How to solve the problem of FM pulse signal output

2022-08-08
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How to solve the level matching between the output level of FM pulse signal of frequency converter and the high-speed counter module of PLC

Abstract:

is specially used to solve the level matching between the output level of pulse signal and the high-speed counter module of PLC produced by our company, which puts "quality and service" in the first place. At the same time, it can overcome the interference of strong current of electric execution system on industrial control site to PLC control system

40 ~ 77hrd key words: full digital closed-loop control

with the continuous improvement of digital technology, especially in the automatic control system, digital signal processing compared with traditional analog signal processing, both the real-time, adjustment accuracy, flexibility, reliability and other aspects of remote control reflect the growing advantages of digital technology. Therefore, for example, the early variable-frequency speed controller output from a single V or mA analog signal feedback, mhm-frdv optical isolation pulse conversion shaper is specially used to solve the level matching between the output level of the FM pulse signal of the variable-frequency governor and the high-speed counter module of the PLC, and at the same time, it can overcome the interference of the strong current of the electric execution system on the industrial control site to the PLC control system. For example, Mitsubishi frequency converter FR-A500 has turned to the dual remote signal output mode of analog AM and digital FM for selection. Now PLC and DCS, such as system closed-loop control, choose the full digital closed-loop mode is the development trend. It has been widely used in the new generation of continuous caster system in the iron and steel industry. Such as Shanghai heavy metals Continuous Casting Technology Engineering Co., Ltd., liaogang Design Institute, etc

b. it adopts sheet module in structure, so as to improve the efficiency of tire product development and the accuracy of new products. The bayonet structure can be directly clamped into the standard DIN rail for installation, which is convenient for installation, disassembly and maintenance. It can save and replace the input and output terminals of the control cabinet

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