GE Series 90-70 manual Master or Slave Operation

1

Master or Slave Operation

When used as a master, an I/O Link Interface Module can receive up to 1024 discrete inputs from devices on the I/O Link, and send up to 1024 discrete outputs. Potential slave devices include the Series 90±30 PLC and the Power Mate CNC.

When used as a slave, the Series 90±70 I/O Link Interface Module can receive up to 64 discrete inputs from the master, and send up to 64 discrete outputs. The master may be another Series 90±70 PLC, a Series 15, Series 16, or Series 18 CNC, a Series 0 Model C CNC, or an F±D Mate CNC. The Series 90±70 PLC and Series 0 CNC can be used as either master or slave.

In the example system shown below, the Series 90±70 PLC shown at the top functions as an area controller for three machine cells. The area controller has two I/O Link Interface Modules, each of which operates as an I/O Link master.

SERIES 0 CNC

POWER MATE POWER MATE

AREA CONTROLLER

SERIES 90±70 PLC

I/O LINK

I/O LINK

I/O LINK

SERIES 90±70 PLC

	I/O LINK	I/O LINK		I/O LINK
I/O LINK			I/O LINK

a45002

CELL #3

I/O LINK

POWER MATE POWER MATE

SERIES 0 CNC

SERIES 90±30 PLC

CELL #1

SERIES 90±30 PLC

CELL #2

SERIES 90±30 PLC

In this system, the left I/O Link from the area controller goes to cell 1, where a Series 0 CNC, two single±axis Power Mate CNCs, and a Series 90±30 PLC are the slaves. They control the operations of a large machine and its auxiliary equipment. The right I/O Link from the area controller goes to another Series 90±70 PLC. That PLC serves as a slave on the link to the area controller, and as a master on two other links to smaller machine cells. In cell 2, a Series 0 CNC and a Series 90±30 PLC are the slaves. In machine cell 3, the slaves are a Series 90±30 PLC and two Power Mate CNCs.

2 Series 90t-70 I/O Link Interface Module User's Manual ± February 1993 GFK-0644A