Operation Mode At Power On (Pr. 79, Pr. 340) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

4.23.2 Operation mode at power ON (Pr. 79, Pr. 340)

When power is switched ON or when power comes back ON after instantaneous power failure, the inverter can
be started up in Network operation mode.
After the inverter has started up in the Network operation mode, parameter write and operation can be performed
from a program.
Set this mode for communication operation using the RS-485 terminals or communication option.
Parameter
Name
Number
79 Operation mode selection
*1
Communication startup
340
*2*3
mode selection
The above parameters can be changed during a stop in any operation mode.
*1 This parameter allows its setting to be changed in any operation mode even if "0 (initial value) or 1" is set in Pr. 77 Parameter write selection.
*2 This parameter allows its setting to be changed in any operation mode even if "0 (initial value)" is set in Pr. 77 Parameter write selection.
*3 The parameters can be set whenever the communication option is connected. (Refer to page 308.).
(1) Specify operation mode at power ON (Pr. 340)
⋅ Depending on the Pr. 79 and Pr. 340 settings, the operation mode at power ON (reset) changes as described below.
Operation Mode at Power ON, Power
Pr. 340 Pr. 79
Setting Setting
0
(initial External operation mode
value)
1
PU operation mode
2 External operation mode
0
(initial
3, 4 External/PU combined operation mode
value)
6
External operation mode
External operation mode when X12 (MRS) signal
ON
7
External operation mode when X12 (MRS) signal
OFF
0 NET operation mode
1 PU operation mode
2
NET operation mode
3, 4
External/PU combined operation mode
1, 2
*1
6
NET operation mode
NET operation mode when X12 (MRS) signal ON
7
External operation mode when X12 (MRS) signal
OFF
0 NET operation mode
1
PU operation mode
2 NET operation mode
10, 12
3, 4 External/PU combined operation mode
*1
6
NET operation mode
7 External operation mode
*1 The Pr. 340 setting "2" or "12" is mainly used for communication operation using the inverter RS-485 terminals. When a value other than "9999"
(selection of automatic restart after instantaneous power failure) is set in Pr. 57 Restart coasting time, the inverter will resume the same operation
state which was in before after power has been restored from an instantaneous power failure.
When Pr. 340 = "1, 10", a start command turns OFF if power failure has occurred and then restored during a start command is ON.
*2 The operation mode cannot be switched directly between the PU operation mode and Network operation mode.
*3 Operation mode can be changed between the PU operation mode and Network operation mode with
DU07) and X65 signal.
♦ Parameters referred to ♦
Pr. 57 Restart coasting time
Pr. 79 Operation mode selection
Initial Setting
Value Range
0 0 to 4, 6, 7 Select the operation mode. (Refer to page 315.)
0
1, 2
0
10, 12
Restoration, Reset
Refer to page 266.
Refer to page 313.
Selection of operation mode and operation location
Description
As set in Pr. 79.
Started in Network operation mode.
When the setting is "2", it will resume the pre-instantaneous power
failure operation mode after an instantaneous power failure occurs.
Started in Network operation mode. Operation mode can be
changed between the PU operation mode and Network operation
mode from the operation panel. When the setting is "12", it will
resume the pre-instantaneous power failure operation mode after
an instantaneous power failure occurs.
Operation Mode Switching
Switching among the external, PU, and NET operation mode is
enabled
*2
Fixed to PU operation mode
Switching between the external and Net operation mode is
enabled
Switching to PU operation mode is disabled
Operation mode switching is disabled
Switching among the external, PU, and NET operation mode is
enabled while running
Switching among the external, PU, and NET operation mode is
enabled
*2
Fixed to External operation mode (forcibly switched to External
operation mode.)
Same as when Pr. 340 = "0"
Switching between the PU and NET operation mode is
enabled
*3
Same as when Pr. 340 = "0"
Fixed to NET operation mode
Same as when Pr. 340 = "0"
Switching among the external, PU, and NET operation mode is
enabled while running
*3
Same as when Pr. 340 = "0"
key of the operation panel (FR-
321
4