5.3 Description of Function Codes 5.3.2 E codes (Extension terminal functions)
Universal DI “U-DI” assignment (Function code data = 25)
Universal DI “U-DI” assigned to digital input terminals allow to monitor signals from peripheral equipment connected
to those inputs from an upper controller via an RS-485 or fieldbus communications link. Input terminals assigned to
“U-DI” are simply monitored and do not operate the inverter.
For an access to universal DI via the RS-485 or fieldbus communications link, refer to their respective
Instruction Manuals.
Select auto search for idling motor speed at starting “STM” assignment (Function code data = 26)
This digital terminal command determines, at the start of operation, whether or not to search for idling motor speed
and follow it. ( Function code H09)
Force to stop “STOP” assignment (Function code data = 30)
Turning this terminal command “STOP” OFF causes the motor to decelerate to a stop in accordance with the H56
data (Deceleration time for forced stop). After the motor stops, the inverter enters the alarm state with the alarm
er6 displayed. ( Function code F07)
Pre-excite “EXITE” assignment (Function code data = 32)
Turning this terminal command ON activates the pre-excitation feature. Even if this pre-excitation command is not
assigned, specifying H85 (Pre-excitation: Time) to other than “0.00” enables the inverter to automatically start pre-
excitation of the motor when it is turned ON. (This applies exclusively to the inverters under vector control with
speed sensor.) ( Function codes H84, H85)
Reset PID integral and differential terms “PID-RST” assignment (Function code data = 33)
Turning this terminal command “PID-RST” ON resets the integral and differential components of the PID processor.
( Function codes J01 to J19, J23, J24, J57 to J62)
Hold PID integral term “PID-HLD” assignment (Function code data = 34)
Turning this terminal command “PID-HLD” ON holds the integral components of the PID processor.
( Function codes J01 to J19, J23, J24, J57 to J62)
Local (keypad) command selection “LOC” assignment (Function code data = 35)
This terminal command “LOC” switches the sources of run and frequency commands between remote and local.
For details of switching between remote and local modes, refer to Chapter 3 “3.3.8 Remote and local modes”.
Condensation prevention “DWP” assignment (Function code data = 39)
By turning on condensation prevention “DWP” when the motor is stopped, DC current flows to raise the motor
temperature to prevent condensation forming. ( Function code J21)
Switch to commercial power sequence (50 Hz) “ISW50”,
Switch to commercial power sequence (60 Hz) “ISW60” assignment (Function code data = 40, 41)
A magnetic contactor is controlled with built-in sequences to switch between commercial power supply operation
and inverter operation by selecting external command “ISW50” or “ISW60”.
This control is valid only when either “ISW50” or “ISW60” is assigned, and commercial power supply to inverter
operation switching “SW88”, “SW52-2” are assigned with the output terminal assignment.
Either “ISW50” or “ISW60” is used depending on the commercial power supply frequency.
Refer to <Circuit diagram and configuration> and <Operation timing scheme> from the next page onward for details.
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