Rockwell-automation 20-COMM-I Interbus Adapter Manual de usuario Pagina 71
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Using Explicit Messaging (PCP Communications) 6-9
Reading Pr. 21 [PIDD W0 Actual] from a 20-COMM-I
In the example ladder logic program, the user would load these
registers before calling the subroutine to perform the PCP read:
Echo of the Command Word (PCP Read)
Message
Command word = 4 = PCP Read (bit 2 ON)
N22:10
Command
4
4
SLC Address
Description
Value (Hex)
N22:22
N22:13
N22:12
N22:11
N22:23
Reply
2
4
-32,764
0
2
4
CR# = 2 (Station 1.0)
Sub Index not used
Number of words following = 4
CR# = 2 (Station 1.0)
2FCA
2
4
2
4
N22:21
0
8004
Value (Dec)
N22:20
Result = 0 (success)
N22:25
N22:26
0
12186
2
Number of bytes read = 2
Data word 2 not used
0
2F9A
2
N22:24
N22:27
0
0
"8000" (bit 15 ON) indicates Reply message present
Status word:
"0004" (bit 2 ON) echo's the command (PCP Read)
2FB6h is the start of the 20-COMM-I parameters (Pr.1)
Index =2FB5h+15h = Parameter 21 [PIDD W0 Actual]
15 hex = 21 dec = Parameter 21 [PIDD W0 Actual]
Data word 1 = 2F9A hex = Logic Status
12234
Message
CR# = 2 (Station 1.0)
N22:0
Request
2
2
SLC Address
Description
Value (Hex)
N22:1
1
1= 20-COMM-I
1
Value (Dec)
N22:3
21
15
Parameter # = 21 [PIDD W0 Actual]
20COMM-UM007A-EN-P.book Page 9 Tuesday, January 22, 2002 10:52 AM
- Interbus 1
- Table of Contents 2
- Important User Information 4
- About This Manual 5
- Rockwell Automation Support 6
- Summary of Changes 8
- Features 10
- Compatible Products 10
- Required Equipment 11
- Safety Precautions 12
- Quick Start 13
- Getting Started 15
- Installing the Adapter 17
- Installing the Adapter 2-3 19
- 2-4 Installing the Adapter 20
- Applying Power 22
- Configuring the Adapter 23
- Using the PowerFlex HIM 24
- Setting the I/O Configuration 25
- Setting a Fault Action 28
- Resetting the Adapter 29
- 10000xxx 30
- 01234576 30
- Configuring the Adapter 3-9 31
- 3-10 Configuring the Adapter 32
- Example Network 33
- Examples 35
- . Click OK when complete 44
- G File Data Information: 48
- Using I/O Messaging 51
- Understanding the I/O Image 52
- Using Logic Command/Status 54
- Using Reference/Feedback 54
- Using Datalinks 54
- Adapter Settings 56
- SLC Data Table 57
- Read Data 57
- Write Data 57
- 5-8 Using I/O Messaging 58
- Using I/O Messaging 5-9 59
- 5-10 Using I/O Messaging 60
- Using I/O Messaging 5-11 61
- 5-12 Using I/O Messaging 62
- Using Explicit Messaging 63
- (PCP Communications) 63
- Running Explicit Messages 64
- PCP Communications 65
- PCP Read Message Format 67
- Read Examples 69
- Description 70
- Value (Hex) 71
- Value (Dec) 71
- PCP Write Message Format 72
- Write Examples: 74
- CR# = 2 (Station 1.0) 75
- Parameter # = 6 75
- Parameter # = 12 76
- Protocol (PCP) 77
- Troubleshooting 85
- Troubleshooting 7-3 87
- Adapter Diagnostic Items 88
- Viewing and Clearing Events 89
- 7-6 Troubleshooting 90
- Troubleshooting 7-7 91
- 7-8 Troubleshooting 92
- Specifications 93
- Environmental 94
- Regulatory Compliance 94
- Adapter Parameters 95
- B-4 Adapter Parameters 98
- Adapter Parameters B-5 99
- B-6 Adapter Parameters 100
- Adapter Parameters B-7 101
- Table B.1 PIDD/PODD Indexes 101
- B-8 Adapter Parameters 102
- Logic Command/Status Words 103
- Logic Status Word 104
- Glossary 106
- Glossary-6 111
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