33 PROGRAMMING
33.2 Cautions for Program Creation
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33
Online change
Do not perform online change if a positioning instruction is being executed (pulses are being output).
Operations if online change is performed while the instruction is executed are described in the following table.
Also do not perform online change if PWM is being executed.
For details on the PWM/DPWM instructions, refer to MELSEC iQ-F FX5 Programming Manual (Instructions, Standard
Functions/Function Blocks).
*1 Only CPU module is supported.
Note that immediate stop may damage the machine because the motor stops immediately.
Positioning instruction PLC operation when online change is performed
while instruction is executed
Reference
Pulse Y output instruction
*1
PLSY/DPLSY Immediately stops pulse output. Page 423
Mechanical OPR instruction DSZR/DDSZR Decelerates and stops pulse output. Page 429
Relative positioning instruction DRVI/DDRVI Page 441
Absolute positioning instruction DRVA/DDRVA Page 451
Interrupt 1-speed positioning
instruction
DVIT/DDVIT Page 461
Variable speed operation
instruction
PLSV/DPLSV With acceleration/
deceleration
operation
Decelerates and stops pulse output. Page 472
Without
acceleration/
deceleration
operation
Immediately stops pulse output.
Single-table operation
instruction
*1
TBL Online change cannot be performed. Page 481
Multiple-table operation
instruction
DRVTBL Page 490
Multiple-axis table operation
instruction
DRVMUL Page 499