2) 3) TIMER_SHORT
15
CMD_CHAIN
D_FF_MEMO
LOOP
DM_DECODE
DYN_OR
ADD
SUB
MUL
DIV
SQUARE_ROOT
CMD_CHAIN
2) 3)
30 20
Limits in TICKS
7UT612
1200
255
90
1000
C53000-G1176-C230-5, Edition 09.2016
D_FF_MEMO
350
1)1)
7UT613/63x
10000
2000
200
10000
Number of TICKS
5
1
6
7
1
34
6
8
8
6
26
26
26
54
83
SIPROTEC 4, 7UT6x, Manual