Cautions For Positioning Operation; 7.11.1 Overlapped Specification Of Operation Mode; 7.11.2 When The Travel Distance Is Small - Mitsubishi FX3U-20SSC-H User Manual

FX -20SSC-H Positioning Block User's Manual
3U
7.11

Cautions for Positioning Operation

7.11.1 Overlapped specification of operation mode

1) The positioning operation does not start at START input/command if multiple operation patterns are
selected (with multiple bits turned on) in the parameters for operating patterns.
2) When two or more positioning operation commands are ON at the same time such as the forward rotation
JOG/reverse rotation JOG command and mechanical zero return command (operation command I), such
commands are executed with the following priority.
Priority of positioning operation commands:
START command > Forward rotation JOG > Reverse rotation JOG > Mechanical zero return command
If the forward rotation JOG command and reverse rotation JOG command turn ON at the same time,
however, the forward rotation JOG/reverse rotation JOG commands are ignored.
Operation pattern selection
Forward rotation JOG
Reverse rotation JOG
Mechanical zero return
command
START command
X-START (input terminal)
Y-START (input terminal)

7.11.2 When the travel distance is small

1. 1-speed positioning operation
If the time needed for the travel distance (target address 1) is shorter than the acceleration/deceleration time,
the actual operation speed does not reach the command speed (operation speed 1).
Speed
Start
Traveling time < desired acceleration time + desired deceleration time
*1. For the relation between the time for the actual acceleration/deceleration and the specified time for
desired acceleration/deceleration, refer to the following.
Target address 1
Operation speed 1
Acceleration/deceleration
time change command
(Ver.1.30 or later)
124
Operation command 1
Operation command 1
Operation command 1
Operation command 1
Desired
acceleration
*1
time
Trapezoidal
control
Approximate S-shaped
control
Operation command 2
BFM Number
X-axis Y-axis
BFM #520 BFM #620
BFM #518 b4 BFM #618 b4
BFM #518 b5 BFM #618 b5
BFM #518 b6 BFM #618 b6
BFM #518 b9 BFM #618 b9
- -
- -
Desired
deceleration
*1
time
Operation speed 1
*1
BFM Number
X-axis
BFM #501, #500 BFM #601, #600
BFM #503, #502 BFM #603, #602
BFM #519 b5 BFM #619 b5
7 Before Starting Positioning Operation
7.11 Cautions for Positioning Operation
Data type
Control data
Control data
Control data
Control data
Control data
-
-
Time
*1
→ Refer to Section 7.2
Data type
Y-axis
Control data
Control data
Control data