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Monitor display and monitor output signal
4
PARAMETERS
4.16.3 Reference of the terminal FM (pulse train output) and AM (analog voltage
output) (Pr. 55, Pr. 56, Pr. 291, Pr. 866, Pr. 867)
(1) Pulse train output of the terminal FM (Pr. 291)
• Two types of pulse train can be output to the terminal FM.
Two types of monitor output, pulse train output from the terminal FM and analog voltage output from the terminal
AM, are available. In addition, pulse train output by voltage output and by open collector output can be selected
for terminal FM.
Set the reference of the signal output from terminal FM and AM.
Parameter
Number
Name
Initial
Value
Setting Range Description
55 *
Frequency monitoring
reference
60Hz 0 to 400Hz
Set the full-scale value to output the output frequency
monitor value to terminal FM and AM.
56 *
Current monitoring
reference
Rated
inverter
current
55K or
lower
0 to
500A
Set the full-scale value to output the output current
monitor value to terminal FM and AM.
75K or
higher
0 to
3600A
291
Pulse train I/O
selection
0
Pulse train input Pulse train output
0 Terminal JOG FM output
1 Pulse train input FM output
10 Terminal JOG
High speed pulse train output (50%Duty)
11 Pulse train input
High speed pulse train output (50%Duty)
20 Terminal JOG
High speed pulse train output (ON
width is always same)
21 Pulse train input
High speed pulse train output (ON
width is always same)
100 Pulse train input
High speed pulse train output (ON
width is always same)
The inverter outputs the signal input
as pulse train as is
866 *
Torque monitoring
reference
150% 0 to 400%
Set the full-scale value to output the torque monitor value
to terminal FM and AM.
867 AM output filter 0.01s 0 to 5s Set the output filter of terminal AM.
* The above parameters allow its setting to be changed during operation in any operation mode even if "0" (initial value) is set in Pr.
77 Parameter write selection.
FM output circuit
• When Pr. 291 Pulse train I/O selection = "0 (initial value) or 1",
FM output is selected and pulse train with maximum of
8VDC 2400pulses/s is output.
The pulse width can be adjusted by calibration parameter C0
(Pr. 900) FM terminal calibration using the operation panel
and parameter unit.
• Output frequency, etc. of the inverter can be indicated by
connecting a DC ammeter of full-scale 1mA, digital indicator,
etc.
*1 Not needed when the operation panel (FR-DU07) or parameter unit (FR-PU04/FR-PU07) is used for calibration.
Use a calibration resistor when the indicator (frequency meter) needs to be calibrated by a neighboring device because the indicator is
located far from the inverter.
Note that the needle of the frequency meter may not deflect to full-scale when the calibration resistor is connected. In this case, use this
resistor and perform calibration of operation panel or parameter unit.
*2 The initial setting is 1mA full-scale and 1440 pulse/s terminal FM frequency at 60Hz.
Inverter
24V
2.2K
20K
3.3K
SD
FM
8VDC
T2
T1
Pulse width T1: Adjust using calibration parameter C0
Pulse cycle T2: Set with Pr. 55 (frequency monitor)
Set with Pr.56 (current monitor)
(Digital indicator)
(-)
1440 pulses/s(+)
FM
SD
Indicator
1mA full-scale
analog meter
(+)
1mA
FM
SD
Calibration
resistor
*1
(-)