PLC LED controller specifications
Description
The PLC LED controller is part of the Auditory Sphere Lab and consist of a modular PLC from the Panasonic FP2 series. It controls the Red and Green LEDs in the setup. See here for LED specifications.
How does it work
The PLC LED controller is programmed with 'FPWINPRO 7' PLC programming tool of Panasonic. The program can be found here. The program starts automatically when the PLC is switched on. The program controls 256 relay outputs for switching 128 red and 128 green LEDs on or off. The intensities of the LEDs are controlled by Pulse Width Modulation (PWM).
From Matlab you can sent up to 16 LED configurations to the controller. With a trigger pulse you can let the LED controller know that it should present the next configuration. The LEDs are numbered 0 to 127 and there are red and green LEDs. With the test buttons on the door of the PLC cabinet you can switch on all red or green LEDs at once. A configuration specifies the ON or OFF state for all red and green LEDs with two arrays of 128 bits. The intensity of the red and green LEDs are not individually addressed, but set for all red or green LEDs at once with one number between 0 and 50.
How to use
You basically have to do two things:
- Specify the configurations (LED patterns) in matlab and sent it to the PLC.
- Specify triggers in your experiment code in matlab.
A Matlab example:
1: n = 8;
2: s = ledpattern(n);
3: for i=[1 3 5 7]
4: s(i).set([1 3 5],'r');
5: s(i).set([2 4 6],'g');
6: s(i).intensity('r', i);
7: s(i).intensity('g', i);
8: end
9: leds = ledcontroller('fp-web2.local');
10: leds.write(s);
- In line 1 the number of ledpatterns is specified.
- In line 2 a ledpattern array is created with n ledpatterns
- Between line 3 to 8 the odd numbered patterns are looped through.
- In line 4 to 7 a collection of red and green LEDs are set and intensities are assigned to the red and green LEDs.
- In line 9 a led controller object is created with the name of the Ethernet connection.
- In line 10 the ledpatterns are written to the ledcontroller.
After running this program the PLC controller can be triggered. Upon receiving a first trigger pulse the PLC will present the first ledpattern. The second trigger will display the second ledpattern, but since nothing is written to s(2) all LEDs will be off. The next trigger will display the next ledpattern etc.. The end result is that the LEDs will go on and off each time with a higher intensity.
You can find the Matlab code and examples here.
Specifications
- Panasonic PLC
- FPWINPRO 7 sofware
- Response time to trigger < 1.3 milli sec
- 2x128 output channels
- 5 pins Binder connectors for LEDs
- Test buttons for Red and Green LEDs
- BNC connector for input trigger
- Ethernet connector for communication
- The LEDs that are used in all the labs are Bivar 5BC-3-CA-F LED.
Technical desciption
| Component | Specification |
|---|---|
| PLC type | Panasonic FP2 series |
| PLC CPU | FP2C2LJ FP2SH CPU with COM port |
| PLC Ethernet unit | FPWEB2 FP Web-Server 2, 10/100MBit/s |
| PLC Output units | FP2Y64TJ FP2 64out transistor NPN (2x for Red and 2x for Green) |
| PLC Input unit | FP2X16D2J FP2 16in (12-24V) |
| PLC PWM unit | FP2PXYPJ FP2 multi I/O PNP |
| PLC Programming connection | RS232 serial interface (special cable) |
| PLC Programming tool | FPWIN PRO 7.0 |
| Current PLC program | PLC program FART2 v2.1 FPWIN Pro 7.pro Date 29-05-2018 |
| Location of program | Gitlab: biofysica\experiment\sphere Panasonic PLC |
| Number of channels | 128 |
| Configuration programming connection | Ethernet |
| Configuration programming tool | Matlab function: ledcontroller, ledpattern |
| Configuration buffer | 16 ledpatterns |
| PLC cycle speed | 1.35 ms |
| Led timing | Random delay between 1.35 ms and 2.70 ms after trigger 1 to 2 PLC cycles |
| Timing pulse | Trigger-echo within 40 microsec of LED response |
| Shortest On-Off interval | 5.4 ms (4 PLC cycles) in normal mode 1.35 ms (1 PLC cycle) in cycle time mode |
| Trigger input | 5V (triggers LED configurations) |
| Gate input | 5V (enables or disables all LED outputs) |
| Intensity regulation | PWM (Pulse Width Modulation) @30 kHz |
| Output voltage | 12V |
| LED type | Bivar 5BC-3-CA-F, common anode, PNP |
| LED light | Red 625nm 4mcd; Green 568nm 6mcd |
| LED load | 1 kOhm in series |
| LED Testing | Red test button (all 128 Red LEDs) Green test button (all 128 Green LEDs) |
| LED Connector type | Binder 719 series 5 poles (connects also the speakers) |
| Binder Connector pin assignment | 1 +5V 2 Red LED signal 3 Green LED signal 4 Speaker+ 5 Speaker- |
| Binder connector pin to wire color assignment | 1 Black 2 Red 3 Green 4 Yellow 5 Blue |
Panasonic FP2 series
| Component | Specificatie |
|---|---|
| FP2C2LJ FP2SH PLC | 1 ms cycle time when <20.000 steps per cycle (120.000 steps max) Measured cycle time 1.35 ms |
| FP2Y64TJ output unit (4x) | 64 channels 24V NPN output Current 0.3A max Response time <0.3 ms |
| FP2PXYPJ multi I/O unit | PNP transistor PWM output 30 kHz Duty cycle 0-100% in steps of 1% Max output 800 mA |
| FP2X16D2J input unit | 16 channels Current 8 mA @24V Response time <0.2 ms |