Noise Elimination At The Analog Input; Reset Selection, Disconnected Pu Detection; Output Function Of Alarm Code; Prevention Of Parameter Rewrite - Mitsubishi Electric FR-F700 Manual

Noise elimination at the analog
Pr.
74
input
Pr.74 Input filter time constant
The time constant of the primary delay filter relative to external
frequency command (analog input (terminal 1, 2, 4) signal) can
be set.
Valid for eliminating noise of the frequency setting circuit.
Increase the filter time constant if steady operation cannot be
performed due to noise.
A larger setting results in slower response. (The time constant can
be set between approximately 10ms to 1s with the setting of 0 to 8.)
Reset selection, disconnected PU
Pr.
75
detection
Pr.75 Reset selection/disconnected PU detection/PU stop selection
You can select the reset input acceptance, disconnected PU
(FR-DU07) connector detection function and PU stop function.
Pr.75
Reset Selection
Setting
Reset input normally
0
enabled.
Reset input enabled
1 only when the protective
function is activated.
Reset input normally
2
enabled.
Reset input enabled
3 only when the protective
function is activated.
14
Reset input normally
(initial
enabled.
value)
Reset input enabled
15 only when the protective
function is activated.
Reset input normally
16
enabled.
Reset input enabled
17 only 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) 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, the motor can be stopped by pressing
the PU.
indicates simple mode parameters and
Pr.
Disconnected PU Stop
PU Detection Selection
If the PU is
disconnected,
operation will be
Pressing
continued as-is.
decelerates the
motor to a stop only
When the PU is
in the PU operation
disconnected,
mode.
the inverter
output is shut
off.
If the PU is
disconnected,
Pressing
operation will be
continued as-is. decelerates the
motor to a stop in
any of the PU,
When the PU is
external and
disconnected,
communication
the inverter
operation modes.
output is shut
off.
indicates extended parameters. When setting parameters, refer to the instruction manual (applied) and understand instructions.
Pr.
Pr.

Output function of alarm code

76
Pr.76 Alarm code output selection
At alarm occurrence, its description can be output as a 4-bit
digital 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) Without alarm code output
1 With alarm code output (Refer to the following table)
Alarm code output at alarm occurrence only (Refer to
2
the following table)
The following table indicates alarm codes to be output. (0: output
transistor off, 1: output transistor on)
Operation Panel Output of Output Terminals
Indication
SU
(FR-DU07)
Normal * 0
E.OC1 0
E.OC2 0
E.OC3 0
E.OV1 to E.OV3 0
E.THM 0
E.THT 0
E.IPF 0
E.UVT 1
E.FIN 1
E.BE 1
E. GF 1
E.OHT 1
E.OLT 1
E.OPT 1
E.OP1 1
Other than the
1
above
* When Pr. 76 = "2", the output terminals output the signals assigned to Pr.
190 to Pr. 196.
Pr.

Prevention of parameter rewrite

77
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)
1
of
2
Prevention of reverse rotation of
Pr.
78
the motor
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
Alarm Code
IPF OL FU
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 0
1 1 1
Description
Write is enabled only during a stop
Parameter write is not enabled.
Parameter write is enabled in any operation
mode regardless of operation status.
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
36