How can an alarm be displayed on a RS485 network (bus terminal topology)?

FAQ #101544

When an alarm arises and the display (e.g. a PCD7.D23x) is connected on an RS 485 bus, the screen of the terminal can't be forced in order to display the alarm contained in the buffer.

 

Symptom
When an alarm arises and the display (e.g. a PCD7.D23x) is connected on an RS 485 bus, the screen of the terminal can't be forced in order to display the alarm contained in the buffer.

Reason
This restriction is due to the network configuration; several displays can be connected on the network but only one can communicate at once with the PLC (only one display can be operated). All other dispays are not operatable (they display "Busy menu")! While the displays are in a standby mode an alarm can't be displayed as "popup" on all displays!

Solution
In order to inform the operator that an alarm is present it is possible to display the general alarm flag on the standy menu.
It has to be configured as shown in the following screenshot:
image

 

Related Files:

Categories

PCD7 / D23x

Last update: 25.05.2015 04:19

First release: 20.12.2010 09:09

Views: 28546

The requested software / document is no longer marketed by Saia-Burgess Controls AG and without technical support. It is an older software version which can be operated only on certain now no longer commercially available products.

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