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FANUC SERVO AMPLIFIER βi series
I/O Link option
DESCRIPTIONS
61 /
5.2.11 Details of Cable K20 (Connection of FANUC I/O LINK)
5.2.11.1 Overview
The FANUC I/O Link is a serial interface for connecting a CNC, SVM,
I/O Unit-A, Power Mate, and so forth to transfer I/O signals (bit data) at
high-speed among those units. When multiple units are connected by
using the FANUC I/O Link, one unit functions as a master, and the other
units function as slaves. The states of input signals from the slaves are
transferred to the master at regular intervals, and an output signal from
the master is transferred to the slaves at regular intervals. The β series
servo amplifier (with the I/O Link option) can function only as a slave.
The number of input points is 128, and the number of output points is
also 128.
The connector names of the I/O Link are JD1A (or JD1A1) and JD1B,
which are common to all units with the I/O Link function. A cable must
always be connected from JD1A (or JD1A1) to JD1B. No cable is
connected to JD1A of the last unit, so that JD1A of the last unit is left
open, and need not have a component such as a terminator connected.
An I/O Link connection may be made via an electric cable or optical
cable. Use an optical cable in the following cases:
- When the cable is longer than 10 m, or when the cable within the
same cabinet is longer than 15 m. If the cable is installed in a duct,
the units connected to both ends of the cable must be regarded as
being installed within the same cabinet. Suppose, for example, that a
CNC functioning as the host is installed in the operator's panel, a β
series servo amplifier (with the I/O Link option) is installed in the
power magnetics cabinet, and an I/O Link cable for connecting the
CNC with the β series servo amplifier is run through a duct. In this
case, the CNC and the β series servo amplifier (with the I/O Link
option) are regarded as being installed within the same cabinet.
- When the cable is run from one cabinet to another, and the cabinets
cannot be connected with each other via a ground wire of 5.5 mm
2
or
more
- When the cable is affected significantly by noise. For example, when
a powerful electromagnetic noise source such as a welding machine
is placed near the cable, or when the cable is routed for a long
distance in parallel with a power line or cable related to power
magnetics that generates noise