ProSoft Technology MVI69-PDPMV1 - Manual (Page 181)

MVI69-PDPMV1 ♦ CompactLogix or MicroLogix Platform Reference
PROFIBUS DPV1 Master User Manual
ProSoft Technology, Inc. Page 181 of 225
July 8, 2011
Input Mailbox
This block contains the actual mailbox response sent by the PROFIBUS slave to
the module.
240 Words Block Format for Mailbox In Message (Input Image)
When the Block Transfer Size = 240, it takes only one Output blocks to form one
mailbox message request. There are ten block ID numbers to choose from and
there is no special significance to any particular number.
The customer's application logic may use any of the block IDs between 100 to
109 to send the mailbox request. As an acknowledgment that the request was
received, each Output block will be responded to with a corresponding Input
block containing the same ID number.
However, when the Input block containing the slave response to the request (if
any) is returned to the processor, it may or may not show an Input Block ID that
is the same as that contained in the original requesting Output block. In this case,
the Input block ID may be any number in the valid range of 100 to 109.
Word Offset
Start End Name Description
0 0 Block ID Block number 100 to 109 (May not be the same as
the original requesting Output Block ID.)
1 1 Output Index Index of Output image to receive (1 to 4 for data, 0 or
-1 if no data)
2 145 Mailbox Message Mailbox input message from module
146 241 Reserved Reserved for future use