Count Method 1 - Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual

Count method 1

The following shows an operation overview of Count method 1, one of the OPR methods. If a machine OPR operation is
started using Count method 1 from a point where the near-point dog is ON, the machine moves in the reverse direction to the
OPR direction to return to a point where the near-point dog turns OFF, and a normal machine OPR operation is implemented.
The machine OPR can be implemented using Count method 1 even in the following situations.
• Where the near-point dog is on
• After the machine OPR is completed
Operation chart
Machine OPR start
([Cd.184] Positioning start signal)
OPR request flag
([Md.31] Status: b3)
OPR complete flag
([Md.31] Status: b4)
Deviation counter clear output
[Md.26] Axis operation status
[Md.34] Movement amount
after near-point dog ON
[Md.20] Current feed value
[Md.21] Machine feed value
1.
The machine OPR is started. (The machine starts accelerating according to the setting of "[Pr.51] OPR acceleration time
selection" in the direction specified in "[Pr.44] OPR direction", and moves at the speed set in "[Pr.46] OPR speed" when
the acceleration is completed.)
2.
When the on state of the near-point dog is detected, the machine starts decelerating.
3.
The machine decelerates to the speed set in [Pr.47] Creep speed and moves at the creep speed after that.
4.
When the first zero signal is detected after the axis has traveled the movement amount set in "[Pr.50] Setting for the
movement amount after near-point dog ON" from the point where the near-point dog is turned ON, the positioning
module stops outputting pulses and outputs a "Deviation counter clear output" to the drive unit. (Deviation counter clear
signal output time is set in [Pr.55].)
5.
After the "Deviation counter clear output" finishes, the OPR complete flag ([Md.31] Status: b4) turns OFF→ON, and the
OPR request flag ([Md.31] Status: b3) turns ON→OFF.
8 OPR CONTROL
86
8.2 Machine OPR
V
[Pr.46] OPR speed
1.
Near-point dog
OFF
Zero signal
ON
OFF
ON
OFF
OFF
Standby OPR
Not set
0
Not set Store traveled value
[Pr.50] Setting for the movement amount
after near-point dog ON
[Pr.47] Creep speed
t
2. 3. 4. 5.
[Md.34] Movement amount after near-point dog ON
The near-point dog must be turned off at a sufficient
distance from the OP.
ON
Adjust so that the movement amount setting after near-point
dog ON is as close to the 0-point signal HIGH center as
possible. If the movement amount setting after near-point dog
ON is applied to the 0-point signal, a difference may occur in
the servomotor 1 rotation at the machine OPR stop position.
First 0-point after travel of the value set using
"[Pr.50] Set movement amount after
near-point dog ON"
Servomotor 1 rotation
ON
[Pr.55] Deviation counter clear signal output time
Standby
Value of *1
OP address
*1