Comtrol Modbus TCP User Guide - Manual (Page 85)

DeviceMaster UP Modbus/TCP User Guide: 2000447 Rev. I Appendix A. Programming the PLC via Concept - 85
Appendix A. Programming the PLC via Concept
A.1. Overview
After reviewing Chapter 2. Programming Interface on Page 17, you can use information in the A.2. Concept
Program Screens subsection on Page 86 to help set up your PLC and program the various messages.
A.1.1. What is Concept?
Concept is the PLC programming software package designed to support the Schneider Electric Momentum,
Quantum, and Compact PLCs. It does not support any other Schneider Electric PLC or any other
manufacturers PLC. However, the example PLC program and installation process may be helpful when
working with other PLCs
A.1.2. Requirements
The following requirements must be met to run the example programs.
• The Modbus/TCP firmware must be installed on the DeviceMaster UP and configured as described in the
DeviceMaster UP Hardware Installation and Configuration Guide .
• The DeviceMaster UP must be installed on the same Ethernet network segment as the PLC.
• Concept must be installed on your computer.
• The instructions in this guide require that you have some familiarity with this programming application.
• A loopback plug is required for the first port on the DeviceMaster UP when running an example PLC
program. See the
DeviceMaster UP Hardware Installation and Configuration Guide , for more information
if you need to build loopback plugs.
The PLC program examples ( A.2.3.1. LPBKCNCP on Page 94 and A.2.3.2. SCANCNCP on Page 94) are
optional. You can copy the PLC program examples from the CD or download the latest program examples
from the Internet.
A.1.3. Example Program Considerations (Raw Data)
The example programs are for raw data only.
• While the receive and transmit sequence numbers are cleared on the DeviceMaster UP at the start of the
program, the only requirement is that the sequence numbers be in sync between the PLC and
DeviceMaster UP.
• The DeviceMaster UP should be reset before starting SCANCNCP example program due to PLC program
execution scheduling. If the DeviceMaster UP is not reset, the sequence numbers may be out of sync. This
may result in receiving outdated serial data as well as an unexpected transmission of serial data. A
Transmit Unexpected Sequence Number error may also occur.
Statistics retrieval is not included in the example programs, but can be easily added by inserting a request
statistics message.