Siemens SIMATIC S5-90U System Manual page 477

S5-90U/S5-95U
Function
Simulator modules are 8-channel modules that can simulate digital input signals and display output
signals.
The type of module to be simulated (input or output) is selected by means of a switch on the rear of
the module and displayed by two LEDs on the front panel.
The module cannot simulate interrupt inputs.
Installation
The simulator module is inserted into a bus unit like any other input or output module (see
Chapter 3). The module does not have a coding key and can therefore replace any digital module.
The coding element on the bus unit does not have to be readjusted.
Wiring
There is no electrical connection between the module and the terminal block. It can therefore be
inserted into slots that have already been wired and connected to the power supply.
Addressing
A simulator module is addressed like a 8-channel digital module (channels 0 to 7).
Scan
(examples)
Figure 16-4. Scanning the Simulator Module as a Digital Input
Typical Application
The CPU is in the "RUN" mode, the green LED is lit but the PLC is malfunctioning. You have also
discovered that the fault must be in a particular I/O module. If the module has no fault indicator,
check to see if:
• the power supply is connected
• the bus connections and interface modules are plugged in correctly
Then, try to access the module via the process image ("STATUS" or "STATUS VAR").
procedure is not successful, replace the module with the simulator module.
check with the "STATUS" or "STATUS VAR" function. If the simulator performs, the input/output
module you replaced is defective.
EWA 4NEB 812 6115-02b
A I 0 . 0
O Q 1 . 1
Channel number
Slot address
Function Modules
Channel "0"
Channel "1"
Perform a second
If this
16-9