Mitsubishi Electric FR-A700 Technical Manual page 87

1.4.26 Calibration of analog output (AM)
The terminal AM is factory-set to provide a 10VDC output
in the full-scale status of the corresponding monitor item.
[Calibration parameter C1 (Pr. 901)] allows the output voltage
ratios (gains) to be adjusted according to the meter scale.
Note that the maximum output voltage is 10VDC.
The analog output level can be calibrated by the operation
panel or parameter unit.
Terminal AM function selection can be set in [Pr. 158].
Since the terminal AM is not isolated from the control circuit
of the inverter, use a shielded cable of shorter than 30m.
Inverter
CPU
1.4.27 Control circuit common terminals (SD, 5, SE)
The terminals SD, 5, and SE are all common terminals (0V)
for I/O signals and are isolated from each other. Do not
earth (ground).
Avoid connecting the terminal SD and 5 and the terminal
SE and 5.
Terminal SD is a common terminal for the contact input
terminals (STF, STR, STOP, RH, RM, RL, JOG, RT, MRS,
RES, AU, CS) and frequency output signal (FM).
The open collector circuit is isolated from the internal
control circuit by photocoupler.
1.4.28 Signal inputs by contact-less switches
The contacted input terminals of the inverter (STF
STOP RH RM RL, JOG, RT, MRS, RES, AU, CS) can be
, , ,
controlled using a transistor instead of a contacted switch
as shown on the right.
(1) Electrical characteristics required for the
external transistor
1)I (collector current [10mA or more])
C
If the rating is small, the external transistor
may be damaged or the inverter input may
not be active.
2)V (open-time permissible collector-to-emitter
CEX
voltage [30V or more])
If the rating is small, the external transistor
may be damaged.
3)V (conduction time collector-to-emitter
CE(sat)
saturation voltage [3V or less])
If the saturation voltage is large, the inverter
input may not be active.
4)I (collector shut-off current (leakage current)
CEX
[100µA or less]
If the shut-off current is large, it may be
accidentally input to the inverter.
FM signal
AM
10VDC
5
common
A700 F700
(A700)(F700)
(1) Calibration of terminal AM
Calibrate the terminal AM in the following procedure.
1) Connect a 0-10VDC meter (frequency meter) to
across inverter terminals AM-5. (Note the polarity.
The terminal AM is positive.)
2) Refer to the monitor description list (page 345)
and set [Pr. 158].
When you selected the running frequency,
inverter output current or the like as monitor,
preset the running frequency or current value at
which the output signal will be 10V in [Pr. 55] or
[Pr. 56].
*1 When calibrating a monitor output signal, which
cannot adjust to a 100% value without an actual
load and a measurement equipment, set [Pr. 158 =
21] (reference voltage output) and make calibration.
10VDC is output from the terminal AM.
(common)
The terminal 5 is a common terminal for frequency setting
signal (terminal 2, 1 or 4) and analog output terminal AM. It
should be protected from external noise using a shielded or
twisted cable.
Terminal SE is a common terminal for the open collector
output terminal (RUN, SU, OL, IPF, FU). The contact input
circuit is isolated from the internal control circuit by
photocoupler.
common
(common)
STR
, ,
*1 When using an external transistor connected to an
external power supply, use terminal PC to prevent
malfunctions due to undesirable currents. (Refer to
page 60)
*2 Note that an SSR (solid-state relay) has a
relatively large leakage current at OFF time and it
may be accidentally input to the inverter.
80
SPECIFICATIONS
common
+24V
Ic 6mA
STF, etc
Inverter
SD
External signal input using transistor