Rockwell Automation 1734-485ASC POINT I/O ASCII User Manual - Manual (Page 20)

Publication 1734-UM009B-EN-P - July 2003
1-10 Installing the ASCII Module
How to Write Serial Output
Data to the ASCII Module 1. Connect to the ASCII module from your configuration tool.
2. Connect the serial side of the ASCII module to your computer’s
serial port or another serial device.
3. Go to the device configuration screen in the configuration tool.
4. Make sure that the ASCII module is in the default factory
configuration.
5. Set the baud rate and framing format of the serial port to the
baud rate and framing format of the serial device that you are
using.
6. Enter the serial data that you wish to send in the transmit data
parameter and choose apply.
7. Change the length of the data in the length byte to reflect the
length you wish to send and choose apply.
8. Change the transmit transaction ID and choose apply.
The ASCII module will generate the characters you typed on the
computer screen.
Poll messages work in the same manner as the parameter object
interface.
Table 1.3 Default Transmit Data Assembly Format (Default Mode)
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5-23 Byte 24
Reserved TX Transaction ID
Byte
Reserved Length ASCII Data <CR>
(Terminator)