Proface APL3000B - Node Box PC Bedienungsanleitung PDF herunterladen (Seite 52)

Chapter 2 Specifications

2-29

Serial Mode Select Switches (SW4 to SW10) operate as shown in the circuit diagram below.

Changes TX data's

output mode

TX data output is

controlled via the

RTS signal.

TX data output is

NOT controlled

via the RTS

signal. (normally

output)

OFF ON/OFF ON/OFF

Switches the TX

termination

resistance ON/OFF

Inserts

termination

resistance of

220Ω between

TXA and TXB.

No termination OFF ON ON/OFF

Switches the RX

termination

resistance ON/OFF

Inserts

termination

resistance of

220Ω between

RXA and RXB.

No termination OFF ON ON/OFF

Switches the

shorting of TXA

and RXA ON/OFF

Shorts TXA and

RXA.

(RS-485 mode)

No shorting

(RS-422 mode)

OFF OFF ON

Switches the

shorting of TXB

and RXB ON/OFF

Shorts TXB and

RXB.

(RS-485 mode)

No shorting

(RS-422 mode)

OFF OFF ON

9 RTS Automatic

control mode

(enabled only when

RS-485 mode)

The data is

automatically

controlled via the

RTS signal.

The data is not

automatically

controlled via the

RTS signal.

OFF OFF ON/OFF

10 OFF OFF ON/OFF

Table2) Serial Mode Select Switches

*1 Be sure to keep the settings, "OFF" for RS-422 or RS-485.

*2 If you use the termination resistance, base your settings on the connection specifications.

*3 To control TX output driver via RTS automatically, set ON. Be sure to set SW No.4 OFF.

To control TX output driver via RTS signal, set OFF. Be sure to set SW No.4 ON.

Switch

Number

Description ON OFF RS-232C RS-422 RS-485

TXD

RTS

SW4

SW9

SW10

SW5

SW7

SW6

SW8

TXA

TXB

RXA

RXB

RTS Automatic control

COM2

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 94 95

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