To verify that the outputs of your Raspberry PLC are working correctly, the recommended approach is to run a C++ test program that toggles all digital, analogue, and relay outputs every second. If the corresponding LEDs turn on and off, the outputs are working. If they do not respond, the problem is in the software configuration or the hardware itself.
Installing the rpiplc-lib library
The test program depends on the rpiplc-lib. Follow these steps to install it:
- Instala git si no está presente:
sudo apt update && sudo apt install git - Clona el repositorio en un directorio de tu elección:
git clone https://github.com/Industrial-Shields/rpiplc-lib.git - Entra en el directorio y compila:
cd rpiplc-lib && make - Instala en el sistema:
sudo make install
La librería instala sus cabeceras en /usr/local/include/rpiplc y la librería compilada en /usr/local/lib.
Output test program
Guarda el siguiente código en un archivo llamado test_outputs.cpp. El programa usa condicionales de preprocesador para activar los pines de salida correctos según el modelo de Raspberry PLC.
#include <rpiplc.h>
void setDigitalPins(int state) {
digitalWrite(PWM3, state);
digitalWrite(PWM2, state);
digitalWrite(PWM1, state);
#if defined(RPIPLC_21) || defined(RPIPLC_38AR) || defined(RPIPLC_42) || defined(RPIPLC_53ARR) || defined(RPIPLC_54ARA) || defined(RPIPLC_57AAR) || defined(RPIPLC_58)
digitalWrite(Q0_0, state); digitalWrite(Q0_1, state); digitalWrite(Q0_2, state);
digitalWrite(Q0_3, state); digitalWrite(Q0_4, state); digitalWrite(Q0_5, state);
digitalWrite(Q0_6, state); digitalWrite(Q0_7, state);
#elif defined(RPIPLC_19R) || defined(RPIPLC_38R) || defined(RPIPLC_50RRA) || defined(RPIPLC_57R)
digitalWrite(Q0_0, state); digitalWrite(Q0_1, state); digitalWrite(Q0_2, state);
digitalWrite(R0_1, state); digitalWrite(R0_2, state); digitalWrite(R0_3, state);
digitalWrite(R0_4, state); digitalWrite(R0_5, state); digitalWrite(R0_6, state);
digitalWrite(R0_7, state); digitalWrite(R0_8, state);
#endif
#if defined(RPIPLC_42) || defined(RPIPLC_57AAR) || defined(RPIPLC_58)
digitalWrite(Q1_0, state); digitalWrite(Q1_1, state); digitalWrite(Q1_2, state);
digitalWrite(Q1_3, state); digitalWrite(Q1_4, state); digitalWrite(Q1_5, state);
digitalWrite(Q1_6, state); digitalWrite(Q1_7, state);
#elif defined(RPIPLC_38R) || defined(RPIPLC_38AR) || defined(RPIPLC_50RRA) || defined(RPIPLC_53ARR) || defined(RPIPLC_54ARA) || defined(RPIPLC_57R)
digitalWrite(Q1_0, state); digitalWrite(Q1_1, state); digitalWrite(Q1_2, state);
digitalWrite(R1_1, state); digitalWrite(R1_2, state); digitalWrite(R1_3, state);
digitalWrite(R1_4, state); digitalWrite(R1_5, state); digitalWrite(R1_6, state);
digitalWrite(R1_7, state); digitalWrite(R1_8, state);
#endif
#if defined(RPIPLC_50RRA) || defined(RPIPLC_54ARA) || defined(RPIPLC_58)
digitalWrite(Q2_0, state); digitalWrite(Q2_1, state); digitalWrite(Q2_2, state);
digitalWrite(Q2_3, state); digitalWrite(Q2_4, state); digitalWrite(Q2_5, state);
digitalWrite(Q2_6, state); digitalWrite(Q2_7, state);
#elif defined(RPIPLC_53ARR) || defined(RPIPLC_57AAR) || defined(RPIPLC_57R)
digitalWrite(Q2_0, state); digitalWrite(Q2_1, state); digitalWrite(Q2_2, state);
digitalWrite(R2_1, state); digitalWrite(R2_2, state); digitalWrite(R2_3, state);
digitalWrite(R2_4, state); digitalWrite(R2_5, state); digitalWrite(R2_6, state);
digitalWrite(R2_7, state); digitalWrite(R2_8, state);
#endif
}
void setAnalogPins(int value) {
#if defined(RPIPLC_21) || defined(RPIPLC_38AR) || defined(RPIPLC_42) || defined(RPIPLC_53ARR) || defined(RPIPLC_54ARA) || defined(RPIPLC_57AAR) || defined(RPIPLC_58)
analogWrite(A0_5, value); analogWrite(A0_6, value); analogWrite(A0_7, value);
#elif defined(RPIPLC_19R) || defined(RPIPLC_38R) || defined(RPIPLC_50RRA) || defined(RPIPLC_57R)
analogWrite(A0_0, value); analogWrite(A0_1, value); analogWrite(A0_2, value);
#endif
#if defined(RPIPLC_42) || defined(RPIPLC_57AAR) || defined(RPIPLC_58)
analogWrite(A1_5, value); analogWrite(A1_6, value); analogWrite(A1_7, value);
#elif defined(RPIPLC_38R) || defined(RPIPLC_38AR) || defined(RPIPLC_50RRA) || defined(RPIPLC_53ARR) || defined(RPIPLC_54ARA) || defined(RPIPLC_57R)
analogWrite(A1_0, value); analogWrite(A1_1, value); analogWrite(A1_2, value);
#endif
#if defined(RPIPLC_50RRA) || defined(RPIPLC_54ARA) || defined(RPIPLC_58)
analogWrite(A2_5, value); analogWrite(A2_6, value); analogWrite(A2_7, value);
#elif defined(RPIPLC_53ARR) || defined(RPIPLC_57AAR) || defined(RPIPLC_57R)
analogWrite(A2_0, value); analogWrite(A2_1, value); analogWrite(A2_2, value);
#endif
}
int main() {
initPins();
while (true) {
setDigitalPins(1);
setAnalogPins(2000);
delay(1000);
setDigitalPins(0);
setAnalogPins(0);
delay(1000);
}
}Compiling and running the test
Compila el programa con el siguiente comando, sustituyendo RPIPLC_XX por el modelo que corresponda a tu unidad (por ejemplo RPIPLC_58):
g++ -o test_outputs test_outputs.cpp -L /usr/local/lib -l rpiplc -I /usr/local/include/rpiplc -D RPIPLC_XX
Los defines de modelo disponibles son: RPIPLC_19R, RPIPLC_21, RPIPLC_38AR, RPIPLC_38R, RPIPLC_42, RPIPLC_50RRA, RPIPLC_53ARR, RPIPLC_54ARA, RPIPLC_57AAR, RPIPLC_57R, RPIPLC_58.
Run the compiled binary as root:
sudo ./test_outputs
The program toggles all outputs every second. Watch the LED panel on the PLC. If any LED does not respond, check the wiring and library installation.
How to check the Raspberry PLC outputs