Mitsubishi Electric 800 Series Instruction Manual page 464

5.11.15 PLC function
The inverter can be run in accordance with a sequence program.
In accordance with the machine specifications, a user can set various operation patterns: inverter movements at signal inputs,
signal outputs at particular inverter status, and monitor outputs, etc.
Pr. Name
414 PLC function operation
A800 selection
415 Inverter operation lock mode
A801 setting
416 Pre-scale function selection
A802
417 Pre-scale setting value
A803
498 PLC function flash memory
A804 clear
675 User parameter auto storage
A805 function selection
1150 to
User parameters 1 to PLC
1199 function user parameters 50
A810 to
A859
 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.)
Initial value Setting
range
0 0 PLC function disabled
1, 11 PLC function
enabled
2, 12
0 0 The inverter start command is enabled regardless of the
operating status of the sequence program.
1 The inverter start command is enabled only while the sequence
program is running.
0 0 to 5 Unit scale factor
0: No function
1: 1
2: 0.1
3: 0.01
4: 0.001
5: 0.0001
1 0 to 32767 Pre-scale
setting value
0 0, 9696 0: Clears the flash memory fault display (no operation
(0 to 9999) after writing while the flash memory is in normal
operation).
9696: Clears the flash memory (no operation Write after
writing during flash memory fault).
Other than 0 and 9696: Outside of the setting range
0: Normal display
1: The flash memory has not been cleared because the
PLC function is enabled.
9696: During flash memory clearing operation or flash
memory fault
9999 1 Auto storage function enabled
9999 Auto storage function disabled
0 0 to 65535 Desired values can be set.
Because devices D206 to D255 used by the PLC function can be
mutually accessed, the values set to Pr.1150 to Pr.1199 can be
used by the sequence program. The result of performing
calculation by a sequence program can also be monitored by
Pr.1150 to Pr.1199.
Description
The SQ signal is enabled by input from a
command source (external input terminal/
communication).
The SQ signal is enabled by input from an
external input terminal.
When the pulse train is input from terminal
JOG, the number of sampled pulses can be
converted.
The result of conversion is stored to SD1236.
"Number of sampled pulses" = "input pulse
value per count cycle"  "pre-scale setting
value (Pr.417)"  "unit scale factor (Pr.416)"
5. PARAMETERS
5.11 (A) Application parameters
3
4
5
5
5
6
7
Write
8
9
Read
10
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