By using the dedicated functions, you can create applications that handle PLC devices, such as accessing the C language controller, I / O module, intelligent function module, network module, sequencer CPU, and motion CPU. There are four types of functions: "CCPU / CITL function", "QBF function", "ISR (Interrupt Service Routine) QBF function", and "MD function".
→ Dedicated library function

Processing can be distributed to the PLC CPU

RD55-V

Data processing and numerical analysis processing, which are difficult to achieve with ladder programs, can be realized with the C language intelligent function module. For example, the PLC CPU can control the module, and the C language intelligent function module can perform advanced arithmetic processing and distributed processing. Not only can the load on the PLC CPU be reduced, but also high-speed processing can be achieved.
→ Distributed processing with PLC CPU

Collect specified device data in real time

RD55-V

The device data specified in advance can be transferred to the C language intelligent function module during the END processing of each sequence scan of the programmable controller CPU. The data stored in the temporary storage area can be acquired by the dedicated function of the C language intelligent function module and transferred to the user reserved memory. The data can be saved to an SD memory card or transferred to a host server at any time.
→ Every sequence scan data collection

Analysis processing by data analysis function and statistical analysis function is possible

R12-V

RD55-V

A lineup of functions that enables data analysis, such as FFT calculation * 1 used in vibration analysis, etc., and statistical analysis, such as the MT method, used in preventive maintenance of equipment, etc., to be realized in the controller. The C language intelligent function module also provides FBs that can use these functions from a sequencer.
→ Data analysis library

Function list ^{* 2}

Data analysis functions	Function support	FB compatible
Digital filter operation	●	●
Envelope calculation	●	●
FFT analysis	●	●
Waveform intersection calculation	●	–
Waveform peak (maximum, minimum) calculation	●	–
Calculation of waveform effective value (root mean square)	●	–
Upper / lower limit judgment	●	–
Upper / lower limit waveform judgment	●	–

Statistical analysis functions	Function support	FB compatible
Least squares calculation	●	●
Moving average calculation	●	–
Standard deviation calculation	●	–
Variance calculation	●	–
MT method Unit space generation	●	●
MT method Mahalanobis distance calculation	●	●
Multiple regression analysis	●	●

Processing by FFT operation

* 1 Fast Fourier Transform: A process that rapidly transforms time-axis data into frequency-axis data to calculate how many frequency components are included in the collected data

* 2 For details on functions, refer to the MELSEC iQ-R C Controller / C Intelligent Function Module Programming Manual (Data Analysis) (SH-081755).