Operation Diagnosis
218
9.3
Out-of-band Signaling
UM Basic Configuration L3P
Release
7.1
12/2011
9.3 Out-of-band Signaling
The signal contact is used to control external devices and monitor the
operation of the device. Function monitoring enables you to perform remote
diagnostics.
The device reports the operating status via a break in the potential-free signal
contact (relay contact, closed circuit):
Incorrect supply voltage
- at least one of the 2 supply voltages is not operating,
- the internal supply voltage is not operating.
The temperature threshold has been exceeded or has not been reached.
The removal of a module (for modular devices).
The removal of the ACA.
The configuration on the ACA does not match that in the device.
The interruption of the connection at at least one port. In the Basic
Settings:Port Configuration menu, you define which ports the
device signals if the connection is down (see on page 82 “Displaying
detected connection errors”). On delivery, there is no link monitoring.
Event in the ring redundancy:
Loss of the redundancy (in ring manager mode). On delivery, there is no
ring redundancy monitoring.
Event in the ring/network coupling:
Loss of the redundancy. On delivery, there is no ring redundancy
monitoring.
The following conditions are also reported by the device in standby mode:
– Defective link status of the control line
– Partner device is in standby mode
Failure of a fan (MACH 4000).
Select the corresponding entries to decide which events the device status
includes.
Note: With a non-redundant voltage supply, the device reports the absence
of a supply voltage. If you do not want this message to be displayed, feed the
supply voltage over both inputs or switch off the monitoring (see on page 219
“Monitoring the Device Status via the Signal Contact”).
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