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Troubleshooting Serial Connections

RS232 Control 51

Troubleshooting Serial Connections

There are many small details involved in getting an entire wall or group of tiles to

communicate over a serial link. By starting with simple commands you can ensure all

these details are in place before moving on to more complex control. If you are

setting up a wall or group of tiles for the first time, follow these steps for easy setup. If

you have problems later, you can refer to the troubleshooting flowcharts starting on

page 53 as necessary.

Setup

1 Connect the RS232 cable from the computer to the RS232 In connector of Quad

Input Manager Module A. Connect the out connector of that tile, to the In

connector of the next tile and so on until all tiles are connected.

2 Each tile in the wall has a unique ID. The tile’s group ID is the ID of the Quad Input

Manager Module to which it’s connected (A-P). The tile’s unit ID is the output

number to which it is connected (1-4).

3 Set the baud rate of the host computer to 19200. If this is not possible, set the

baud rate of each tile to match the baud rate of the host computer. The baud rate

is not set automatically. If the baud rate of a tile does not match the baud rate of

the computer, communication will not happen.

4 Open a program on the host that allows you to easily type commands. Serial Talk,

available from our website, is one such program. Be sure you know how to send a

carriage return character with whatever program you are using. All commands to

the tiles must end in a carriage return. The rest of this document will use Serial

Talk syntax in the examples.

Global Command

1 Send the command op ** pattern=red ^M

2 Did all tiles in the wall put up a red test pattern?

a If yes, go on to send individual commands.

b If none of the tiles responded, go to Global Command to First Tile on page 53.

c If the first tile went red, but one or more of the others didn’t, go to Global

Command to Subsequent Tiles on page 54.

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Runco RS232 Guía de instalación Pagina 51