Mailbox Message: Acyclic Data Read: Class 1 - ProSoft Technology inRAx MVI56-PDPMV1 User Manual

Mailbox Messaging
User Manual

3.14 Mailbox Message: Acyclic Data Read: Class 1

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
Message Information
Refer to Message Information (page 135).
Slave Address
Station address of the slave responder.
Page 150 of 235
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
-
-
-
-
-
-
MVI56-PDPMV1 ♦ ControlLogix 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.
November 8, 2010