System Functions
106
S7-400 Instruction List
A5E00267845-01
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).
Execution Time in s
SFC
No.
SFC Name Function
CPU
412
CPU
414
CPU
416
CPU
417
CPU
414-4H
417-4H
(solo)
CPU
414-4H
417-4H
(redun-
dant)
0 SET_CLK Set clock 195 111 75 66 xx xx
1
READ_CLK Read clock 31 18 13 10 xx xx
2
SET_RTM Set run-time meter 27 16 11 9 xx xx
3
CTRL_RTM Start and stop run-time meter 23 14 10 8 xx xx
4
READ_RTM Read run-time meter 29 18 12 10 xx xx
5
GADR_LGC Find logical address of a channel
Rack 0
38 23 15 13 xx xx
internal DP 51 31 21 18 xx xx
6
RD_SINFO Read start information of current OB 33 20 14 11 xx xx
7 DP_PRAL Trigger a process interrupt at the DP
master
First call
275 170 113 106 –– ––
Intermediate call 25 15 10 8 -- --
Last call 25 15 10 8 -- --
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