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PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
8 1-Speed Positioning - DRVI/DRVA Instruction
8.2 Drive to Increment - DRVI Instruction
B - 117
A
Common Items
B
Built-in
Positioning
Functions
Apx.
Example
Connection
The rotation direction ON/OFF status of the specified device is shown in the following table.
During instruction execution, however, do not use the output for other purposes.
8.2.4 Important Points
→ For the important points of programming, refer to Section 4.7.
• If an operand is changed during instruction execution, the change will be ignored and the operation will not
be affected.
Note that the changed operand will be enabled at the next activation of the instruction.
• If the instruction activation contact is turned off during execution of the instruction, the speed will
decelerate and the operation will stop.
In this case, the "Instruction execution complete" flag (M8029) will not be turned on.
• If the limit flag (forward limit relay or reverse limit relay) in the operation direction is turned on, the speed
will decelerate and the operation will stop.
In this case, the "Instruction execution abnormal end" flag (M8329) will be turned on when execution of the
instruction is complete.
→ For details on the "Instruction execution abnormal end" flag, refer to Subsection 4.7.4.
• While the "pulse output monitor" (BUSY/READY) flag is on, a positioning instruction (including PLSR and
PLSY) that uses the same output cannot be executed.
If the "pulse output monitor" (BUSY/READY) flag is still on after the instruction activation contact is turned
off, do not execute a positioning instruction (including PLSR and PLSY instructions) that uses the same
output number.
ON/OFF status of device
specified by
Rotation direction (increase/decrease current value)
ON
If the number of output pulses specified by is a positive number, the operation will be
performed in the forward rotation direction.
Forward rotation (Outputting pulses from will increase the current value.)
OFF
If the number of output pulses specified by is a negative number, the operation will
be performed in the reverse rotation direction.
Reverse rotation (Outputting pulses from
will decrease the current value.)
D
2
D
2
S
1
D
1
S
1
D
1