Mitsubishi Electric FR-A700 Instruction Manual page 770

Measurements on the main circuit
Item
Frequency
setting signal
Frequency set-
ting power
supply
Frequency
meter signal
Start signal
Select signal
Reset
Output stop
Alarm signal
Tab. 8-7: Measuring Points and Instruments (2)
Use an FFT to measure the output voltage accurately. A tester or general measuring
instrument cannot measure accurately.
When the carrier frequency exceeds 5 kHz, do not use this instrument since using it may
increase eddy-current losses produced in metal parts inside the instrument, leading to
burnout. If the wiring length between the inverter and motor is long, the instrument and CT
may generate heat due to line-to-line leakage current.
When the setting of Pr. 195 "ABC1 terminal function selection" is positive logic.
8 - 18
Measuring
Measuring Point
Instrument
Across 2, 4 (positive) Moving-coil type
and 5 (Tester and such
may be used)
Across 1 (positive)
(Internal resist-
and 5
ance: 50kΩ or
larger)
Across 10 (positive)
and 5
Across 10E (positive)
and 5
Across CA (positive)
and 5
Across AM (positive)
and 5
Across STF,
STR, RH, RM, RL,
JOG, RT, AU, STOP,
CS and SD (0V)
Across RES-SD
(0V)
Across MRS-SD
(0V)
Across A1-C1 and Moving-coil type
B1-C1 (such as tester)
Maintenance and inspection
Remarks (Reference Measurement Value)
0–10 V DC, 4–20 mA
0–±5 V DC, 0–±10 V DC
5.2 V DC
10 V DC
About 20mA at maximum frequency
Approximately 10V DC at maximum
frequency (without frequency meter)
When open: 20 to 30 V DC
ON voltage: 1 V or less
Continuity check
Normal
Across A1-C1 Discontinuity
Across B1-C1 Continuity
"5" is
common
"SD" is
common
(source
logic)
Abnormal
Continuity
Discontinuity