ProSoft Technology MVI46-PDPMV1 - Manual (Page 64)

Mailbox Messaging MVI46-PDPMV1 ♦ SLC Platform
User Manual PROFIBUS DPV1 Master
Page 64 of 160 ProSoft Technology, Inc.
March 25, 2011
4.1 Mailbox Message Queuing
The MVI46-PDPMV1 module operates asynchronously on the Mailbox Messages
and as such provides for the queuing of the messages as they are received. The
following queue sizes are used in the module.
Queue Type Queue Size Max Description
Output message from
processor
126 Number of messages that the MVI46 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
500
4.1.1 Queue Timeouts
The MVI46-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.