Apc DP300E User Manual download pdf (Page 23)

23User Guide Silcon DP300E Series 480V 120-160kVA

7OA0003 US rev. 03

Parallel operation alarms.

General.

If alarms concerning the parallel operation communication arise all parallel opera-

tion functions being controlled by the advanced management will be inactive. If the

advanced parallel operation functions are inactive, “only” the simple hardware

control of parallel operation, which controls load sharing, operation mode, etc., is

left.

Alarm texts conc. parallel operation.

In case of fault in parallel operation the following alarm will be active in the alarm

stack:

• “Communication to parallel IF lost”.

Other reasons for parallel operation alarm.

• When a system is isolated (PSU OFF) due to service this fault will as well arise

on the systems still operating. The reason is that the isolated system is no longer

to be found (active) in the parallel system. The fault can only be deleted by

turning on the PSU or by reprogramming the station addresses on all systems so

that the sequence is: 1 to max_number_system.

• Defective parallel cable.

• Wrong programming of “Station number”.

• Wrong programming of “Highest station number”.

• Inrush distortion on serial bus being used for communication.

Programming Parameters

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Apc DP300E User Manual Page 23