BENSHAW RSi H2 Series - Keypad Loss and Speed Reference Loss

Parameter Descriptions
195
890053-00-02
5.8.4 PRT-11 Keypad Loss and Speed Reference Loss
When setting operating speed using an analog input, a pulsed input, through communications or
the keypad, the inverter can detect a keypad loss (PRT-11) and/or a speed reference loss based
on the settings of the following parameters.
A digital output can be used to provide a signal when communications with the keypad are lost and/or
the speed reference is lost. Set OUT-31~35 or OUT-36 to ‘24 (Lost Keypad)’ or ‘13 (Lost Command)’.
Group
Code
Name
LCD Display
Parameter Setting
Setting range
Unit
PRT
11
Keypad command loss
operation mode
Lost KPD
Mode
0
None
0
None
-
1
Warning
2
Free-Run
3
Dec
12
Speed command loss
operation mode
Lost Cmd
Mode
1
Free-Run
-
-
13
Time to determine
speed command loss
Lost Cmd
Time
1.0
0.1–120.0
sec
14
Operation frequency
at speed command
loss
Lost Preset F
0.00
Start frequency–
Max. frequency
Hz
15
Analog input loss
decision level
AI Lost Level
0
Half of x1
-
OUT
31~35
Multi-function Relay
1–5
Relay 1–5
13
Lost
Command
-
-
36
Multi-function output 1
Q1 Define
Keypad Loss and Speed Reference Loss Setting Details
Code
Description
PRT-11
Lost KPD Mode
Keypad Loss - Set the inverters response to a loss of keypad
communications with the inverter.
Setting
Function
0
None
The speed command immediately becomes the
operation frequency without any protection function.
1
Warning
Set OUT-31~35 or OUT-36 to 24: Lost keypad. The
inverter outputs a warning signal when abnormal
operating conditions arise.
2
Free-Run
The inverter blocks output. The motor performs in
free-run condition.
3
Dec
The motor decelerates and then stops at the time set at
PRT-07 (Trip Dec Time).
PRT-12
Lost Cmd Mode
Speed Reference Loss - The inverter responds to a speed reference loss
based on the setting of PRT-12.
Setting
Function
0
None
The speed reference immediately becomes the
operating frequency without any protection function.
1
Free-Run
The inverter blocks the output. The motor coasts to a
stop.
2
Dec
The inverter decelerates the motor and then stops at the
time set at PRT-07 (Trip Dec Time).
3
Hold Input
The inverter calculates the average input value for