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4.3.1.1.4.7 Failure Transfer
The controller will enter failure mode as one of the following conditions occurs.
SB1E Error occurs ( due to the input 1 sensor break or input 1 current below
1mA,if 4-20 mA is selected or input 1 voltage below 0.25V if 1-5 V is selected ), if
PV1, P1-2 or P2-1 is selected for PVMD or PV1 is selected for SPMD.
SB2E Error occurs ( due to the input 2 sensor break or input 2 current below
1mA,if 4-20 mA is selected or input 2 voltage below 0.25V if 1-5 V is selected ), if
PV2, P1-2 or P2-1 is selected for PVMD or PV2 is selected for SPMD.
ADER Error occurs due to the A-D converter of the controller fails.
The output 1 and output 2 will perform the function as one of the following conditions occurs.
During power starts (within 2.5 seconds).
The controller enters the failure mode.
The controller enters the manual mode.
The controller enters the calibration mode.
Output 1 Failure Transfer, if activated, will perform
If output 1 is configured as proportional control (PB1≠0), and BPLS selected for
O1FT, then output 1 will perform bumpless transfer. Thereafter the previous
averaging value of MV1 will be used for controlling output 1.
If output 1 is configured as proportional control (PB1 ≠ 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.
If output 1 is configured as ON-OFF control (PB1 = 0), then output 1 will be driven
OFF if O1FN selects REVR and be driven ON if O1FN selects DIRT.
If output 1 is configured as ON-OFF control (PB1=0), then output 1 will be driven
OFF if O1FN selects REVR and be driven ON if O1FN selects DIRT.
Output 2 Failure Transfer, if activated, will perform
If OUT2 selects COOL, and BPLS is selected for O1FT, then output 2 will perform
bumpless transfer. Thereafter the previous averaging value of MV2 will be used for
controlling output 2.
If OUT2 selects COOL, and a value of 0 to 100.0 % is set for O2FT, then output 2
will perform failure transfer. Thereafter the value of O1FT will be used for
controlling output 2.
Alarm 1 Failure Transfer is activated as the controller enters failure mode. Thereafter the
alarm 1 will transfer to the ON or OFF state preset by A1FT.
Exception: If Loop Break (LB) alarm or sensor Break (SENB) alarm is configured for
A1FN, the alarm 1 will be switched to ON state independent of the setting of A1FT. If Dwell Timer
(TIMR) is configured for A1FN, the alarm 1 will not perform failure transfer.
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