Failure Transfer - Brainchild C21 User Manual

3 -10 Failure Transfer

3 -10 Failure Transfer
The controller will enter
occurs:
1. SBER SBER occurs due to the input sensor break or input current below
1mA if 4-20 mA is selected or input voltage below 0.25V if 1-5 V is
selected .
2. ADER ADER occurs due to the A-D converter of the controller fails.
The output 1 and output 2 will perform the
the controller enters failure mode.
Output 1 Failure Transfer, if activated, will perform : Output 1 Failure Transfer
1. If output 1 is configured as proportional control ( PB=0 ), and BPLS
is selected for O1FT, then output 1 will perform bumpless transfer.
Thereafter the previous averaging value of MV1 will be used for
controlling output 1.
2. If output 1 is configured as proportional control ( PB=0 ), and a
value of 0 to 100.0 % is set for O1FT, then output 1 will perform
failure transfer. Thereafter the value of O1FT will be used for
controlling output 1.
3. If output 1 is configured as ON-OFF control ( PB=0 ), then output 1
will transfer to off state if OFF is set for O1FT and transfer to on
state if ON is set for O1FT.
Output 2 Failure Transfer, if activated, will perform : Output 2 Failure Transfer, if activated, will perform :
1. If OUT2 is configured as COOL, and BPLS is selected for O2FT, 1. If OUT2 is configured as COOL, and BPLS is selected for O2FT,
then output 2 will perform bumpless transfer. Thereafter the previous then output 2 will perform bumpless transfer. Thereafter the previous
averaging value of MV2 will be used for controlling output 2. averaging value of MV2 will be used for controlling output 2.
2. If OUT2 is configured as COOL, and a value of 0 to 100.0 % is set 2. If OUT2 is configured as COOL, and a value of 0 to 100.0 % is set
for O2FT, then output 2 will perform failure transfer. Thereafter the for O2FT, then output 2 will perform failure transfer. Thereafter the
value of O2FT will be used for controlling output 2. value of O2FT will be used for controlling output 2.
3. If OUT2 is configured as alarm function, and OFF is set for O2FT, 3. If OUT2 is configured as alarm function, and OFF is set for O2FT,
then output 2 will transfer to off state, otherwise, output 2 will transfer then output 2 will transfer to off state, otherwise, output 2 will transfer
to on state if ON is set for O2FT. to on state if ON is set for O2FT.
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failure mode failure mode as one of the following conditions
UM0C911A
failure transfer failure transfer function as