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5. PARAMETERS
5.11 (A) Application parameters
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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.
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.)
Pr. Name Initial value Setting
range
Description
414
A800
PLC function operation
selection
0 0 PLC function disabled
1, 11 PLC function
enabled
The SQ signal is enabled by input from a
command source (external input terminal/
communication).
2, 12 The SQ signal is enabled by input from an
external input terminal.
415
A801
Inverter operation lock mode
setting
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.
416
A802
Pre-scale function selection 0 0 to 5 Unit scale factor
0: No function
1: 1
2: 0.1
3: 0.01
4: 0.001
5: 0.0001
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)"
417
A803
Pre-scale setting value 1 0 to 32767 Pre-scale
setting value
498
A804
PLC function flash memory
clear
0 0, 9696
(0 to 9999)
0: Clears the flash memory fault display (no operation
after writing while the flash memory is in normal
operation).
Write
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 Read
1: The flash memory has not been cleared because the
PLC function is enabled.
9696: During flash memory clearing operation or flash
memory fault
675
A805
User parameter auto storage
function selection
9999 1 Auto storage function enabled
9999 Auto storage function disabled
1150 to
1199
A810 to
A859
User parameters 1 to PLC
function user parameters 50
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.
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