The test mode can be activated using the WHMI via the front port. The green Ready LED is flashing to indicate that the test mode is activated. By default, the test mode can only be changed from the WHMI via the front port. Activation by remote client is possible, see the technical manual.
Note: The Ready LED also flashes if the merging unit detects a diagnostic failure. Check the test mode setting and the merging unit's IRF alarm contact status to find the reason for the failure.
The test mode is useful for simulated testing of functions and outputs without providing current inputs.
Note: If the test mode is not cancelled, it remains on and the Ready LED remains flashing.