Hitachi WJ Series User Manual page 395

Chapter 15
S3: Frequency command setting or frequency command is incorrect
!
Estimated cause (s) ▶
Frequency command is not
recognized.
The frequency command input
source is incorrect.
The frequency reference is set
to 0 Hz.
When the frequency command
is an analog or digital
command, the motor drives at
a value different from the input
command value.
"Forced operation [F-OP]"
input terminal or "Forced
terminal [F-TM]" input terminal
is ON.
Main circuit wiring is broken or
incorrect.
Settings other than the above
or wiring etc. are incorrect.
S4: Frequency output shut-off/limit function is working
!
Estimated cause (s) ▶
"Reset [RS]" input terminal is
ON.
"Free run stop [FRS]" input
terminal is ON.
"Commercial power supply
change [CS]" input terminal is
ON.
"RUN enable [REN]" input
terminal has been assigned
and is turned OFF.
"RUN direction restriction
selection [b035]" is set.
"Direction reversal protection
selection [b046]" is set.
The short-circuit wire of the
[ST1]/[ST2] input terminals of
the functional safety is
disconnected or the terminals
are turned OFF.
Wirings, etc. are incorrect or
broken.
Exemplar measures to be taken
If the frequency command setting cannot be changed with
[F001] or the set frequency command is not displayed in
[F001], the frequency command is not recognized
correctly. Check the contents of this table.
Check that the "Frequency input source selection [A001]
is set correctly.
When the "Frequency input source selection [A001]
to "Control terminal (01)", measure the voltage/current
input to the [Ai1]/[Ai2] terminals with a tester, etc., and
check whether the input voltage/current and wiring are
correct.
Set the frequency command to [F001] when the
"Frequency input source selection [A001]
setting (02)".
When performing multi-speed operation ([CF1] to [CF4] or
[SF1] to [SF7]), set the frequency commands to
[A020]/[A220] to [A035] correctly.
Check that the settings such as "Frequency input source
*1
selection [A001] ", "[AT] selection [A005]", analog
start/end function ([A011] to [A016], [A101] to [A105],
[A161] to [A165]), and analog adjustment gain ([C081],
[C082]) are correct.
If the "Forced command switching [F-OP]" and "Forced
terminal [F-TM]" functions are not required, turn those
inputs OFF.
Check that there is no disconnection or incorrect
connection in the main circuit wiring.
Check that the function assignment and wiring of the
control terminals are correct. For details, refer to "9.2
Selecting Frequency Command".
Exemplar measures to be taken
If the [RS] terminal is ON, the inverter enters the reset
status and RUN command is not accepted. The [RS]
terminal needs to be turned OFF.
If the [FRS] terminal is ON, the inverter enters the free run
stop mode and RUN command is not accepted. The [FRS]
terminal needs to be turned OFF.
If the [CS] terminal is ON, the inverter enters the mode
switched to commercial power supply shut-off and RUN
command is not accepted. Check the commercial switching
function.
When the [REN] terminal is used, RUN command is not
accepted if the terminal is OFF. Check the RUN enable
signal.
Set [b035] correctly.
Set [b046] correctly.
The [ST1]/[ST2] input terminals are functional safety
terminals. When this function is not used, the short-circuit
wire must be connected.
Check the output wires to the motor and the inside of the
motor for abnormalities such as broken wires.
15-4-3
Tips/FAQ/Troubleshooting
*1
*1
" is set
*1
" is "Parameter
Page
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9-2-1
5-4-1
9-2-3
9-2-7
9-2-1
9-2-4
9-15-4
9-1-7
9-2-21
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9-1-9
9-7-10
9-7-15
9-4-4
9-4-2
9-4-3
14-1-2
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