GE Industrial Solutions AF-300 G11 - Manual (Page 90)

5-37
Data subject to change without notice 7/07. © 2007 GE Drives
H16 Auto-restart (OPR command selfhold time)
H 1 6 S E L F H O L D T
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.
H18 Torque control
H 1 8 T R Q C T R L
This function controls motor torque according to a
command value.
Note: PG Option Card is required for this function
Operation
[Related Functions: E01 – E09 = 23]
0 Inactive (operation by frequency command)
Torque control active
A 0 to +10 V analog voltage input to Terminal 12 and
the direction of rotation (FWD or REV) are used for
the torque command value. 0 is used for 0 to -10V.
Torque control active
A -10 to +10V analog voltage input to Terminal 12 and
the direction of rotation (FWD or REV) are used for
the torque command value.
1
2
Value
The torque command value is +200% when the voltage at
Terminal 12 is +10V and is -200% when the voltage is -
10V.
Under torque control, the torque command value and
motor load determine the speed and direction of rotation.
When the torque is controlled, the upper frequency limit
refers to the lowest value among the maximum frequency,
the frequency limiter (upper limiter), and 120 Hz. Maintain
the frequency at min. 1/10 of the base frequency because
torque control performance deteriorates at lower frequen-
cies.
If the operation command goes off during a torque control
operation, the operation is switched to speed control and
the motor decelerates-to-stop. At this time, the torque
control function will not operate.
H19 Active drive
H 1 9 A U T R E D
Set value 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
Set value 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.