FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLC User's Manual - Positioning Control Edition
Example Connection
Appendix 5. MELSERVO-H Series
Appendix 5-2 Absolute Position Detection (Transistor Output)
Apx. - 42
*1. Be sure to use the class-D grounding method (grounding resistance: 100
or less).
*2. Near-point signal (DOG)
*3. To ensure safety, use the forward rotation limit switch and the reverse rotation limit switch on both sides: the PLC side and
the servo amplifier side. Note that the limit switches on the PLC side should be activated slightly earlier than the limit
switches on the servo amplifier side.
*4. To detect absolute positions, connect this line to the PLC.
*5. Extension blocks are used in the connection example.
Inputs and outputs built into the main unit are available in place of extension blocks.
Appendix 5-2 Absolute Position Detection (Transistor Output)
To assign the inputs/outputs, refer to the following section.
Refer to Section 12.1 of "B. Incorporated Positioning"
Appendix 5-2-1 Sink Input and Sink Output
1. FX3UC PLC
*1. Be sure to use the class-D grounding method (grounding resistance: 100
or less).
*2. Extension blocks are used in the connection example.
Inputs and outputs built into the main unit are available in place of extension blocks.
Reverse rotation limit 2
(Servo amplifier side)
Reverse rotation limit 1
(Programmable
controller side)
LSR
Forward rotation limit 2
(Servo amplifier side)
Forward rotation limit 1
(Programmable
controller side)
LSF
Reverse rotation Forward rotation
Servo motor
SD
SG
PF
40
24
VIN 20
SG 16
TLC 25
ZSP 23
SON 12
DI4 45
DI3 44
50
CN1
FX3UC-32MT/D
COM1
FX2NC-16EYT
Y020
Y027
COM1
Y021
Y022
Y023
COM
X000
COM
X020
FX2NC-16EX
X031
X032
X033
X037
Photo-
coupler
Photo-
coupler
24 V DC
Class-D
grounding
*1
*2
*2
ABS (bit0)
ABS (bit1)
Servo-ON
ABS transfer mode
ABS request
Send data ready
MR-HA
Series servo
amplifier
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