Unit Components

Section 2-2

 

 

 

2-2-5 CompoBus/S I/O Link Unit Components

 

2.

DIP switch

 

3.

LED indicators

 

5.

Expansion connector

4. Expansion I/O Unit Connecting Cable

1. CompoBus/S terminals

1, 2, 3... 1. CompoBus/S Terminals

NODE ADDRESS

 

HOLD

1 2 4 8

DR

ON

SW1

Note

! Caution

Include the CompoBus/S communications data high/low terminal, commu- nications power supply +/– terminals, and NC terminals. Power is supplied to the Unit internally, so the power supply terminals can be used as relay terminals.

2.DIP Switch

The DIP switch sets the Unit’s node address, sets the communications mode, and determines whether or not the outputs will be cleared in the event of a communications error.

Pin(s)

 

 

Function

 

 

 

1 to 4

These pins set the Unit’s node address using the DIP switch pins as

(labeled

binary digits. (1 = ON)

 

 

1, 2, 4,

0: 0000

1: 0001

2: 0010

3: 0011

and 8)

4: 0100

5: 0101

6: 0110

7: 0111

 

 

8: 1000

9: 1001

10: 1010

11: 1011

 

12: 1100

13: 1101

14: 1110

15: 1111

 

 

 

DR

ON: Long-distance Communications Mode

 

 

OFF: High-speed Communications Mode

 

 

(See note.)

 

 

 

 

 

HOLD

ON: Retain outputs when a communications error occurs.

 

OFF: Clear outputs when a communications error occurs.

The Long-distance Communications Mode can be used only when connected to one of the following Master Units: C200HW-SRM21-V1, CQM1-SRM21-V1, or SRM1-C0j-V2.

3.LED Indicators

These indicators show the status of CompoBus/S communications.

Indicator

Status

Meaning

 

 

 

COMM

ON

Communications in progress.

(yellow)

 

 

OFF

Communications error or stopped.

 

 

 

 

ERR

ON

A communications error has occurred.

(red)

 

 

OFF

Indicates normal or no communications.

 

 

 

 

4.Expansion I/O Unit Connecting Cable

Connects the CompoBus/S I/O Link Unit to the Expansion Connector on the PC’s CPU Unit or another Expansion Unit.

Do not touch the Expansion I/O Unit Connecting Cable while the power is being supplied in order to prevent any malfunction due to static electricity.

5. Expansion Connector

Connects to another Expansion Unit (Expansion I/O Unit, Analog I/O Unit, or CompoBus/S I/O Link Unit). Up to 3 Expansion Units can be connected to a CPU Unit.

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Omron CPM1A operation manual CompoBus/S I/O Link Unit Components, Pins Function