AC70 VC CONTROL FREQUENCY INVERTER MANUAL
FUNCTION PARAMETER DETAILED SPECIFICATION
112
Sleep threshold value:
This parameter use as a standard value for adjusting system if go to sleep mode when no
need working. It is that inverter always standby for sleep detecting, if PID feedback value higher than or equal to
PID given setting value is detected, and try to keep holding for a while in setting value around, inverter will start
sleep detecting. If the feedback value higher than sleep threshold value during the sleep detecting mode, inverter
will reduce the output frequency to lower limit frequency, and keep outputting lower limit frequency for a while, and
then reduce to 0Hz, go into sleep mode. If feedback value lower to sleep threshold during above process, sleep
detecting will be disable, go back to PID adjusting working. Smaller setting of this parameter, system will go to sleep
mode easier. When it is set for 100.0%, the system will not go to sleep mode.
This parameter is defined as percentage of PID feedback value to sensor maximum measuring range account for.
This function only is enabled in constant pressure PID control.
H-26 Alarm upper limit value
Range: Alarm lower limit value-100.0%
Default: 100.0%
H-27 Alarm lower limit value
Range: 0.0%-Alarm upper limit value
Default: 0.0%
While PID feedback reaches or exceeds the setting value, if any output terminals
[F-30-F-32]
is set as 15, (PID
feedback value upper limit alarming), it outputs alarm signal; This parameter is defined as percentage of the
maximum measuring range of the sensor that the PID feedback value accounts for.
While PID feedback reaches or under the setting value, if any output terminals
[F-30-F-32]
is set as 16, (PID
feedback quantity upper limit alarming), it outputs reaching signal; This parameter is defined as percentage of the
largest range of the sensor that the PID feedback quantity accounts for.
This function only is enabled in constant pressure PID control.
H-28 Sensor disconnection detection
Range: 0.0%-20.0%
Default: 0.0%
H-29
Sensor disconnection alarm
operation selection
Range: 0,1
Default: 0
When the frequency inverter is in the PID control mode, this function is valid; If the detection feedback signal is less
than
[H-28]
, the sensor is deemed to be open circuit. At this moment ,if any one of output terminal
[F-30-F-32]
is set
as‘17’ (sensor disconnect), the output signal is valid; This parameter is defined as the percentage of the sensor
maximum range that the feedback signal accounts for.
Sensor disconnection alarm running selection
0:Continuous operation
1:Close down
In the process of PID adjustment, while system detects sensor open circuit, this parameter is used to choose
whether frequency inverter stop working. If choose working on ,frequency inverter will cancel closed-loop control,
with PID given values as frequency output; If choose close down, when the system detects the alarm which is
mentioned above, the inverter will stop output and display the malfunction information immediately.
The feedback sensor malfunction is displayed as "SEn". When it detects the PID feedback quantity is greater than
the setting of
[H-28]
, the feedback sensor fault is deemed to be vanish, and system restores PID closed-loop
control.
H-30 Upper limit threshold
Range: lower limit threshold-100.0%
Default: 100.0%
H-31 Lower limit threshold
Range:0.0%-upper limit threshold
Default: 0.0%
This parameter will limit PID given during upper limit threshold and lower limit threshold range. This parameters is
defined the ratio of upper limit threshold, lower limit threshold to maximum measuring range. This function only is
enabled in constant pressure PID control.
H-32 Program running mode
Range:0-5
Default: 0
0. Single cycle running (time by second)
While receiving running instructions, the frequency inverter starts operation from the 1st step speed and direction.