Various Flags For Operation Commands; Forward Rotation Limit And Reverse Rotation Limit - Mitsubishi MELSEC-F FX3U Series User Manual

FX /FX Series PLC User's Manual - Positioning Control Edition
3U 3UC
Built-in Positioning Function
4.3

Various Flags for Operation Commands

4.3.1

Forward Rotation Limit and Reverse Rotation Limit

When using the servo motor, the forward rotation limit and the reverse rotation limit can be set for the servo
amplifier.
To use the DOG search function for zero return, or to set the forward rotation limit or the reverse rotation limit
for operation other than zero return using the PLC, set forward rotation limit 1 (LSF) and reverse rotation limit
1 (LSR) for the PLC so that these limit switches can be activated before forward rotation limit 2 or reverse
rotation limit 2 of the servo amplifier.
As shown in the following figure, interlock forward rotation limit 1 (LSF) with the forward limit flag, and reverse
rotation limit 1 (LSR) with the reverse limit flag. If the forward limit flag or the reverse limit flag turns ON, the
motor will perform operation depending on the output instruction as shown in the following table.
Reverse rotation limit 2
(Servo amplifier side)
Servo motor
Forward rotation limit 1
Reverse rotation limit 1
Use the flag shown in the following table to determine the forward rotation limit and the reverse rotation limit
for each pulse output destination device (Y000, Y001, Y002, Y003).
Pulse output
Forward limit
destination
device
Y000
Y001
Y002
*1
Y003
*1. Devices related to Y003 (pulse output destination) are valid only if two FX
connected to the FX
*2. The M8338 is compatible with Ver.2.00 or later. If the FX
Ver.2.00, PLSV instruction will perform operation in the M8338 = OFF mode (will perform operation
without acceleration/deceleration).
Note:
If the forward rotation limit (LSF) and the reverse rotation limit (LSR) cannot be set, observe the following
items:
• Even if forward rotation limit 2 or reverse rotation limit 2 turns ON and the servo motor is automatically
stopped, the positioning instruction currently activated cannot recognize the stop of the motor. So the
pulse will be continuously output until the instruction is deactivated.
• The DOG search function of DSZR instruction (zero return instruction with DOG search function) cannot be
used.
Reverse rotation limit 1
(Programmable
controller side)
LSR
Reverse rotation
M8343
Forward limit flag for Y000
M8344
Reverse limit flag for Y000
Reverse limit
flag flag
M8343 M8344
M8353 M8354
M8363 M8364
M8373 M8374
PLC.
3U
Forward rotation limit 1 Forward rotation limit 2
(Programmable (Servo amplifier side)
controller side)
LSF
Forward rotation
Corresponding instruction and stop
PLSV instruction
*2
(M8338 =OFF)
If the corresponding rotation
limit flag is turned on, pulse
output (operation) will be
immediately stopped.
PLC is used and its version is below
3UC
4 Before Programming
4.3 Various Flags for Operation Commands
DSZR, DVIT, ZRN,
*2
PLSV(M8338 =ON), DRVI,
and DRVA instructions
If the corresponding rotation
limit flag is turned on, the
speed will be reduced, and
then operation will be stopped.
-2HSY-ADP adapters are
3U
B - 35
A
B
Apx.