S5-100U Function Modules
Function
The module contains two pulse timers. While a timer runs, the LED of the respective channel is lit
and a “1” is reported to the CPU.
The pulse duration is preselected with the time range selector “x 0.3 s / x 3 s / x 30 s” in a definite
range and then set to the exact value by means of a potentiometer on the front panel. This selector
has scale divisions to simplify setting.
(time value=time range x scale value)
Example: Time range: x 3 s
Scale value: 7
Set time: 7 x 3 s=21 s
Installation
The counter is inserted into a bus unit like any other input or output module (see chapter 3).
Wiring
No wiring is required.
Addressing
A timer module is addressed like a two-channel digital module (channel “0” or “1”).
The timer module is addressed like a digital output module for starting, resetting, or interrupting the
pulse. The signal status is scanned like a digital input module.
Figure 15-2. Scanning the Timer Module
Starting the pulse S Q x . 0 Channel “0”
S Q x . 1 Channel “1”
Interrupt/ R Q x . 0
Reset R Q x . 1
Scan A I x . 0
“1” = timer running A I x . 1
Channel number
Slot address
EWA 4NEB 812 6120-02
15-5
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