Siemens CPU 412-1 User Manual

Timer Instructions
42
S7-400 Instruction List
A5E00267845-01
Timer Instructions
Starting or resetting a timer. The time value must be in ACCU1-L. The instructions are triggered by an edge transition in the RLO; that is,
when the status of the RLO has changed between two calls.
In-
Length
Execution Time in s
In-
struc-
Address
Description
Length
in
Execution Time in

s
struc-
tion
Address
ID
Description
in
Words
CPU 412 CPU 414 CPU 416 CPU 417
SP Tf
T [e]
Start timer as pulse on edge
change from “0” to “1”
1
1)
/2 0.2
0.2+
0.12
0.12+
0.08
0.08+
0.06
0.06+
Timer para. 2 0.2+ 0.12+ 0.08+ 0.06+
SE Tf
T [e]
Start timer as extended pulse on
edge change from “0” to “1”
1
1)
/2 0.2
0.2+
0.12
0.2+
0.08
0.08+
0.06
0.06+
Timer para. 2 024+ 0.12+ 0.08+ 0.06+
SD Tf
T [e]
Start timer as ON delay on edge
change from “0” to “1”
1
1)
/2 0.2
0.2+
0.12
0.12+
0.08
0.08+
0.06
0.06+
Timer para. 2 0.2+ 01.2+ 0.08+ 0.06+
Status word for SP, SE, SD BR CC1 CC0 OV OS OR STA RLO /FC
Instruction evaluates: – – – – – – – Yes –
Instruction affects: – – – – – 0 – – 0
+ Plus time required for loading the address of the instruction (see page 20)
1)
With direct instruction addressing Timer No.: 0 to 255

Siemens CPU 412-1 Specifications

General

Brand	Siemens
Model	CPU 412-1
Category	Computer Hardware
Language	English