Rockwell-automation 20-COMM-I Interbus Adapter Manual de usuario descargar pdf (Pagina 76)

6-14 Using Explicit Messaging (PCP Communications)

Writing Pr. 12 [Flt Cfg A1] to a 20-COMM-I

In the example ladder logic program, the user would load these

registers before calling the subroutine to perform the PCP Write:

Message

Command word = 8 = PCP Write (bit 3 ON)

N23:10

Command

SLC Address

Description

Value (Hex)

N23:20

N23:13

N23:12

N23:11

N23:21

2048

-32,760

CR# = 2 (Station 1.0)

Sub Index not used

Number of words following = 2

CR# = 2 (Station 1.0)

2FC1

800

8008

N23:16

Value (Dec)

Result = 0 (success)

N23:23

N23:22

N23:24

"8000" (bit 15 ON) indicates Reply message present

Status word:

"0008" (bit 3 ON) echo's the command (PCP Write)

2FB6h is the start of the 20-COMM-I parameters (Pr.1)

Index = 2FB5h+Ch = Parameter 12 [Flt Cfg A1 In]

C hex = 12 dec = Parameter 12 [Flt Cfg A1 In]

Echo of the Command Word (PCP Write)

N23:14

N23:15

00000800 hex = 2048 decimal

4 bytes of data following

12225

Message

CR# = 2 (Station 1.0)

N23:0

Request

SLC Address

Description

Value (Hex)

N23:1

1= 20-COMM-I

Value (Dec)

N23:2

Parameter # = 12

N23:3

N23:4

N23:5

2048

800

4 byte data write

Data Word 1 = 0

Data Word 2 = 2048

20COMM-UM007A-EN-P.book Page 14 Tuesday, January 22, 2002 10:52 AM

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Rockwell-automation 20-COMM-I Interbus Adapter Manual de usuario Pagina 76

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