GE AF-300 P11 User Manual page 90

H16 Auto-restart (OPR command selfhold time)
H 1 6 S E L F H O L D
Setting range: 0.0 to 30.0 seconds, 999
Since the power to an external operation circuit (relay
sequence) and the main power to the drive is generally cut
off at a power failure, the operation command issued to
the drive is also cut off. This function sets the time an
operation command is to be held in the drive. If a power
failure lasts beyond the self-hold time, power-off is
assumed, automatic restart mode is released, and the
drive starts operation at normal mode when power is
applied again. (This time can be considered to be the
allowable power failure time.)
If H16 = 999, an operation command will be held until
control power in the drive is established or until the main
circuit DC voltage is about 0.
H19 Active drive
H 1 9 A U T R E D
Setting range: 0: Inactive
1: Active
This function automatically extends accelerating time by
60 seconds or longer to prevent an inverter trip resulting
from a temperature rise in the inverter due to overcurrent.
(If the active drive function is activated, the acceleration
time will be three times the selected time.)
H20 PID control (mode select)
H 2 0 P I D M O D E
Setting range: 0: No operation
1: Normal operation
2: Inverse operation
PID control detects the amount of feedback from a sensor
and compares it with the target value (e.g., reference
temperature). If the values differ, this function produces
an output to eliminate the deviation. In other words, this
control matches the feedback amount with the target
value.
This function can be used for flow control, pressure
control, temperature control, and other process controls.
Forward or reverse operations can be selected for PID
controller output. This enables motor revolutions to be
faster or slower according to PID controller output.
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