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System Functions - 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 Functions

The following tables show the system functions which are provided by the operating system of the S7-400 CPUs and the execution times
for the various CPUs. (X: function available, execution times not yet available before printing).
SFC
SFC Name
No.
0
SET_CLK
Set clock
1
READ_CLK
Read clock
2
SET_RTM
Set run-time meter
3
CTRL_RTM
Start and stop run-time meter
4
READ_RTM
Read run-time meter
5
GADR_LGC
Find logical address of a channel
Rack 0
internal DP
6
RD_SINFO
Read start information of current OB
7
DP_PRAL
Trigger a process interrupt at the DP
master
First call
Intermediate call
Last call
S7-400 Instruction List
A5E00267845-01
Function
Execution Time in ms
CPU
CPU
CPU
412
414
416
195
111
75
31
18
13
27
16
11
23
14
10
29
18
12
38
23
15
51
31
21
33
20
14
275
170
113
25
15
10
25
15
10
System Functions
CPU
CPU
CPU
417
414-4H
414-4H
417-4H
417-4H
(solo)
(redun-
dant)
66
xx
xx
10
xx
xx
9
xx
xx
8
xx
xx
10
xx
xx
13
xx
xx
18
xx
xx
11
xx
xx
106
––
––
8
--
--
8
--
--
106

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