The DO select register:
AssociatedDO1 register bit0~bit8 correspond to the first to ninth inequation.
Bit(n)=0, DO1 do not associate with the nth inequation
Bit(n)=0, DO1 associate with the nth inequation
AssociatedDO2 register bit0~bit8 correspond to the first to ninth inequation.
Bit(n)=0, DO2 do not associate with the nth inequation
Bit(n)=0, DO2 associate with the nth inequation
Example:
If current I1 goes over the up limit and time limit 15 Seconds, trigger the over
limit alarm record and DO1 output. The CT ratio of the current I1 is 200:5. The up
limit of current I1 is set to be 180A. The setting of the registers is as following.
Enable the inequation1: EN_INEQU register bit(0)=1
The current I1 is number 9 in Table3.3. The setting of the Var1 is 9.
The relation of real current and the data stored in register is,
Real current=(data in registerxCT1/5)/1000
The CT1 is 200 and up limit of current is 180A, then the data in register is
4500. The setting of the Ref1 is 4500.
Time limit is 15 Seconds and the one digit is 300ms, then the setting of Limit_t1
is 50.
As it is the up limit, the INQU_Sign1 should be 1.
Use DO1as alarm signal output, then the bit0 of the associatedDO1 should be
1.
The output mode of DO should be set alarming through front panel or
communication.
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