ProSoft MVI56-PDPMV1 - Mailbox Message: Class 1 Acyclic Data Read

Mailbox Messaging MVI56-PDPMV1 ♦ ControlLogix Platform
User Manual PROFIBUS DPV1 Master
Page 158 of 251 ProSoft Technology, Inc.
3.5.6 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
Description
Command Initiator
Application
Command Name
MSAC1 READ
Command Number
2000h
Fragmented
No
Extended Header Data
Fault information may be returned in the header of the response.
Command and Response Layout: Acyclic Read
Command
Response
Message ID
(ID)
(ID)
Message information
4002h
0002h
Command
0020h
0020h
Acyclic Read
Data size
0000h
(Size of data)
Number of data bytes (n)
Frame count
0001h
0001h
Frame number
0001h
0001h
Offset high
0000h
0000h
Offset low
0000h
0000h
Extended word 1
Slave Addr.
Slot Number
Slave Addr.
Slot Number
Extended word 2
Index
Length
Index
Length
Extended word 3 to 4
-
-
Extended word 5
-
Error
Decode
Extended word 6
-
Error Code 1
Error Code 2
Extended word 7
-
Extended Fault information
Extended word 8
-
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