Oldham MX62, Installation And Utilisation Manual

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3.2. Connecting Status
Upon switch-on or directly after voltage cutoff, alarms are suppressed for 1 to
10 minutes, depending on the type of transducer (setting via software Config-
Pro).
Ü Ü
As many transducers signal undefined values after switch-on, this mode
eliminates any false alarms.
During this function, the green LEDs for ‘power’ and the yellow LEDs for
‘fault’ of the respective channels are blinking. The LED for ‘service’ (system
information) is also blinking. Normal operation follows the connecting status.
3.3. Normal Operation
This mode directly follows the connecting status. During normal operation, re-
dundant measuring is carried out by both controllers of the controller module.
The values measured are allocated to the respect-ive status indication for each
channel shown by the LEDs for channel information. In addition, status indica-
tion is available via relays, analog outputs and LCD. The green LED for ‘power’
signals if a channel is switched on.
3.3.1. Normal Status
Only the green LED for ‘power’ is on. The measuring signal lies within the
measuring range of 4-20mA and below the set alarm
levels.
Ü Ü
In case an LCD module is used, the green LED for ‘power’ is blinking as
soon as the respective channel is shown on the LCD display.
3.3.2. Channel Malfunction
Should channel malfunction be signalled, the measuring signal has either fallen
below 2mA or exceeded 24.5mA. Channel malfunction could, for example,
mean interruption or short circuit of the signalling line. The transducer may also
be defective. This signal is not latching. (see 3.7 Measures against Faults)