Future Design Controls, PC201-2-0-0-0, Process Control Card, Pulsed Voltage to Drive SSR, 5V/30mA
Features:
- PID Controller, Ramp and Dwell Controller and Recorder 3 in one Device
- Plug and Play I/O Options
- 18-bit Universal input A-D for PID Control
- 15-bit output D-A
- Fuzzy + PID microprocessor-based control
- Fast input sampling rate 200msec for PID Control
- Two level of function complexity
- 50 Profiles,1000 Segments in Total
- Differential control
- Auto-tuning and Self Tuning function
- Sleep mode function
- "Soft-start" Ramp and Dwell timer
- Universal inputs (Thermocouple, RTD, mA, VDC)
- Analog input for remote set point and CT
- Event input for changing function and set point
- Programmable digital filter
- Hardware lockout + remote lockout protection
- Loop break alarm
- Heater break alarm
- Sensor break alarm + Bumpless transfer
- Pump control
- 100msec Sampling rate and log speed for Data Acquisition
- Real time and Historical Trends for PV and SV
The Process Control Card uses Fuzzy Logic plus PID microprocessor technology for its control. The Fuzzy Logic plus PID microprocessor based technology enables a process to reach a predetermined set point in the shortest time, with the minimum of overshoot during power-up or external load disturbance. The module can be easily plugging into the rear side IO slots of the paperless recorder. Various control and input parameters can be configured easily by using the touch screen menus and navigation.
This Process Control Card can be configured by using the Configuration Menu on the device or by using the PC Based Configuration Software. Even though PID control has been used and proved to be an efficient controlling method by many industries for more than a decade, yet the PID is difficult to deal with some sophisticated systems such as second and higher order systems, long time-lag systems, during set point change and/or load disturbance circumstance etc. The PID principle is based on a mathematic modeling which is obtained by tuning the process. Unfortunately many systems are too complex to describe in numerical terms precisely. In addition to these, systems may be variable from time to time. In order to overcome the imperfection of PID control, the Fuzzy Technology is introduced.
What is the Fuzzy Control? It works like a good driver. Under different speeds and circumstances, he can control a car well with experiences he had before and does not require the knowledge of kinetic theory of motion. The Fuzzy Logic is a linguistic control which is different from the numerical PID control. It controls the system by experiences and does not need to simulate the system precisely as been controlled by PID.
