9-7
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
A timer module is mounted at slot 5 (module address 5.0). A time of 270 s is
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.
Terminal Connections
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.
STL Explanation
A I 0.0
AN I 5.0
A F 65.0
S Q 4.0
A I 5.0
= F 65.0
AN I 0.0
R Q 4.0
A I 5.2
The timer must not be scanned in the program scan
cycle in which it was enabled since the CPU would
not receive the acknowledgement that the timer had
started until one program scan later.
If flag 65.0 is 1 and the timer has run down (AN I
5.0), output 4.0 is set to 1.
If the “Timer started” message has been sent to the
CPU, the flag is set.
If I 0.0 is 0, the lamp is switched off.
The timer is started if I 0.0 is 1.
Typical Application
as On–Delay Timer
Function Modules
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