User manual

Reference PTQ-PDPMV1 ♦ Quantum Platform
User Manual PROFIBUS DP Master Network Interface Module for Quantum
Page 248 of 306 ProSoft Technology, Inc.
August 12, 2014
9.2 Functional Overview
9.2.1 About the PROFIBUS Protocol
PROFIBUS (Process Field Bus) is a widely-used, open-standards protocol
created by a consortium of European factory automation suppliers in 1989.
PROFIBUS is a Master/slave protocol. The Master establishes a connection to
one or more remote slaves. When the connection is established, the Master
sends the PROFIBUS poll messages (called telegrams in PROFIBUS) to the
slave or slaves. The PTQ-PDPMV1 module works as a Master only. It cannot be
a slave to some other Master.
The PTQ-PDPMV1 module also acts as an input/output module between devices
on a PROFIBUS network and the Schneider Electric Quantum processor. The
module uses an internal database to pass data and mailbox requests and
responses between the processor and the slave devices on the PROFIBUS
network.
PROFIBUS specifications include a variety of network types. The network type
supported by the PTQ-PDPMV1 module is PROFIBUS DP version 1.0, which is
designed for remote I/O systems, motor control centers, and variable speed
drives.
9.2.2 General Overview
The PTQ module communicates with the processor over the backplane using
only the following two blocks of data:
 PTQ Input Data block
 PTQ Output Data block
This section of the manual describes the data structures and transfer
mechanisms used to transfer data between the PTQ-PDPMV1 module and the
Quantum processor.
The following illustration shows the Input/Output Data block flow between the
Quantum processor and the PTQ-PDPMV1 module.