ProSoft Technology MVI69-PDPMV1 - Manual (Page 106)

Mailbox Messaging MVI69-PDPMV1 ♦ CompactLogix or MicroLogix Platform
User Manual PROFIBUS DPV1 Master
Page 106 of 225 ProSoft Technology, Inc.
July 8, 2011
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 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 - -
Extended word 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