9.2 Details of Function Codes
9-35
Chap. 9 FUNCTION CODES
Enable 3-wire operation--(HLD)
(Function code data = 6)㩷
Digital input signal (HLD) may self-hold
the forward (FWD)/reverse (REV) run
commands given at the external signal
input terminals to enable 3-wire inverter
operation.
Shorting the circuit between the
(HLD)-assigned terminal and terminal
[CM] will self-hold the (FWD) or (REV)
command. Opening the circuit will
release the hold.
If (HLD) is not assigned to any terminal,
the inverter runs in 2-wire operation
using (FWD) and (REV).
Coast to a stop--(BX)
(Function code data = 7)㩷
Shorting the circuit between the
(BX)-assigned terminal and terminal
[CM] will immediately shut down the
inverter output so that the motor will
coast to a stop without issuing any
alarms.
Reset alarm--(RST)
(Function code data = 8)㩷
When the protective function has been activated (the inverter is in Alarm mode), shorting the
circuit between the (RST)-assigned terminal and terminal [CM] will reset the alarm output on
terminals [Y1] and [30A/B/C]. Opening the circuit will release all the alarm indications to
restart operation. Allow 10 ms or more for the short-circuit time.
(RST) should be kept OFF for normal inverter operation.
Enable external alarm trip--(THR)
(Function code data = 9)㩷
When the motor is running, opening the circuit between the (THR)-assigned terminal and
terminal [CM] will immediately shut down the inverter output and issue the alarm "0H2." The
motor will coast to a stop.
This signal will be self-held inside the inverter until the key is pressed to reset it or any other
reset action is taken. If (THR) is not assigned to any terminal, the inverter interprets this as
(THR) always being ON.
Use this function to protect the external-braking resistor from overheating.
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