System Functions
112
S7-400 Instruction List
A5E00267845-01
Execution Time in
s
SFC
No.
SFC Name
Function
CPU
412
CPU
414
CPU
416
CPU
417
CPUs
414-4H
417-4H
(solo)
CPUs
414-4H
417-4H
(redun-
dant)
19
ALARM_SC
Acknowledgment status of the last
ALARM_SQ entering state message.
81
45
30
25
xx
xx
20
BLKMOV
Copy variable
within the work memory
(n = number of bytes to be copied)
50 +
n
*
0.05
31 +
n
*
0.03
21 +
n
*
0.02
17 +
n
*
0.014
xx +
n
*
yy
xx +
n
*
yy
Source = Load memory
522 +
n
*
0.45
380 +
n
*
0.3
317 +
n
*
0.27
301 +
n
*
0.25
xx +
n
*
yy
xx +
n
*
yy
21
FILL
Set array default variables
within the work memory
(n = length of target variables in bytes)
43 +
n
*
0.024
26 +
n
*
0.016
17 +
n
*
0.012
13 +
n
*
0.01
xx +
n
*
yy
xx +
n
*
yy
22
CREAT_DB
Create data block
n = DB length [bytes]
111
65
43
38
xx +
n
*
yy
xx +
n
*
yy
Occupy last free DB No. from a field of
100 DBs
517
294
196
164
xx
xx
23
DEL_DB
Delete data block
112
67
45
39
xx
xx
24
TEST_DB
Test data block
35
21
14
12
xx
xx
25
COMPRESS
Compress user memory
First call (trigger)
112
64
43
38
xx
xx
Intermediate call (active)
24
14
10
8
xx
xx
