Omron CQM1H-SCB41 operation manual NT Links -- 1N Mode, NT Links -- 11 Mode

Models: CQM1H-SCB41

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Protocol Overview

Section 1-2

Note A 4-wire connection must be used when using an RS-422A/485 port.

Serial Communications Board

CQM1H

CQM1H or other C-series PC

RS-232C

LR 00

to

LR 31

LR 32

to

LR 63

1-2-5 NT Links –– 1:N Mode

Master PC

Master area (sent)

Slave area (received)

LR 00 to

LR 31 LR 32

to

LR 63

Slave PC

Master area (received)

Slave area (sent)

A PC can be connected to one or more Programmable Terminals (PTs) using an RS-232C or RS-422A/485 port. The I/O memory of the PC is allocated to the Status Control Areas and the Status Notification Areas used by the PTs, as well as to display objects, such as touch switches, lamps, and memory tables. This enables the status of the I/O memory in the PC to be controlled and monitored by operations from the PTs, without the use of a ladder diagram programming in the PC. Up to eight PTs can be connected to a PC.

Note The user does not need to be aware of NT Link commands. The user only has to allocate the PC memory to the PTs.

Serial Communications Board

Serial Communications Board

CQM1H

CQM1H

 

1:1

 

1:N

 

 

RS-422A/485

PT

 

 

 

PT

PT

1-2-6 NT Links –– 1:1 Mode

The functionality of the 1:1 mode is the same as that of the 1:N mode, but only a 1:1 connection is possible. The 1:1 and 1:N modes are not compatible as proto- cols.

Serial Communications Board

CQM1H

1:1

PT

7

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Omron CQM1H-SCB41 operation manual NT Links -- 1N Mode, NT Links -- 11 Mode