The controller pulses the digital outputs to detect the line short-circuits and open-circuits on the

lines connected to the digital inputs.   To do so, configure the Value [BOOL] -> system variable in

SILworX or the DO[01].  Value system signal in ELOP II Factory.   The variables for the pulsed

outputs must begin with channel 1 and reside in direct sequence, one after the other.

If the following faults occur, the FAULT LED located on the front plate of the controller blinks,

the inputs are set to low level and an (evaluable) error code is created:

Cross-circuit between two parallel wires.

Invalid connections of two lines (e.g., DO 2 to DI 3),

Earth fault on one wire (with earthed ground only).

Open-circuit or open contacts, i.e., including when one of the two EMERGENCY STOP

switches mentioned above has been engaged, the FAULT LED blinks and the error code is

created.

F3322

Safety-Related Digital Outputs

The controller is equipped with 8 digital outputs.  The state (HIGH, LOW) of each output is

signaled by an individual LED (HIGH, LOW).

At the maximum ambient temperature, the outputs 1… 3 and 5… 7 can be loaded with 0.5  A

each;  and outputs 4 and 8 can be loaded with 1 A or with 2 A at an ambient temperature of up

to 50 °C.

F3322

If an overload occurs, one or all digital outputs are switched off.  If the overload is removed, the

outputs are switched on again automatically, see Table 17.

The external wire of an output is not monitored, however, a detected short-circuit is signaled.

Reaction in the Event of a Fault

If the device detects a faulty signal on a digital output, the affected module output is set to the

safe (de-energized) state using the safety switches.

If a device fault occurs, all digital outputs are switched off.

In both cases, the devices activates the FAULT LED.

The error code allows the user to configure additional fault reactions in the user program.