4.2 Special Operation
4-26
4.2.2 Remote and local modes
The inverter is available in either remote or local mode. In the remote mode that applies to ordinary
operation, the inverter is driven under the control of the data settings stored in the inverter, whereas in the
local mode that applies to maintenance operation, it is separated from the control system and is driven
manually under the control of the keypad.
• Remote mode: Run and frequency commands are selected by function codes or source switching
signals except "Select local (keypad) operation" LOC.
• Local mode: The command source is the keypad, regardless of the settings specified by function codes.
The keypad takes precedence over the settings specified by communications link operation signals.
The table below shows the input procedures of run commands from the keypad in the local mode.
Table 4.2-1
Data for F02 Input Procedures of Run Commands from Keypad
0: Enable the keypad
(Motor rotational direction from
digital terminals)
Pressing the / keys runs or stops the motor.
The rotational direction is specified by the terminals FWD and REV.
1: External signal
2: Keypad operation (forward)
Pressing the
/ keys runs or stops the motor.
No specification of the motor rotational direction is required.
However, the motor can only rotate in the forward direction.
3: Keypad operation (reverse)
Pressing the
/ keys runs or stops the motor.
No specification of the motor rotational direction is required.
However, the motor can only rotate in the reverse direction.
The remote and local modes can be switched by a digital input signal provided from the outside of the
inverter, to switch the method for specifying the operation commands and frequency.
To enable the switching, the local (keypad) command selection "LOC" needs to be assigned LOC as a
digital input signal. (Set "35" to any of the function codes E01 to E09, E98 and E99.）
Switching from remote to local mode automatically inherits the frequency settings used in remote mode. If
the motor is running at the time of the switching from remote to local, the run command will be automatically
turned ON so that all the necessary data settings will be carried over. If, however, there is a discrepancy
between the settings used in remote mode and ones made on the keypad (e.g., switching from the reverse
rotation in remote mode to the forward rotation only in local mode), the inverter automatically stops.
The transition paths between remote and local modes depend on the current mode and the value (ON/OFF)
of LOC. Refer to the status transition diagram given below and the above table for details.
Figure 4.2-1 Transition between Remote and Local Modes
To Next Page
Loading...
Need help?
General
