ProSoft Technology PTQ-PDPMV1 - Manual (Page 152)

Mailbox Messaging PTQ-PDPMV1 ♦ Quantum Platform
User Manual PROFIBUS DP Master Network Interface Module for Quantum
Page 152 of 306 ProSoft Technology, Inc.
August 12, 2014
6.1 Mailbox Message Queuing
The PTQ-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 PTQ 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
6.1.1 Queue Timeouts
The PTQ-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.