Using Sketch to trigger watchdog in PLC IDE

Official Hardware Opta
1

Thought this might be useful to others. It appears that all of the mbed class functions do work while using the Sketch feature of the PLC IDE.

I found that when changing the modbus mater parameters like "TimeOut". The master state hangs and needs a reboot. I am not sure if there is a watchdog feature on the PLC IDE side, but the mbed functions seems to work.

To recreate this "feature" you start with a good mb master state:

image

then change the "TimeOut" parameter and download.

image

and the master hangs:

image

Using this sketch you need to create a "Shared Output" variable "nbClientOK" and copy the statues to it on the PLC IDE side:

nbClientOK := sysMbTcpMState.clientOK;

Sketch:

// Enable usage of EtherClass, to set static IP address and other
#include <PortentaEthernet.h>
arduino::EthernetClass eth(&m_netInterface);

#define WATCHDOG_TIME_MS 8000

void setup()
{

    mbed::Watchdog::get_instance().start(WATCHDOG_TIME_MS);
    
	// Configure static IP address
	IPAddress ip(192, 168, 1, 1);
	IPAddress dns(8, 8, 8, 8);
	IPAddress gateway(192, 168, 1, 1);
	IPAddress subnet(255, 255, 255, 0);
	// If cable is not connected this will block the start of PLC with about 60s of timeout!
	eth.begin(ip, dns, gateway, subnet);

}

void loop()
{
    if (PLCOut.nbClientOK)  {
        mbed::Watchdog::get_instance().kick();
    }
    else {
        
    }
    
}
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