Mailbox Message: Class 1 Acyclic Data Read - ProSoft Technology inRax MVI69-PDPMV1 User Manual

Mailbox Messaging
User Manual

4.4.9 Mailbox Message: Class 1 Acyclic Data Read

This command initiates a DPV1 Class 1 acyclic read request. Refer to EN50170
(DPV1) for more information.
Parameter
Command Initiator
Command Name
Command Number
Fragmented
Extended Header Data
Command and Response Layout: Acyclic Read
Message ID
Message information
Command
Data size
Frame count
Frame number
Offset high
Offset low
Extended word 1 Slave Addr.
Extended word 2
Extended word 3
Extended word 4
Extended word 5
Extended word 6
Extended word 7
Extended word 8
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Description
Application
MSAC1 READ
2000h
No
Fault information may be returned in the header of the response.
Command
(ID)
4002h
0020h
0000h
0001h
0001h
0000h
0000h
Slot Number
Index Length
-
-
-
-
-
-
MVI69-PDPMV1 ♦ CompactLogix or MicroLogix Platform
Response
(ID)
0002h
0020h Acyclic Read
(Size of data) Number of data bytes (n)
0001h
0001h
0000h
0000h
Slave Addr. Slot Number
Index Length
-
-
Error
Decode
Error Code 1 Error Code 2
Extended Fault information
Fault Information
Data 1 Response Data byte 1
Data 2 Response Data byte 1
Data 3 Response Data byte 1
... ...
Data n Response Data byte 1
PROFIBUS DPV1 Master
ProSoft Technology, Inc.
July 8, 2011