B&B Electronics 485T Manual do Utilizador descarregar pdf (Página 15)

Owners Manual

2800 Series Marquee

1.13 Enabling RS-232 Echo (SW1)

If you are using RS-232 communications, and you would like the marquee to echo every character received back

to the PC/PLC, set switch 8 on the SW1 dip switch block to the ON position. To disable RS-232 echo, set switch

8 to the OFF or OPEN position.

Note: When using RS-485 communications wiring, RS-232 Echo should be turned OFF. If RS-232 Echo is

enabled, the RS-485 transmitter is disabled.

1.14 Setting the Baud Rate (SW2)

All of the devices connected to a serial communications cable must be configured to transmit data with the same

baud rate and character format. 2800 marquees support communicating at all standard baud rates ranging from

150bps to 19200bps. However, 2800s only support the “eight data bits, no parity, one stop bit” character format.

Your PC/PLC serial port must be configured to match the 2800 communication settings, or the PC/PLC will not be

able to send commands to the marquee(s).

The desired baud rate is set by switches 1 through 3 on the SW2 dip switch block, as shown in the table below.

To configure the 2800 marquee to transmit and receive serial data at 9600bps, set switch 1 to the ON position

and leave switch 2 and switch 3 in the OFF or OPEN position.

NOTE: Some dip switch blocks label the OFF position as OPEN.

3 2 1 Baud

OFF OFF OFF 19200bps

OFF OFF ON 9600bps

OFF ON OFF 4800bps

OFF ON ON 2400bps

ON OFF OFF 1200bps

ON OFF ON 600bps

ON ON OFF 300bps

ON ON ON 150bps

PB-2149-335B Page 11

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B&B Electronics 485T Manual do Utilizador Página 15