A4H254-8F8T

Product Details

Product Description

Product Description
Brand: FOXBORO
Type:A4H254-8F8T
Origin: the United States
Warranty: 365 days
Colour: new/used
Shipping method: Courier delivery
Module of PLC, DCS, ESD system card, the card is a vibration monitoring system, steam turbine control system module, the advantages of the gas generator spare parts brand: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts of our products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, mechanical, electronic manufacturing, automobile manufacturing, plastic machinery, electric power, water conservancy, water treatment/environmental protection, boiler heating, energy, power transmission and distribution and so on.
Modbus Communication The 505E control can communicate with plant distributed control systems (DCS) and/or CRT based operator control panels through two Modbus communication ports. These ports support RS-232, RS-422, or RS-485 communications using ASCII or RTU MODBUS transmission protocols. Modbus utilizes a master/slave protocol. This protocol determines how a communication network’s master and slave devices establish and break contact, how a sender is identified, how messages are exchanged, and how errors are detected. Monitor Only The two Modbus communication ports, as defaulted from the factory, are not configured to accept “write” commands. Although these ports are not configured, they continue to update all information to all registers. This allows the 505E to be monitored but not controlled from an external device. By simply connecting a monitoring device, configured to communicate through Modbus, this device can be used to monitor all the 505E’s controlling parameters, modes, etc. without effecting control of the turbine. To use a 505E port to only monitor 505E parameters and operational modes, (Boolean and analog write commands are ignored), program the ‘Use Modbus Port’ setting to ‘NO’. Monitor and Control Once a Modbus port is configured within the 505E’s Program Mode, the 505E will accept RUN mode commands from an external network master device (DCS, etc.). This allows a Modbus compatible device to monitor and perform all 505E RUN mode parameters and commands except for the Overspeed Test enable, On-Line/Off-Line Dynamics select, and Override Failed Speed Signal commands.
Both Modbus ports are independent of each other, and can be used simultaneously. The last command given between the two ports has priority or is the mode or function selected. To use a 505E Modbus port to monitor and operate the 505E, program the ‘Use Modbus Port’ setting to ‘YES’ for the desired port(s). Modbus Communication The 505E control supports two Modbus transmission modes. A mode defines the individual units of information within a message and the numbering system used to transmit the data. Only one mode per Modbus network is allowed. The supported modes are ASCII (American Standard Code for Information Interchange), and RTU (Remote Terminal Unit). These modes are defined in the following table.

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