Hitachi NES1-002LB, Quick Reference Manual

Page: 94 / 295

Chapter 7 Explanation of Functions
7 - 19
7.4.6 FM terminal
[C027]
You can monitor the inverter output frequency and output current via the FM terminal on the control circuit
terminal block. The FM terminal is a pulse output terminal.
(1) FM siginal selection
Select the signal to be output from the FM terminal among those shown below.
If you select "03" (digital output frequency) or “08”(Digital current monitoring), connect a digital frequency
counter to the FM terminal. To monitor other output signals, use an analog meter.
Item Data Description Full-scale value
C027
00 Output frequency (See example 1.) 0 to maximum frequency (Hz)
01 Output current (See example 1.) 0 to 200%
03
Digital output frequency (See example 2.)
*1)
0 to maximum frequency (Hz)
04 Output voltage (See example 1.)
0 to 133% (75% of full scale is equivalent
to 100%)
05 Input power (See example 1.) 0 to 200%
06
Electronic thermal overload
(See example 1.)
0 to 100%
07 LAD frequency (See example 1.) 0 to maximum frequency (Hz)
08 Digital current monitoring (See example 2.) Refer to (3)
10 Heat sink temperature (See example 1.)
0ºC to 200ºC (0ºC is output when the
motor temperature is 0ºC or less.)
(Example 1) When 00, 01, 04, 05, 06, 07, or 10 is slected
Cycle (T): Fixed (6.4 ms)
Duty (t/T): Varied
(Example 2) When 03 or 08 us selected
Cycle (T): Varied
Duty (t/T): Fixed (1/2)
*1) In case of C027=03, when b086 (frequency scaling conversion factor) is set, the value converted by gain is
displayed.
(2) FM terminal analog meter adjustment
Adjust the inverter output gain for the external meter connected to the FM terminal.
Item Function code Range of data Description
[FM] terminal analog meter adjustment
for “C027 = 00,01,04,05,06,07,10”
C105 50. to 200. (%)
Setting of the gain for
FM monitoring
(3) Digital current monitoring
If the output current matches the digital current monitor reference value (C030), the FM terminal will output
a signal indicating 1,440 Hz.
Item Function code Range of data Description
Digital current monitor reference value C030
"0.2 x rated current" to
"2.0 x rated current" (A) Setting of the current for
1,440 Hz output
t
T
t
T