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How to Use the Input Signals (Assigned Terminals
RL, RM, RH, STR, SQ)
1
INSTALLATION AND WIRING
1.9 How to Use the Input Signals (Assigned Terminals RL, RM,
RH, STR, SQ)
1.9.1 Multi-speed setting (RL, RM, RH signals):
Pr. 60 to Pr. 63, Pr. 65,
Pr. 505 setting
"0, 1, 2"
• By entering frequency commands into the RL, RM and RH signals and turning on/off
the corresponding signals, you can perform multi-speed operation (three speeds).
(For details, refer to page 17.)
1.9.2 Output shut-off (MRS signal):
Pr. 60 to Pr. 63, Pr. 65, Pr. 505 setting
"6"
Short the output stop terminal MRS-SD during inverter output to cause the inverter to
immediately stop the output. Open terminals MRS-SD to resume operation in about
10ms. Terminal MRS may be used as described below:
1.9.3 External thermal relay input:
Pr. 60 to Pr. 63, Pr. 65, Pr. 505 setting
"7"
These terminals can be
changed in function by
setting Pr. 60 to Pr. 63, Pr. 65,
Pr. 505.
Pr. 60 "RL terminal function selection"
Page 68
Pr. 61 "RM terminal function selection"
Pr. 62 "RH terminal function selection"
Pr. 63 "STR terminal function selection"
Pr. 65 "STF terminal function selection"
Pr. 505 "SQ terminal function selection"
(1) To stop the motor by
mechanical brake (e.g.
electromagnetic brake)
Terminals MRS-SD must be
shorted when the mechanical
brake is operated and be opened
before motor restart.
(2) To provide interlock to disable
operation by the inverter
After MRS-SD have been shorted,
the inverter cannot be operated if
the start signal is given to the
inverter.
(3) To coast the motor to stop
The motor is decelerated according to the preset deceleration time and is stopped
by operating the DC injection brake at 3Hz or less. By using terminal MRS, the
motor is coasted to a stop.
When the external thermal relay or thermal relay built in
the motor (e.g. thermal protector) is actuated, the
inverter output is shut off and an alarm signal is given to
keep the motor stopped to protect the motor from
overheat. If the thermal relay contact is reset, the motor
is not restarted unless the reset terminal RES-SD are
shorted for more than 0.1s and then opened or power-on
reset is performed.
The function may therefore be used as an external
emergency stop signal input.
0.5Hz
ON
ON
Output frequency
Motor coasted
to stop
Pr. 13
"starting
frequency"
Across
MRS -SD
A
cross STF
(
STR)-SD
U
V
W
OH
SD
IM
Inverter
Thermal relay
Motor