Reset Selection, Disconnected Pu Detection; Output Function Of Alarm Code; Prevention Of Parameter Rewrite; Prevention Of Reverse Rotation Of The Motor - Mitsubishi Electric FR-A700 Manual

⋅
On the assumption that the Pr.849 setting 100% as 0, the
offset voltage is offset as follows:
100%<Pr.849...positive side
100%>Pr.849...negative side
The offset voltage is found by the following formula.
Voltage at 100%
Offset voltage =
(according to the Pr.73 setting)
0%
0% 100%
Pr.
Pr.
75

Reset selection, disconnected PU detection

Pr.75 Reset selection/disconnected PU detection/PU stop selection
You can select the reset input acceptance, disconnected PU (FR-
DU07/FR-PU04/FR-PU07) connector detection function and PU
stop function.
Pr.75
Reset Selection
Setting
Reset input normally
0
enabled
Reset input enabled only
1
when the protective
function is activated
Reset input normally
2
enabled
Reset input enabled only
3
when the protective
function is activated
14
Reset input normally
(initial
enabled
value)
Reset input enabled only
15
when the protective
function is activated
Reset input normally
16
enabled
Reset input enabled only
17
when the protective
function is activated
Reset selection
⋅
You can select the operation timing of reset function (RES
signal, reset command through communication) input.
Disconnected PU detection
⋅
This function detects that the PU (FR-DU07/FR-PU04/FR-
PU07) has been disconnected from the inverter for longer
than 1s and causes the inverter to provide an alarm output
(E.PUE) and come to an alarm stop.
PU stop selection
⋅
In any of the PU operation, external operation and network
operation modes,
pressing of the PU.
53
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Pr.849 -100
×
100
Slope determined
according to Pr.125
and C2 to C4
Slope does not
change.
100% Speed setting
signal
(10V or 5V)
Pr.849 setting
200%
Disconnected PU
PU Stop Selection
Detection
If the PU is
disconnected,
operation will be
continued as-is.
Pressing
decelerates the motor
to a stop only in the PU
When the PU is
disconnected, the operation mode.
inverter output is shut
off.
If the PU is
disconnected,
operation will be Pressing
continued as-is.
decelerates the motor
to a stop in any of the
PU, external and
When the PU is
communication
disconnected, the
operation modes.
inverter output is shut
off.
the motor can be stopped
Pr.
Pr.
76

Output function of alarm code

Pr.76 Alarm code output selection
At alarm occurrence, its description can be output as a 4-bit digital
[V]
signal from the open collector output terminals.
The alarm code can be read by a programmable controller, etc.,
and its corrective action can be shown on a display, etc.
Pr.76 Setting
0 (initial value)
1
2
The following table indicates alarm codes to be output.
(0: output transistor off, 1: output transistor on)
Operation Panel
Indication
(FR-DU07)
Normal*
E.OC1
E.OC2
E.OC3
E.OV1 to
E.OV3
E.THM
E.THT
E.IPF
E.UVT
E.FIN
E.BE
E. GF
E.OHT
E.OLT
E.OPT
E.OP3
Other than the
above
* When Pr.76 = "2", the output terminals output the signals assigned to Pr.190 to Pr.196
Pr.
Pr.
77

Prevention of parameter rewrite

Pr.77 Parameter write selection
You can select whether write to various parameters can be
performed or not. Use this function to prevent parameter values
from being rewritten by misoperation.
Pr. 77 Setting
0 (initial value)
Write is enabled only during a stop.
1
Parameter write is not enabled.
Parameter write is enabled in any operation mode regardless of
2
operation status.
Pr.
Pr.
78

Prevention of reverse rotation of the motor

by
Pr.78 Reverse rotation prevention selection
This function can prevent reverse rotation fault resulting from the
incorrect input of the start signal.
Pr.78 Setting
0 (initial value)
1
2
Description
Without alarm code output
With alarm code output (refer to the table below)
Alarm code output at alarm occurrence only (refer to the table
below)
Output of Output Terminals
Alarm Code
SU IPF OL FU
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 0
1 1 1 1
Description
Description
Both forward and reverse rotations allowed
Reverse rotation disabled
Forward rotation disallowed
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
E
F