Typical Application As On-Delay Timer - Siemens SIMATIC S5 ET 200U Manual

Typical Application
A timer module is mounted at slot 5 (module address 5.0). A time of 270 s is
as On–Delay Timer set on channel 0 of this module by means of the time–range selector and the
potentiometer. The timer is started when input 0.0 is 1. A lamp lights up (out-
put 4.0) when the timer has run down.
No process peripherals are connected to this module.
Unlike the internal timers, times can be set or modified using a timer mo-
dule without making any program modifications.
A
AN
A
S
A
=
AN
R
A
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
Terminal Connections
STL
The timer must not be scanned in the program scan
I 0.0
cycle in which it was enabled since the CPU would
I 5.0
not receive the acknowledgement that the timer had
F 65.0
Q 4.0 started until one program scan later.
If flag 65.0 is 1 and the timer has run down (AN I
I 5.0
5.0), output 4.0 is set to 1.
F 65.0
If the "Timer started" message has been sent to the
I 0.0
CPU, the flag is set.
Q 4.0
If I 0.0 is 0, the lamp is switched off.
I 5.2
The timer is started if I 0.0 is 1.
Function Modules
Explanation
9-7