DSE Gencomm DSE7300 Series Schnellstart-Handbuch
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Gencomm Control Keys and Remote Control Outputs
• DESCRIPTION
This document describes how to send System Control Keys and Remote Control Outputs to DSE Modbus enabled
controllers. These functions allow 'remote control' over the DSE module from any Modbus Master (such as a PLC,
Building Management System, PC or other embedded control system with Modbus Master functionality).
The complete DSE Gencomm Modbus Register Mapping specification document is obtainable from DSE upon request
by email to [email protected].
• CONNECTIONS
Ensure you are using the RS485 version of the DSE5500 series controller or if you are using the DSE7300 / DSE7500
series, ensure the RS485 port has been selected in the module configuration.
Connect the controllers to the PLC using industry standard RS485 cabling. DSE recommend and supply BELDEN
9841 cable for RS485 use (DSE part number 016-030)
Remember that termination resistors must be correctly fitted and that the cable length must not exceed 1.2km (For
cables other than Belden 9841, the maximum length may be different, depending upon cable specifications.
Use the DSE Config Suite (For DSE Controllers with a USB connection), Link7000 software (for 7500 series) or
Link5000 (for 5500 series), to set the baud rate and slave address of the controller to match your PLC program.
For further details, refer to the DSE Gencomm document and the module's operator manual and configuration software
manual.
• CONTROL
Control is performed by sending System Control Keys to the module, and also sending the bitwise opposite (or one's
compliment) of the control key to another register 'in the same write operation' for security.
To modbus register 4104 (decimal) write the system control key as below
To modbus register 4105 (decimal) write the compliment of the system control key as below
Both of these registers MUST be written to the controller at the SAME TIME using the SAME MODBUS WRITE
COMMAND.
A table of Control Keys and the ones compliment of the keys is included overleaf.
056-051 Gencomm Control Keys Issue 3 – A.D.Manton