PID BOARD Type 5120

Application and measurement concept

The PID BOARD was developed by hps SystemTechnik specifically for introductory and advanced experiments in control engineering. It can also be used as a controller together with the POWER BOARD Type 5125, the MOTOR BOARD Type 5130, the Temperature and Brightness Controlled System Type 5125.5 and the SERVO BOARD Type 5131.

With only a few exceptions, all control-loop elements with time-dependent behaviour are designed so that their step response can be measured using a standard oscilloscope, a storage oscilloscope or a Y-t recorder. For oscilloscope operation, repetition frequencies of up to about 100 Hz are possible; recorder measurements can be carried out as single events in the seconds range.

Measurement reproducibility and operating comfort are defined by the sequence control specially developed by hps SystemTechnik. Before each cycle, the relevant capacitors are discharged, a pre-trigger circuit ensures complete signal display, and an additional RESET input allows the sequence control to be driven by a computer or PLC.

Functional blocks and adjustment ranges

For each controller, the characteristic values can be adjusted over a wide range using plugs and potentiometers. Signal polarity can be adapted to the overall circuit or the trainer's requirements by different summing, comparison and inversion blocks.

Limit detectors at the controller outputs indicate range violations by LEDs. For the electronic simulation of controlled systems, the board provides an I element, several delay elements and proportional elements.

• Setpoint generator: 0 ... +10 V, 0 ... -10 V and 0 ... +5 V
• Setpoint integrator with continuously adjustable time constant
• Sequence control: 0 ... +10 V, approx. 0 ... 100 Hz, single-shot operation selectable
• Relay with 2 changeover contacts for setpoint, load steps and recorder control
• Comparator 1 and 2 for forming the control deviation e = w - x
• P, I, D and PI controllers, summator, two-step controller and limiter
• 1st-order delay element, 3rd-order delay element and I element

Setup, transport and accessories

For experiments, the PID BOARD can be placed on a desk or mounted in a table rack for demonstration. It can also be screwed into a box for safe transport and storage, while all experiments can still be carried out directly inside the box.

Recommended accessories are the experiment manual “Introduction to Control Engineering” Type V 0120 and the accessory set Type 5120.1 consisting of connecting leads and plugs.