Understanding rack and block transfer assignments, Starting module groups and fractional racks, Planning your application chapter 4 – Rockwell Automation 2711 PANELBUILDER SOFTWARE USER MANUAL User Manual

Page 78

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background image

Planning Your Application

Chapter 4

4-3

Figure 4.1

Screen with Alarm Window Covering Buttons

22005

Alarm Message 6

01:06:53 01/15/92

Alarm Message 5

01:06:53 01/02/92

Alarm Message 4

01:06:53 01/02/92

Alarm Message 3

01:06:53 01/02/92

Alarm Message 2

01:06:53 01/02/92

Alarm Message 1

01:06:53 01/02/92

Cursor

Up

Acknowl

Alarm

Cursor

Down

--FRONT

--FRONT

CENTER

--BACK

CENTER

CENTER

--BACK

_ ON

_ ON

_ ON

_ ON

_ ON

IMPORTANT: As a safety feature, buttons are momentarily disabled
after screen changes. Also, whenever a new screen appears, all buttons
must be released before any button will respond.

Rack and block transfer assignments for a PanelView terminal follow the
same basic rules as standard Allen-Bradley 1771 I/O racks. For detailed
information on rack and block assignment, refer to the 1771 SN Sub I/O
Scanner Data Sheet.

Any available rack number(s) can be assigned to a PanelView terminal,
assuming, of course, that the assignment is valid for the type of host PLC
controller and Remote I/O Scanner in the PLC System. A PanelView
terminal can occupy up to eight different rack numbers and can also
support fractional rack assignments.

IMPORTANT: Each rack assignment adds 5 to 7 milliseconds to the
remote I/O scan time.

Each rack can support up to 8 module groups (numbered 0–7). However,
PanelView can only support 1/4, 1/2, 3/4, and FULL rack sizes. Therefore,
the starting module groups are 0, 2, 4, and 6. Each module group supports
16 inputs and outputs which correspond to a 16-bit PLC I/O image table
word.

Understanding Rack and Block

Transfer Assignments

Starting Module Groups and

Fractional Racks

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