Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 104)

5–15 Communications Overview
Publication 2706-817
The options in this dialog are:
Remote I/O
Device
Remote I/O
Parameter
Description Options
PLC/Scanner Type
Type of controller that will
communicate with the RIO
port of the terminal
See Table on
Page 5–14
Name
Unique name assigned to
controller. Enter it in the
Node Name field in the Tag
Editor
User assigns it
Terminal Rack Address
Unique node address of
MessageView 421 terminal
on Remote I/O link
0-76
octal
Module Group
Module groups occupied by
the terminal in the rack; they
must be next to one another
0,1 2,3 4,5 6,7
Baud Rate
The baud rate of the RIO
link determines the
maximum cable length. 57.6 K to 10,000 ft.
115.0 K to 5,000 ft.
230.4 K to 2,500 ft.
Last Chassis
Specifies whether the
terminal occupies the
highest assigned module
group within the rack
Yes, No
To configure Remote I/O:
Parameter Range Default
Rack Number 0 to 76
octal
(0 to 62
decimal
) 02
octal
(4
decimal
)
Rack Size 1 /
4
, 1 /
2
, 3 /
4
, Full Full
Last Chassis Yes, No Yes
Starting Module Group 0, 2, 4, 6 0
Pass-Through (This option is not available.)
Block Transfer Enabled, Disabled Disabled
Baud Rate 57.6K, 115.2K, 230.4K 57.2K
Number of Files in Block
Transfer
1
Number of Bytes in
Block Transfer
128
Use Block Transfer
Length
Number of Bytes of
Discrete I/O
16
Discrete I/O addresses communicate directly with the PLC (or other
logic controller). Discrete I/O is recommended for any critical values
that you want updated immediately.
The number of I/O points in the PLC rack is limited to 16 bytes (128
bits). In planning a large application assign tag addresses of variables
that are less time-sensitive to block transfer. Use copies of the Tag
Address worksheet in Appendix H to help design the application.
Discrete I/O