How to generate the Channel Error in DI880 Module ?
Why i need to generate the Channel Error because,
During initial stage, there was no hardware filter, so there were some channel error for DI880 modules.
Later during commissioning phase, they have applied the Hardware filter to all.
So these channel error are still there.
Now the system is handed over and plant is running.
Currently the Hardware filter is OFF and there is no channel Error, for the DI880 channels , still there is channel error because it were not cleared before filtered were applied.
Now i think only way to clear this alarms is to generate Channel Error for the spare channel available and make it normal to remove those alarms.
I tried to create channel error in the test Lab System by lopping B1 and A1 terminal (TU843) for the DI880 module, it did not create Channel Error,
Same i tried in the DI840 (TU843) module, it is generating the Channel Error.
May be DI880 is not generating channel error, because Current limited sensor power supplies that are supplied by DI880.
As per Manual below it should generate channel error for short circuit..
How to generate the same ?
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