Sequence Program Execution - Mitsubishi Electric A800 Programming Manual

Prior to creating sequence programs
1.7.3

Sequence program execution

Parameter
number
PLC function operation
414

selection
Inverter operation lock
415
mode setting

Reset the inverter after configuring settings to enable the PLC function.
PLC function operation selection (Pr.414)
• To enable the PLC function, set "1" or "2" in Pr.414 PLC function operation selection. When Pr.414 = "1", the command
source for the sequence start (SQ) signal is determined by Pr.338 Communication operation command source. When
"2" is set in Pr.414, SQ signal from the external input terminal is valid regardless of the setting of the Pr.338.
• 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.
• Remote RUN/STOP of the PLC function can be executed in any of the following methods:
• Using the PLC function parameters (contact)
• Using FR Configurator2 (Developer)
• Via CC-Link communication (refer to
NOTE
• Turn OFF (STOP) the SQ signal when creating a sequence program.
• The RUN state output (Y) is internally stored and all outputs (Y) are turned off by turning the SQ signal OFF (STOP) after
sequence program execution (SQ signal ON).
The other devices retain the data prior to STOP. To clear the remaining device data, power OFF or reset (RES signal ON (0.1
s)OFF) the inverter.
Inverter operation lock mode setting (Pr.415)
• When "1" is set in Pr.415 Inverter operation lock mode setting, the inverter can be operated only when the sequence
program is set to the "RUN" status. By changing the PLC program status from RUN to STOP during inverter operation, the
motor decelerates to stop.
POINT POINT
• To run the inverter without using the PLC function, set Pr.415 = "0" (initial value) (the start signal of the inverter is enabled).
NOTE
• This parameter cannot be written during inverter operation, regardless of the Pr.77 setting.
• During automatic operation using SD1148 (or SM1200 to SM1211) in the sequence program, the inverter stops operation if
the sequence program is in the STOP state while Pr.415 = "1". However, when Pr.415 = "0", the device data is retained and
the operating status does not change (the inverter continues operation) even if the sequence program is in the STOP state.
• Pr.415 setting is also enabled for the start signals of the operation panel.
14
PLC Function
Initial
Name
value
0
0
page 58.)
Setting
range
0 PLC function disabled
The SQ signal is enabled by input from a
1 command source (external input terminal/
PLC
communication).
function
enabled
The SQ signal is enabled by input from an
2
external input terminal
The start signal of the inverter is enabled regardless of
0
execution instruction of the sequence program.
The start signal of the inverter is enabled only when
the sequence program is in RUN state. (The SQ signal
is ON.)
When the sequence program is in STOP state (the SQ
1
signal is OFF), the inverter will not start even if the
start signal STF or STR is turned ON. (If the state is
changed from RUN to STOP during operation, the
inverter decelerates and stops.)
Description