Yamaha SRCD Bedienungsanleitung PDF herunterladen (Seite 15)

CHAPTER2 CC-Link Unit

2-2 CC-Link system concept

In order to understand how the controller and sequencer (PLC) operate on the CC-Link

system, let’s first take a look at how the system communicates.

Each equipment connected in the CC-Link system is classified according to function as

a master station, remote device station, remote I/O station, etc. The master station is a

station for supervising the entire CC-Link system and can be considered the PLC (se-

quencer) master unit. The remote device station is controlled by the master station, and

exchanges bit data and word data with the master station. The remote I/O station, like the

remote device station is also controlled by the master station but differs from the remote

device station in that the only data it handles is bit data.

The controllers equipped with the CC-Link unit function as remote device stations.

Master Station

This station controls the entire CC-Link system.

This is equivalent to a master sequencer (PLC) unit.

Remote Device

Station

This station is controlled

in the CC-Link system by

the master station.

Remote I/O

Station

This station is controlled

in the CC-Link system by

the master station.

Controllers

CC-Link unit

These function as remote device

stations.

q The controller on/off information is sent to the master station via the information

network (CC-Link system cable). Moreover, the response from the controller against

the message (remote command) is also similarly sent to the master station via the

network.

w Master station sequencer (PLC) on/off information is sent to the controller via the

information network (CC-Link system cable). Moreover, the message (remote com-

mand) from the master station is also similarly sent to the master station via the

network.

*The controller monitors the on/off information and message (remote command) at

10 millisecond intervals.

MEMO

Communication speed and station numbers are set from the HPB.

ON/OFF information handled by the CC-Link unit comes through 32 general-purpose I/

O pins and 16 Dedicated I/O pins (for 2 stations).

ON/OFF information in the robot program is handled by DO statements, WAIT state-

ments, and JMPB statements. (Serial input/outputs (I/O) for the CC-Link are assigned

using I/O numbers from 200 onwards.) Designated I/O ports can be controlled indepen-

dently of the program by making emulated serialization settings on the parallel I/O.

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