The IMFCS01 Frequency Counter module provides a single channel frequency input to a Harmony controller. The controller utilizes function code 145 (frequency counter) to configure and access the module input channel. The IMFCS01 module conditions, converts, and processes pulse inputs from a magnetic pickup attached to the front standard of a steam or gas turbine. The converted digital data represents a count of the input pulses and the period of the count. The controller uses the data to calculate frequency and consequently turbine speed. The calculated speed can then be used to drive servo
valve outputs for turbine speed control. The IMFCS01 module provides exceptional frequency counting accuracy required by steam or gas turbine control systems. The IMFCS01 module is an intelligent I/O module with an onboard microprocessor, memory, and communication circuitry. In most applications, the IMFCS01 module works with the IMHSS03 Hydraulic Servo module.