Hitachi NT2021XA, Instruction Manual

Page: 46 / 84

Chapter 2 Syntax
2-30
stop statement Instruction to stop motor operation by the inverter
- Format
Format Description
stop This instruction makes the inverter decelerate and stop the motor.
- Explanation
This instruction makes the inverter decelerate and stop the motor and reset the inverter when it is in trip situation.
When the FW terminal is on (FW = 1) or the RV terminal is on (RV = 1), this instruction turns off the FW terminal (FW = 0) or
RV terminal (RV = 0).
- Sample program : Program to make the inverter operate the motor for forward or reverse rotation at a constant speed for 10
seconds
Label Mnemonic parameter1 parameter2 parameter3 parameter4 parameter5
㩷
㩷
㩷 䋺
㩷 㩷 㩷 㩷 㩷 㩷
㩷
if X(00) <> 1 then LBL1
㩷
㩷
FW= 1
㩷 㩷 㩷
: When X (00) is on, operate the motor for
forward rotation.
㩷
goto LBL2
㩷 㩷 㩷 㩷
LBL1 RV= 1
㩷 㩷 㩷
: When X (00) is on, operate the motor for
reverse rotation.
LBL2 wait FA1 = 1
㩷 㩷
: Wait until the motor rotates at a constant
speed.
㩷
wait 10.00
㩷 㩷 㩷 㩷
: Operate the motor at 5 Hz for 10
seconds.
㩷
stop
㩷 㩷 㩷 㩷 㩷
: Decelerate and stop the motor. (FW = 0
or RV = 0)
㩷
㩷 䋺
㩷 㩷 㩷 㩷 㩷 㩷
chg param statement Instruction to change a parameter setting
- Format
Format Description
chg param <display code> <variable> or <constant>
This instruction changes the setting of the inverter
parameter specified by
<display code> to
<variable> or <constant> .
- Explanation
<display code> specifies the parameter number of the inverter parameter of which the setting is to be changed. The range of
parameter settings depends on the standard inverter specifications. For the inverter parameters and ranges of their settings,
refer to the Inverter Instruction Manual.
Specify an integer as the desired new setting of the parameter in
<variable> or <constant> . To specify a numerical value other
than 0 to 127, preset the value in a variable and specify the variable as <variable> . The changed parameter setting is reflected
in the inverter in a 40-ms cycle, which conforms to the standard inverter specifications. If, however, you directly access the
inverter's EEPROM, the change is reflected in the inverter in the same cycle as that of instruction execution.
Note 1 : You cannot specify any of parameters “U001” to “U012” in <display code>.
Note 2 : When the parameter is changed, it is not memorized in EEPROM. It returns to an initial value by the power
shutdown.