Loop Control - Mitsubishi Electric FATEC MELSEC iQ-R Training Manual

4.10.13 Loop control

LOOP, LEND (loop control)
The LOOP is used for loop control by the repetition of LOOP to LEND.
• LOOP
LOOP is the loop head, and LED is the loop tail.
• LEND
When the number of repetitions specified in LOOP reaches 0, the loop will be
terminated, and the processing for the next positioning data No. will be started.
Ex.) Executed in the order of the positioning data No.1→2→3→4→5→2→3→4→5→6.
Positioning
data No.
1
2
3
4
5
6
During loop control, the positioning completion processing for the single positioning control
("00: Positioning complete" in "[Da.1] Operation pattern") will not be performed.
When using the Loop control (LOOP, LEND), set the following parameters.
: Always set, : Set as required, : Setting restricted, -: Setting not required
Parameters
[Da.1] Operation pattern
[Da.2] Control modes
[Da.3] Acceleration time No.
[Da.4] Deceleration time No.
[Da.6] Positioning address/movement amount
[Da.7] Arc address
[Da.8] Command speed
[Da.9] Dwell time/JUMP destination positioning data No.
M code/Condition data No./No. of LOOP to LEND repetitions/No. of
[Da.10]
pitches
[Da.20] Axis to be interpolated No.1
[Da.21] Axis to be interpolated No.2
[Da.22] Axis to be interpolated No.3
[Da.27] M code ON signal output timing
[Da.28] ABS direction in degrees
[Da.29] Interpolation speed designation method
*1. Set the repeat cycles.
Operation pattern
Continuous positioning control
Positioning complete
Continuous path control
Continuous positioning control
Positioning complete
Positioning complete
Setting item
Control
Condition
modes
ABS2
Number of
LOOP
loop cycles: 2
ABS2
ABS2
LEND
ABS2
4-105
A loop with
positioning data
Nos. 2 to 5 is
executed twice.
Setting required/not
required
LOOP LEND
- -
LOOP LEND
- -
- -
- -
- -
- -
- -
*1 -

- -
- -
- -
- -
- -
- -