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Overview
This document outlines how to configure a Modbus interface between Zetron SCADA hardware and VTScada HMI software. It includes information from Zetron’s Modbus configuration guide.
Topics Covered - Section 1.0 Physical Equipment Setup - The typical setup herein pertains to a radio-linked Zetron 1700M base station communicating to various RTU’s (1708 or 1716). The setup supports polling and report by exception (RBE). The VTScada HMI computer is connected via a 9-pin serial cable to the 1700M.
- Section 2.0 Base Station/RTU Configuration - The 1700M is set for an “Auto polling” interval of 60 minutes with RTU storage “enabled”. The 1700M will poll each RTU every 60 minutes and accept any unsolicited RBE communications as well. VTScada polling tags are set for 60 second poll intervals. They poll the 1700M registers every 60 seconds for updates.
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