Mitsubishi Electric FR-A800 Series Instruction Manual page 648

Pr.
414 PLC function operation
A800 selection
415 Inverter operation lock
A801 mode setting
416 Pre-scale function
A802 selection
417
Pre-scale setting value
A803
498 PLC function flash
A804 memory clear
User parameter auto
675
storage function
A805
selection
1150 to
1199 User parameters 1 to
A810 to User parameters 50
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.)
• The following shows the required conditions to enable the SQ signal.
Pr.414 setting
1, 11
2, 12
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Initial
Name
value
0
1, 11
0
2, 12
0
0
1
0 0 to 5
1 0 to 32767
0, 9696 (0 to
0
9999)
1
9999
9999
0 0 to 65535
Pr.338 setting
0
1
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Setting
range
PLC function disabled
PLC function enabled
The inverter start command is enabled regardless of the operating status of
the sequence program.
The inverter start command is enabled only while the sequence program is
running.
Unit scale factor
0: No function
1: ×1
2: ×0.1
3: ×0.01
4: ×0.001
5: ×0.0001
Pre-scale setting value
0: Clears the flash memory fault display (no operation after
writing while the flash memory is in normal operation).
9696: Clears the flash memory (no operation after writing
while the flash memory is at a fault).
Other than 0 and 9696: Outside the setting range
0: Normal display
1: The flash memory is not cleared because the PLC
function is enabled.
9696: During flash memory clearing operation or flash
memory fault
Auto storage function enabled
Auto storage function disabled
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.
Input via an external (physical) terminal
ON
ON
ON
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 sampling 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)
SQ signal
Input via a communication virtual
terminal
ON
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5. PARAMETERS
5.14 (A) Application parameters
1
2
3
4
5
6
Write
7
8
Read
9
10
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