Rockwell Automation 2711-ND3 PanelBuilder v2.60 Software User Manual - Manual (Page 62)

4–6 Communications Overview
Publication 2711-6.0
On a Remote I/O network, the PanelView Remote I/O terminals
appear like a Remote I/O rack. The PanelView terminal can occupy
all of or part of a single rack (128 I/O). You can assign 2 types of
addresses to objects on a Remote I/O network:
•
Discrete - a single input or output bit address
•
Block transfer - a series of contiguous word addresses
Data is transferred over a remote I/O link as either a:
•
Read or Input = data to the PLC from the PanelView
•
Write or Output = data from the PLC to the PanelView
The processor continually scans the PanelView terminal for inputs
and updates the outputs. Read and write tags must have different
discrete I/O addresses and are not linked in the terminal.
Rack Sizes and Module Groups
The PanelView I/O can occupy a 1 /
4
, 1 /
2
, 3 /
4
, or Full rack. Each 1/4
rack contains two module groups (32 input and 32 output bits). An
entire rack contains 8 module groups that are numbered from 0 to 7.
Rack # PanelView I/O
Four 1/4
Rack Sizes
Eight Input/Output
Module Groups
0 1 2 3 4 5 6 7
1/4 1/4 1/4 1/4
Input
Output
16 Bits each Module Group
0 1 2 3 4 5 6 7
If a PanelView terminal does not occupy a complete I/O rack, you
can assign another PanelView or other devices to the same rack.
Parameter 1st PanelView Other Rack Device
Rack Number 1 1
Starting Module Group 0 6
Rack Size 3/4 1/4
Last Chassis No Yes
The PLC type determines the maximum rack number for the
PanelView.
Remote I/O
Communications