Failure Transfer - Brainchild P41 User Manual

3 -9 Failure Transfer

3 -9 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 ( ie. HTPC, CTPC,
HLIN, or CLIN selected for OUT1, ), 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, 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 ( ie. HONF or CONF is
selected for OUT1 ), 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 CTPC or CLIN, and BPLS is selected for O2FT,
then output 2 will perform bumpless transfer. Thereafter the previous
averaging value of MV2 will be used for controlling output 2.
2. If OUT2 is configured as CTPC or CLIN, and a value of 0 to 100.0 %
is set for O2FT, then output 2 will perform failure transfer. Thereafter the
value of O2FT will be used for controlling output 2.
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
to on state if ON is set for O2FT.
OUT3 and OUT4 Failure Transfer OUT3 and OUT4 Failure Transfer is activated as the controller enters
failure mode. Thereafter the alarm will transfer to the ON or OFF state
which is determined
58
failure mode failure mode
by the set value of O3FT or O4FT..
UM0P411A
as one of the following conditions
failure transfer failure transfer function as