Hitachi WJ C1 Series User Manual

Chapter 9 Inverter Functions
9-2-13
9.2.8 Setting Frequency Command by Pulse Input
 How to set the frequency command using an open collector pulse input?
 To set the output frequency command using a pulse input from the [PLA] terminal, set the
"Frequency input source selection [A001]
*1
" to "Pulse input (06)". At the same time, set the
"Pulse input, target function selection [P003]" to "Pulse input frequency command (00)" and the
"Simple positioning selection [P012]" to "Simple positioning disabled (00)".
 Set the input pulse frequency, that makes the frequency command equivalent to the "Maximum
frequency [A004]
*1
", in the "Pulse frequency scale [P055]".
 The pulse input value can be monitored using "Pulse input [PLA] monitor [d133]".
 The analog input start/end function cannot be used. To limit the pulse input frequency
command, set the "Pulse frequency bias value [P057]", the "Pulse upper frequency detection
level [P058]", and the "Pulse lower frequency detection level [P059]".
 Trying to stop the inverter by setting the pulse input frequency to 0 Hz may cause the
deceleration to stall. In such a case, turn off the RUN command to stop the inverter.
 If the pulse input frequency falls to or below the "Pulse lower frequency detection level [P059]",
it is treated as if the input is set to 0 Hz.
 If the "Pulse lower frequency detection level [P059]" setting is too high, start-up may be too
slow.
Code
Item
Description
Data
[d133]
Pulse input [PLA] monitor
Monitors the pulse frequency from the [PLA]
terminal as a percentage with [P055]
indicating a value of 100%. This monitor
continuously operates regardless of all other
settings.
0.00 to 100.00 (%)
[A001]
*1
Frequency input source
selection
Used to set the pulse input as the frequency
command input source.
06
[P003]
Pulse input, target
function selection
Used to set the pulse input as the frequency
command input source.
00
[P012]
Simple positioning
selection
Used to set the pulse input as the frequency
command input source.
00
[P055]
Pulse frequency scale
Enter the pulse frequency that is equivalent to
the maximum frequency.
1.0 to 32.0 (kHz)
[P056]
Pulse frequency filter time
constant
Filters the pulse frequency input.
0.01 to 2.00 (s)
[P057]
Pulse frequency bias
value
Applies a bias to the pulse frequency input.
-100 to 100 (%)
[P058]
Pulse upper frequency
detection level
Limits the output of the pulse frequency input.
0 to 100 (%)
[P059]
Pulse lower frequency
detection level
Sets the pulse value to 0.0% when the output
of the pulse frequency input falls to or below
the set lower limit.
0.01 to 20.00 (%)
◼ Pulse command frequency processing block diagram
*1. "2nd-motor control [SET]" target parameter. The second control parameter is also subject to setting.
Pulse frequency
acquisition
1+sT
1
×
Maximum
frequency
[A004]
*1
Frequency
command
Bias/Upper limit/Lower limit
Hz
%
Frequency command unit
Pulse frequency scale G
[P055] (1.0 to 32.0 kHz)
G
1
Filter time
constant T [P056]
(0.01 to 2.00 s)
%
100(%)
0(%)
100(%)
Input
Outp
ut
Upper limit [P058]
(0 to 100%)
Lower limit [P059]
(0.01 to 20.00%)
Bias [P057]
(-100 to +100%)
0(%)
[P058]
[P059]
Bias
Pulse input [PLA] monitor [d133]
(0.00 to 100.00%)
Q
A
!

Hitachi WJ C1 Series Specifications

General

Brand	Hitachi
Model	WJ C1 Series
Category	Inverter
Language	English