User`s manual

62 FP5/GP5 User’s Manual
Chapter 3 - Programming Features
FP5/GP5 Operation
·MODBUS Frequency Reference Unit (n103, MODBUS Fref Unit)
The frequency reference units from the PLC and in the frequency refer-
ence and output frequency monitors (by communication) are set with
parameter n103. The output frequency resolution of the FP5/GP5
is 0.1Hz. Even if the frequency reference unit is changed to 0.01Hz in
parameter n103, the value in the hundredth digit of the received fre-
quency reference is rounded off internally. When 30,000/100% in units
of 0.1% is selected, the value is rounded off in the same way.
·MODBUS Slave Address (n104, MODBUS Address)
Sets the slave address number. It is necessary to set the address number
so that it will not overlap with the address number of another slave unit
connected on the same transmission line.
Note:To change the values set in parameters n104 to n106 and enable new settings, it is
necessary to cycle power after entering the desired values.
Motor Overload Detection
The FP5/GP5 protects against motor overload with a UL-recog-
nized, built-in electronic thermal overload relay function.
·Motor Rated Current (n033, Motor Rated FLA)
Set to the rated current value shown on the motor nameplate.
Note: setting to 0.0A disables the motor overload protection function.
·Motor overload protection selection (n034, Motor OL Sel)
The electronic thermal overload function estimates motor temperature,
based on inverter output current and time, to protect the motor from
overheating. When the electronic thermal overload relay is activated, an
“oL1” error occurs, shutting OFF the inverter output and preventing
excessive overheating in the motor.
When operating with one inverter connected to one motor, an external
thermal relay is not needed. When operating several motors with one
inverter, install a thermal relay on each motor. In this case, set parame-
ter n034 to “Disabled”.
LED Setting LCD Setting Electronic Thermal Characteristics
0 Disabled Protection disabled
1 STD Motor / 8 min Applied to general-purpose motor,
standard rating (Class 20 overload)
2 STD Motor / 5 min Applied to general-purpose motor,
short time rating (Class 10 overload)
3 INV Motor / 8 min Applied to blower-cooled / inverter duty motor,
standard rating (Class 20 overload)
4 INV Motor / 5 min Applied to blower-cooled / inverter duty motor,
short time rating (Class 10 overload)
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