Mitsubishi Electric 800 Series Function Manual page 16

(N) Operation via communication and its settings
Communication EEPROM write selection (Pr.342)
• When parameter write is performed via the inverter PU connector, RS-485 terminal, USB communication, or a
communication option, the parameters storage device can be changed to RAM only from both EEPROM and RAM. Use
this function if parameter settings are changed frequently.
• When changing the parameter values frequently, set "1" in Pr.342 Communication EEPROM write selection to write
them to the RAM only. The life of the EEPROM will be shorter if parameter write is performed frequently with the setting
unchanged from "0 (initial value)" (EEPROM write).
NOTE
• Turning OFF the inverter's power supply clears the modified parameter settings when Pr.342 = "1" (write to RAM only).
Therefore, the parameter values at next power-ON are the values last stored in EEPROM.
• The parameter setting written in RAM cannot be checked on the operation panel. (The values displayed on the operation
panel are the ones stored in EEPROM.)
Operation selection at a communication error (Pr.502, Pr.779)
• How the inverter operates at a communication line error or an option unit fault can be set.
• Operation at an error occurrence
Fault description Pr.502 setting
0
1, 11
Communication line 2, 12
3
4
0, 3
Communication
1, 2, 11, 12
option itself
4

When the communication returns to normal within the time period set in Pr.500, the protective function (E.OP1) is not activated.
• Operation after the time in Pr.500 elapses after an error occurrence
Fault description Pr.502 setting
0
1, 11
Communication line 2, 12
3
4
0, 3
Communication
1, 2, 11, 12
option itself
4

When an error occurs, the inverter outputs a command to decelerate the motor or shuts off the output, and outputs the fault, independently of the
Pr.500 setting.

Under position control, the operation is continued to the target position.
• Operation at error removal
Fault description Pr.502 setting
0
1, 11
Communication line 2, 12
3
4
0, 3
Communication
1, 2, 11, 12
option itself
4

When the communication error is removed during deceleration, the motor re-accelerates.
Under position control, the motor does not re-accelerates even when the communication error is removed during deceleration.
16
PARAMETER
Operation
Continued

Output shutoff
Output to decelerate and stop the motor
Continued
Operation
Output shutoff
Output to decelerate and stop the motor
Continues operation with the Pr.779 setting.
Output stop status continues.

Continues operation with the Pr.779 setting.
Operation
Output stop status continues.
Restart

Normal
Output stop status continues.
Continues operation with the Pr.779 setting.
Indication
Normal Not output

" E. 1 " Provided
" E. 1 " after stop Provided after stop
"CF" warning Not output
Indication
E.OP1 Provided
" "
Provided after stop
E.OP1 after stop
" "
Normal Not output

"CF" warning
" E.1 " kept Kept provided

"CF" warning Not output

Indication
E.OP1 kept Kept provided
" "
Normal Not output
" E. 1 " kept Kept provided
"CF" warning Not output
Fault output

Fault output

Fault output