ProSoft Technology MVI56-PDPMV1 - Manual (Page 134)

Mailbox Messaging MVI56-PDPMV1 ♦ ControlLogix Platform
User Manual PROFIBUS DPV1 Master
Page 134 of 255 ProSoft Technology, Inc.
March 22, 2011
3.1 Mailbox Message Queuing
The MVI56-PDPMV1 module operates asynchronously on the Mailbox Messages
and as such provides for the queuing of the messages as they are received. The
queue sizes used in the module are as follows:
Queue Type Queue Size
Max Description
Output message from processor 126 Number of messages that the MVI56 module
will queue by type of message. Note that status
of the queues can be monitored via the Queue
Message Count values.
Input messages for processor 126
Alarm messages from slaves for
processor
100
3.1.1 Queue Timeouts
The MVI56-PDPMV1 module will only allow a message to stay in a queue for up
to 10 seconds. If the PROFIBUS Master (for output messages) or the processor
(for input and alarm messages) has not successfully received a message within
10 seconds, the module will clear the message out of the queue.