4-79
When the PID control is disabled:
The normal/inverse operation selection for the manual reference frequency is as follows.
Selection of normal/inverse operation for
frequency command 1 (C53)
IVS
Final operation
0: Normal operation
–
Normal
1: Inverse operation
–
Inverse
When the process control is performed by the PID control facility integrated in the inverter, the
IVS
is used
to switch the PID processor output (reference frequency) between normal and inverse, and has no effect
on any normal/inverse operation selection of the manual frequency setting.
Refer to the descriptions of J01 through J19 and J56 through J62.
Interlock --
IL
(Function code data = 22)
In a configuration where a magnetic contactor (MC) is installed in the power output (secondary) circuit of the
inverter, the momentary power failure detection feature provided inside the inverter may not be able to accurately
detect a momentary power failure by itself. Using a digital signal input with the interlock command
IL
assures the
accurate detection.
Refer to F14.
Terminal command
IL
Meaning
OFF
No momentary power failure has occurred.
ON
A momentary power failure has occurred.
(Restart after a momentary power failure enabled)
Cancel torque control -- Hz/TRQ (Function code data = 23)
When torque control is enabled (H18 = 2 or 3), assigning the terminal command
Hz/TRQ
("Cancel torque control")
to any of the general-purpose digital input terminals (data = 23) enables switching between speed control and
torque control.
Cancel torque control signal Hz/TRQ Operation
ON
Cancel torque control (Enable speed control)
OFF
Enable torque control
Enable communications link via RS-485 or fieldbus (option) -- LE (Function code data = 24)
Turning this terminal command ON gives priorities to frequency commands or run commands received via the
RS-485 communications link (H30) or the fieldbus option (y98). No
LE
assignment is functionally equivalent to the
LE
being ON.
Refer to H30 (Communications link function) and y98 (Bus link function).
Universal DI --
U-DI
(Function code data = 25)
Using
U-DI
enables the inverter to monitor digital signals sent from the peripheral equipment via an RS-485
communications link or a fieldbus option by feeding those signals to the digital input terminals. Signals assigned to
the universal 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.
Enable auto search for idling motor speed at starting --
STM
(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.
Refer to H09 (Starting mode).
