Hb: Holdback
Holdback consists of a value and a type. If the measured
value lags behind the setpoint by an undesirable amount
during a ramp or dwell, the holdback feature can be used
to freeze the program at its current state (the HOLD light
will flash). The program will resume when the error comes
within the holdback value.
OFF: holdback is disabled.
Lo (Deviation Low Holdback): holds the program back
when process variable deviates below the setpoint by
more than the holdback value.
Hi (Deviation High Holdback): holds the program back
when process variable deviates above the setpoint by
more than the holdback value.
bAnd (Deviation Band Holdback): combines the fea-
tures of the high and low deviation holdback in that it
holds the program back when the process variable devi-
ates above or below the setpoint by more than the hold-
back value.
To set the holdback type:
1. Press the PAGE button until you reach the pro-
gram list (ProG LiSt).
2. Press the SCROLL button until display reads,
“Hb.”
3. Press the UP or DOWN button to toggle
between “bAnd, Hi, Lo and OFF.”
Hb U: Holdback Value
To set the holdback value:
1. Press the PAGE button until you reach the pro-
gram list (ProG LiSt).
2. Press the SCROLL button until display reads,
“Hb.U.”
3. Press the UP or DOWN button to enter a hold-
back value.
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8 SEGMENT P
ROGRAMMABLE MODEL W
/OTP
Note
The value set in this parameter is
always for the entire program.
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