Steam Turbine Rotational Speed Monitor DF9011 Pro

Date:2021/1/21 10:25:13 Visits: Author:Dongfang YOYIK Engineering Co; Ltd,

China Steam Turbine Rotational Speed Monitor DF9011 Pro Manufacturer


The Rotational Speed Monitor DF9011 Pro made by YOYIK is a classic monitoring instrument for steam turbine. It is made of LED liquid crystal display, 64-bit high-pass CPU, 32-bit heat sink, 48-bit encryption optimization program and original anti-interference module, can be used for steam turbine from 300MW, 500MW capacity, to 660MW and 1000MW supercritical units. The setting of gear tooth number and prompted value is important to DF9011 Pro, affects the display and signal output. The instrument is matched to speed sensor DF6101-005-065-01-03-00-00.



Communication scheme of DF9011 Pro


1. Communication parameters

This communication packet is suitable for the case where DEH is Slave and DCS is Master, that is, data is transmitted only from DEH to DCS. Using Modbus RTU protocol, the specific communication parameter of DF9011 Pro is as below:

Baud rate: 9600bps

Data bits: 8 bits

Stop bits: 1 bits.

Check bits: None


2. Modbus transmission measuring points: 136 points in total. Modbus registers 40001~40128, transfer 128 points of analog quantity (a positive integer of 0~64000), registers 40129~40131, transfer 48 points of switching value; RS-232 communication protocol cable connection is adopted between DEH and DCS.



Steam Turbine Rotational Speed Monitor DF9011 Pro