Hollysy FM151A Module

Hollysys FM151A Module New In Box Today

Overview

■ Monitoring and Control 

Layer OPS, ES, HIS and switch are included in this layer. This layer communicates with the lower layer through the redundant TCP/IP protocol Ethernet. It displays the processed field data to users and then transfers users’ operational command to lower layer. The devices including OPS, ES, CMS, HIS and printer are connect into a network by two switches. In order to guarantee the communication reliability of the system, some important devices such as HIS and switch are redundant configuration. 

■ Field Control Layer 

This layer consists of FCS, I/O modules, etc. FCS communicates with I/O devices through DP bus. I/O devices transfer the collected data to MCU. MCU processes the data according to the pre-downloaded algorithm and transfers the displayed data to the upper monitoring and control layer. The instructions from upper layer or FCS are also transferred to the field actuator. Field control layer supports HART and FF bus protocol through specialized hardware modules. 

■ SNET 

It is constituted by the 100M high-speed redundant network. It is used in the System History Station connecting to OPS, ES, controller and network printer. Also it can complete the data monitoring of the entire system and respond to various requests of operators, such as graphics switching, data display, trend display, report printing, screen copy, tables and log inquiries. 

■ CNET 

CNET communication is responsible for the connection between controller, input/ output modules, and intelligent devices. The real-time and secure communication is implemented through CNET. Both bus and star topologies are supported for flexible configuration.

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