Mitsubishi Electric 800 Series Instruction Manual page 533

(A) Application parameters
Outline of PLC function
• To enable the PLC function, set a value other than "0" in Pr.414 PLC function operation selection. When "2 or 12" is set
in Pr.414, the Sequence startup (SQ) signal from the external input terminal is valid regardless of the setting of the Pr.338
Communication operation command source. (The Pr.414 setting change becomes valid after inverter reset.)
• Switch the execution key (RUN/STOP) of the sequence program by turning the SQ signal ON/OFF. The sequence program
can be executed by turning the SQ signal ON. To input the SQ signal, set "50" in any of Pr.178 to Pr.189 (Input terminal
function selection) to assign the function to a terminal.
• When "1" is set in Pr.415 Inverter operation lock mode setting, the inverter can be operated only when the sequence
program is running. By changing the PLC program status from RUN to STOP during inverter operation, the motor
decelerates to stop.
To stop the inverter operation at the STOP status of the PLC program while performing auto operation using SD1148 (or
SM1200 to 1211) of the PLC program, set Pr.415 = "1".
• For reading or writing sequence programs, use FR Configurator2 on the personal computer connected to the inverter via
RS-485 communication or USB. (When Pr.414 ≠ "0", sequence programs can be read from or written to FR Configurator2.)
User parameter (data register (D)) auto storage function selection
• Setting Pr.675 = "1" enables the auto storage function for user parameters.
• The user parameter auto storage function is used to store the setting of Pr.1195 PLC function user parameters 46 (D251)
to Pr.1199 PLC function user parameters 50 (D255) automatically in EEPROM at power OFF or inverter reset.
• The auto storage function is disabled while the inverter performs any of the following.
Measurement of the main circuit capacitor's life, offline auto tuning, or measurement of load characteristics
NOTE
• The auto storage function may fail if the EEPROM is accessed by other functions at the same time at power OFF. To ensure
the auto storage, provide a power source for the control circuit separately from that of the main circuit.
User parameter reading from EEPROM
• User parameters (Pr.1150 to Pr.1199) are read from RAM or EEPROM according to the settings in Pr.342 Communication
EEPROM write selection and Pr.414 PLC function operation selection. When Pr.414 = "11 or 12", RAM data is read
regardless of the Pr.342 setting.
Device
Inverter (via communication),
FR Configurator2
Communication option
Parameter unit
Operation panel
NOTE
• For the details of the PLC function, refer to the PLC Function Programming Manual and the Instruction Manual of FR
Configurator2.
532
PARAMETERS
Pr.342 Pr.414
0, 1, 2 EEPROM
0
11, 12 RAM
0, 1, 2 RAM
1
11, 12 RAM
0, 1, 2 (Differs according to the option type.)
0
11, 12 RAM
0, 1, 2 RAM
1
11, 12 RAM
0, 1, 2 EEPROM
0
11, 12 RAM
0, 1, 2 EEPROM
1
11, 12 RAM
Read from Written to
EEPROM
RAM
EEPROM
RAM
EEPROM
RAM