Mitsubishi Electric FR-F700PJ Series Manual page 46

(2) Communication EEPROM write selection (Pr.342)
When parameter write is performed from PU connector
connected to the inverter, parameter's storage device can be
changed from EEPROM + RAM to only RAM. When
performing parameter change frequently, set "1" in Pr. 342.
(3) MODBUS RTU communication specifications
(Pr.343, Pr.549)
Pr. Setting
Number Range

343
0 (initial
549 value)
1
(4) operation selection at communication error
(Pr.502, Pr.779)
For communication using RS-485 terminals, operation at a
communication error can be selected. The operation is
active under the Network operation mode.
Pr. Setting
At error
Number Range
occurrence
0
Coasts to
(initial
stop
value)
Decelerates
1
to stop
502
Decelerates
2
to stop
Continues
3 running at
Pr.779
0 to Motor runs at the specified frequency at a
400Hz communication error.
779
9999
Motor runs at the frequency used before the
(initial
communication error.
value)
46
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Description
Display the number of communication
errors during MODBUS RTU
communication. (Reading only)
Mitsubishi inverter (computer link) protocol
MODBUS RTU protocol
Description
Fault At error
Indication
output removal
Stops
E.PUE Output
(E.PUE)
E.PUE Output Stops
after stop after stop (E.PUE)
E.PUE Without
Restarts
after stop output
Without Operates

output normally
125, 126, 241, C2(902) to C7(905), C22(922) to C25(923)
Analog input frequency change and
adjustment (calibration)
Pr.125 Terminal 2 frequency setting gain frequency
Pr.126 Terminal 4 frequency setting gain frequency
Pr.241 Analog input display unit switchover
C2(Pr.902) Terminal 2 frequency setting bias frequency
C3(Pr.902) Terminal 2 frequency setting bias
C5(Pr.904) Terminal 4 frequency setting bias frequency
C6(Pr.904) Terminal 4 frequency setting bias
C22(Pr.922) Frequency setting voltage bias frequency (built-in potentiometer)
C23(Pr.922) Frequency setting voltage bias (built-in potentiometer)
C24(Pr.923) Frequency setting voltage gain frequency (built-in potentiometer)
C25(Pr.923) Frequency setting voltage gain (built-in potentiometer)
You can set the magnitude (slope) of the output frequency as desired
in relation to the frequency setting signal (0 to 5VDC, 0 to 10V or 4 to
20mA).
The C22(Pr.922) to C25(Pr.923) settings can be used when the
operation panel (PA02) of FR-E500 series is connected using a cable.
The built-in potentiometer of the operation panel can be calibrated.
(1) Change the frequency at maximum analog input.
(Pr.125, Pr.126)
Set a value in Pr. 125 (Pr. 126) when changing only the
frequency setting (gain) of the maximum analog input power
(current). (Other calibration parameter settings can be used
without any change.)
(2) Analog input bias/gain calibration
(C2(Pr.902) to C7(Pr.905))
 The "bias" and "gain" functions are used to adjust the
relationship between the input signal entered from outside
the inverter to set the output frequency, e.g. 0 to 5V, 0 to
10V or 4 to 20mADC, and the output frequency.
60Hz
Bias
C2(Pr. 902)
0
0
Frequency setting signal
0
C3(Pr. 902)
60Hz
Bias
C5(Pr. 904)
0 20
Frequency setting
0 4
0 1
0 2
C6(Pr. 904)
(3) Analog input display unit changing (Pr.241)
 You can change the analog input display unit (%/V/mA) for
analog input bias/gain calibration.
C4(Pr.903) Terminal 2 frequency setting gain
C7(Pr.905) Terminal 4 frequency setting gain
Initial value
Gain
Pr. 125
100%
5V
10V
C4(Pr. 903)
Initial value
Gain
Pr. 126
100%
20mA
signal
5V
10V
C7(Pr. 905)