2 X-NET motion fieldbus
2-1. Function summary
XDC series PLC has one channel motion fieldbus, can connect 20 axes at most, 2 axes pulse
output. It can perform incremental position motion control, absolute position motion control,
multi-segment motion control for single axis, synchronous motion control for multi-axis. Some
instructions can real-time modify the target position and motion speed.
SM coil can perform jog run and back to origin for single axis.
2-1-1. Special vocabulary
The following table will explain the special vocabulary:
Vocabulary
Explanation
Origin
Electrical zero
machine datum
point
mechanical zero
Zero point
The point whose pulse accumulated register is 0
Absolute position The position of relative zero
Incremental
position
Position offset before executing the relative
instruction
Encoder feedback Pulse feedback value of encoder counting
Axis state
Enable state, motion state
2-1-2. Fieldbus wiring
XDC series PLC is also can be called fieldbus multi-axis motion controller. The fieldbus motion
controller communicates with servo drive through filedbus. The advantages are high performance,
high reliability, easy to maintenance, save the wiring.
X-NET motion filedbus servo system wiring: insert the RS485 expansion BD XD-NE-BD in the
BD slot of XDC series PLC. There are 4 terminals on the BD: A, B, SG(signal), FG(ground).
The terminal A, B of BD will connect to the A1, B1 of JA-NE-L module. The module is installed
on the CN1 port of DS3E series servo drive. SG terminal of BD will connect to SG terminal of
JA-NE-L. A1 and A2, B1 and B2 are shorted for module JA-NE-L. The following wiring diagram
is one PLC control multi-servo.
