/// <summary>
/// Attempts to set the PLC network configuration
/// </summary>
/// <param name="newConfig"></param>
/// <param name="attempts"></param>
/// <returns></returns>
private plcNetworkConfig setPLCNetworkRecursively(plcNetworkConfig newConfig, int attempts = 0)
{
int maxAttempts = 10;
if (attempts >= maxAttempts)
{
throw new Exception("Could not set new plc network config. Exceeded Max Write Attempts");
}
string newIP = $"{newConfig.newIP1}.{newConfig.newIP2}.{newConfig.newIP3}.{newConfig.newIP4}";
Console.WriteLine($"Attempt number {attempts} at setting the PLC to {newIP}");
// create a new service with a connection to the PLC
var service = new SmartDASService();
service.Connect();
plcNetworkConfig oldConfig = service.getPLCNetwork();
// Attempt to set the PLC network configuration
service.setPLCNetwork(newConfig);
// Disconnect the currently active connection with the PLC
service.Disconnect();
// Check that the current configuration is in the same network group as
// the old configuration. e.g. if the old config is 192.168.1.5 and the new config is 192.168.122.7
// then do not recursively check if it can access the plc, because the user has to enter the new
// ip address in their network configuration. if the old config is 192.168.1.5 and the new config
// is 192.168.1.124, then recursively validate the ip adddress on the plc is correct.
if (
oldConfig.newIP1 != newConfig.newIP1 ||
oldConfig.newIP2 != newConfig.newIP2 ||
oldConfig.newIP3 != newConfig.newIP3
)
{
return(newConfig);
}
// Set the service ip address to the new PLC ip address
service.IP = newIP;
// Check the configuration read back from the controller matches the new configuration attempting to be stored
// Attempt to reconnect to the PLC
int connectResult = service.Connect();
// Disconnect the currently active connection with the PLC
service.Disconnect();
// Check that the connection returned a non-zero error code
if (connectResult == 0)
{
return(newConfig);
}
else
{
// Try to set the PLC network again
return(this.setPLCNetworkRecursively(newConfig, attempts += 1));
}
}