ProSoft Technology PTQ-PDPMV1 - Manual (Page 167)

PTQ-PDPMV1 ♦ Quantum Platform Mailbox Messaging
PROFIBUS DP Master Network Interface Module for Quantum User Manual
ProSoft Technology, Inc. Page 167 of 306
August 12, 2014
Command and Response Layout: Acyclic Read
Command Response
Message ID (ID) (ID)
Message information 0240h 0200h
Command 2000h 2000h Acyclic Read
Data size 0000h (Size of data) Number of data bytes (n)
Frame count 0100h 0100h
Frame number 0100h 0100h
Offset high 0000h 0000h
Offset low 0000h 0000h
Extended word 1 Slot Slave Addr. Slot Slave Addr.
Extended word 2 Length Index Length Index
Extended word 3 - -
Extended word 4 - -
Extended word 5 - Error
Decode
Extended word 6 - Error Code 2 Error Code 1
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
Message Information
Refer to Message Information (page 180).
Slave Address
Station address of the slave responder.
Slot Number and Slot Index
Used in the slave to address the desired data block.
Length
This parameter specifies the number of bytes of the data block that have to be
read. If the server data block length is less than requested, the length of the
response will be the actual length of the data block. If the server data block is
greater or equal, the response will contain the same amount of data.
The slave may answer with an error response if data access is not allowed.