Rockwell Automation 2755 AdaptaScan Software - Manual (Page 115)

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Publication 2755-838
Scanner Protocol
For most applications this check box should be cleared. Select the
Scanner Protocol check box only when you need to:
•
Configure a Reader using a computer connected to a serial port in
the Reader’s wiring base.
•
Use Allen-Bradley APM (Application Protocol Messages)
protocol to configure a Reader. APM protocol is often used by
system integrators who want to design custom applications
without using the AdaptaScan Configuration software. Contact
Allen-Bradley for additional information on APM protocol.
Baud Rate
Specifies the baud rate of the serial port. Set the baud rate to match
the device you are communicating with.
Maximum Length
Specifies the maximum length of data (in bytes) that is transmitted or
received. Specify a maximum length when the device the Reader is
communicating with has a limited buffer for receiving messages.
The Reader will truncate messages sent or received that are greater
than the specified length. A length of 0 disables length checks.
Parity
Specifies the parity used by the Reader when sending messages.
Select None, Even or Odd. None is the default for Terminal and
DF1 protocols. Parity is automatically set to Even for DH-485
protocol.
Data Bits
Specifies the number of data bits sent with each message from the
Reader. The default is 8. Data bits only applies to terminal protocol.
For DH-485 and DF1 protocols, the data bits are automatically set
to 8.
Stop Bits
Specifies the number of stop bits sent with messages from the
Reader. The default is 1 for Terminal and DF1 protocols. Stop bits
is automatically set to 1 for DH-485 protocol.