Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 95)

5–6 Communications Overview
Publication 2706-817
The Auxiliary Device uses the same RS-232 port that Message-
Builder software uses to download the application, but the port
parameters may be different.
•
See Page 10–27 for the procedure to configure the RS-232 port to
communicate with one of the auxiliary devices listed below.
•
See Page 5–3 for an outline of the procedure the terminal
operator uses to switch from one set of port parameters to the
other.
Note: Parameters for communication between the MessageView
terminal and the computer are built into the terminal firmware, and
cannot be edited.
ASCII Input device
A MessageView terminal with a RIO daughterboard and firmware
that supports ASCII Input, can accept data from an ASCII Input
device. Data from such a device is entered into ASCII or Numeric
Entry variables embedded in a message.
ASCII Input devices include the following:
•
bar code scanner
•
AdaptaScan

reader
•
PLC

port 0.
•
other devices with serial communication that can send ASCII
data.
To set up a terminal to communicate with an ASCII Input device, see
Page 10–27.
Slave Port (master device)
A MessageView terminal with a RIO daughterboard and firmware
that supports slaving can command up to 126 slave devices. The
slave devices display messages as they are commanded. Each slave
device may be addressed individually, or a command may be sent to
all slaves at the same time using node address 127.
Slave devices include:
•
Allen-Bradley Dataliner

DL10
•
Allen-Bradley Dataliner

DL20
•
Allen-Bradley Dataliner

DL50
•
MessageView 421D terminal without a daughterboard (Catalog
No. 2706-M1D). See Page 5–8 for the 421D Slave Device.
To set up a terminal as a master device to communicate with slave
devices, see Page 10–27.