Mailbox Message: Class 2 Acyclic Data Read - ProSoft Technology inRax MVI69-PDPMV1 User Manual

Mailbox Messaging
User Manual

4.4.12 Mailbox Message: Class 2 Acyclic Data Read

This command issues a Class 2 DPV1 acyclic read request to a slave. Prior to
issuing this command, a connection to the slave must have been established,
see Initiate Class 2 Connection (page 110).
Parameter
Command Initiator
Command Name
Command Number
Fragmented
Command and Response Layout: Class 2 Acyclic Read
Message ID
Message information
Command
Data size
Frame count
Frame number
Offset high
Offset low
Extended word 1
Extended word 2
Extended word 3
Extended word 4
Extended word 5
Extended word 6
Extended word 7
Extended word 8
Page 116 of 225
Description
Application
FB_APPL_MSAC2_READ
0027h
No
Command
(ID)
4002h
0027h
0000h
0001h
0001h
0000h
0000h
C_REF
Slot Index
Length -
-
-
-
-
-
MVI69-PDPMV1 ♦ CompactLogix or MicroLogix Platform
Response
(ID)
0002h
0027h Class 2 Acyclic Read
(data size) Number of data bytes (n)
0001h
0001h
0000h
0000h
C_REF
Slot Index
Length -
-
Error
Decode
Error Code 1 Error Code 2
Extended Fault information
Fault Information
Read Data 1 Response Data byte 1
Read Data 2 Response Data byte 2
Read Data 3 Response Data byte 3
... ...
Read Data n Response Data byte n
PROFIBUS DPV1 Master
ProSoft Technology, Inc.
July 8, 2011