Mitsubishi Electric FR-D720S SC EC Instruction Manual page 483

Maintenance and inspection
Item
Frequency
setting signal
Frequency set-
ting power
supply
Frequency
meter signal
Start signal
Select signal
Fault signal
Tab. 8-6: Measuring Points and Instruments of the control circuit
When the setting of Pr. 192 "ABC terminal function selection" is positive logic.
FR-D700 SC EC
Measuring
Measuring Point
Instrument
Across 2 (positive) Moving-coil type
and 5 (Tester and such
may be used)
Across 4 (positive)
(Internal resist-
and 5
ance: 50kΩ or
larger)
Across 10 (positive)
and 5
Across AM (positive)
and 5
Across STF, STR,
RH, RM, RL and PC
(positive)
Across Moving-coil type
A-C and B-C (such as tester)
Measurements on the main circuit
Remarks (Reference Measurement Value)
0 to 10V DC, 4 to 20mA
5.2V DC
Approximately 10V DC at maximum
frequency (without frequency meter)
When open: 20 to 30V DC
ON voltage: 1V or less
Continuity check
Normal
Across A-C Discontinuity
Across B-C Continuity
"5" is
common
"PC" is
common
Abnormal
Continuity
Discontinuity
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