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System Function Blocks - Siemens CPU 412-1 Instruction Manual

S7-400; cpu 412 series; cpu 414 series; cpu 416 series; cpu 417 series;.
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System Function Blocks

The following table lists the system function blocks provided with the operating system of the S7-400 CPUs as well as the execution times
of the individual CPUs (X: function exists, execution times were not available when manual was printed).
SFC
SFC Name
No.
0
CTU
Count up
1
CTD
Count down
2
CTUD
Count up and down
3
TP
Generate pulse
4
TON
Generate on-delay
5
TOF
Generate off-delay
8
USEND
Send data without coordination
(one send parameter supplied)
JOB activated (1 - 440 bytes)
JOB checked
JOB finished (DONE = 1)
S7-400 Instruction List
A5E00267845-01
Function
4
4
4
26
25
19
426 -
448
147
147
Execution Time in ms
CPU
CPU
CPU
412
414
416
3
1
2
1
2
1
15
10
15
10
11
7
245 -
164 -
260
174
86
57
84
56
System Function Blocks
CPU
CPUs
CPUs
417
414-4H
414-4H
417-4H
417-4H
(solo)
(redun-
dant)
1
xx
xx
1
xx
xx
1
xx
xx
8
xx
xx
8
xx
xx
6
xx
xx
139 -
xx - xx
xx - xx
153
49
xx
xx
48
xx
xx
139

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