Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual User Manual

Page 365

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Report Generation

Chapter 23

23-14

You can display any of the six messages when the corresponding bit 10-15
of word 027 is latched on. An example program to display one of the
messages 1-6 is shown in Figure 23.4. Three programming rungs are
required to display each stored message. The rungs must be programmed
in the order shown.

Figure 23.4

Example Program For Displaying Messages (1Ć6)

265

04

L

027

10

027

16

Event

Bit

Busy

Request Bit

Message (1)

Bit

Storage

U

027

10

Request Bit

Message (1)

Bit

Storage

027

Bit

Done

17

RUNG 1

RUNG 2

RUNG 3

Additional Messages

The upper byte of each message control word contains the request bits for
eight messages.

Figure 23.5

Bit Address and Message Number Relationship

0

1

2

3

4

5

6

7

201

010-017

110-117

210-217

310-317

410-417

510-517

610-617

710-717

202

203

204

205

206

207

210

Control Word

Control Word

Message

Numbers

Address

Number

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