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FX3U/FX3UC Series PLC User's Manual - Positioning Control Edition
8 1-Speed Positioning - DRVI/DRVA Instruction
Built-in Positioning Function
8.3 Drive To Absolute (DRVA Instruction)
The rotation direction depends on the ON/OFF status of the specified device as shown in the following
table.
During execution of this instruction, however, do not use the output specified by D2
ON/OFF status of device
specified by D2
ON
OFF
8.3.4
Rotation direction (increase/reduction of current value)
Forward rotation (Outputting the D1
pulse will The rotation direction (normal or reverse
rotation) depends on which value is larger;
the number of output pulses specified by
increase the current value.)
Reverse rotation (Outputting the D1
reduce the current value.)
pulse will
S
(absolute address) or the value
indicated on the current value register.
Important Points
→ For the important points of programming, refer to Section 4.7.
• Even if the operand is subject to change during execution of the instruction, the operation will be continued
while ignoring the change.
Note that the changed operand will be enabled at next activation of the instruction.
• If the instruction activation contact is turned off during execution of the instruction, the speed will be
reduced and then the operation will be stopped.
In this case, "Instruction execution complete" flag (M8029) will not be turned on.
• If the limit flag (forward limit flag or reverse limit flag) in the operation direction is turned on, the speed will
be reduced and then the operation will be stopped. In this case, "Instruction execution abnormal end" flag
(M8329) will be turned on when completing execution of the instruction.
→ For details on "Instruction execution abnormal end" flag, refer to Subsection 4.7.4.
• If "pulse output monitor" (BUSY/READY) flag is on, the positioning instruction (including PLSR and PLSY)
that uses the same output cannot be executed.
After the instruction activation contact is turned off, if "pulse output monitor" (BUSY/READY) flag is still on,
do not execute the positioning instruction (including PLSR and PLSY instructions) having the same output
number.
B - 110