Programming Parameters
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.
7OA0002 US rev. 04
User Guide Silcon DP300E Series 480V | 23 |