Loop - Mitsubishi Electric MELSEC iQ-R-RD75P4 User Manual

LOOP

The loop control with repetition of the LOOP to LEND instructions is performed.
Operation
The loop of LOOP to LEND is repeated for the set number of the repetition.
Positioning data to be set
To use the LOOP instruction, set the following positioning data.
: Always set, : Set as required, : Setting not required
Setting item
[Da.1] Operation pattern
[Da.2] Control method
[Da.3] Acceleration time No.
[Da.4] Deceleration time No.
[Da.5] Axis to be interpolated
[Da.6] Positioning address/movement amount
[Da.7] Arc address
[Da.8] Command speed
[Da.9] Dwell time
[Da.10] M code
[Da.27] M code ON signal output timing
[Da.28] ABS direction in degrees
[Da.29] Interpolation speed specification method
For details on the settings, refer to the following.
Page 420 Positioning Data
Restrictions
• If 0 is set for the number of repetition, Control method LOOP setting error (Error code: 1A33H) occurs.
• Although the error does not occur even if LEND is not set after LOOP, the repetition is not processed.
• The nesting between LOOP and LEND cannot be set. If the nesting is set, only the inner LOOP to LEND are processed
repeatedly.
The setting becomes easier than the special start FOR (times) by setting required items in the control method.
(Page 164 Repeated start (FOR loop))
• Special start: Positioning start data, special start data, condition data, and positioning data
• Control method: Positioning data
For the special start FOR to NEXT, positioning data is required for each point of FOR and NEXT. However, the
loop is available with only one data in the control method.
The nesting is available by combining the control method LOOP to LEND and the special start FOR to NEXT.
However, LOOP to LEND cannot be set across the blocks. Set the processing of LOOP to LEND to be
finished in one block.
For details on Block, refer to the following.
Page 154 ADVANCED POSITIONING CONTROL
3 MAJOR POSITIONING CONTROL
152
3.2 Positioning Data Setting
Setting requirement

 (Set LOOP.)







 (Sets the number of repetition.)


