Red Lion Logging and FIFO

I have a system set up with different states for a drive to run. I have all data logging at 60 seconds. I understand that between logs the data is buffered in the modular control. If say the drive changes from Normal Operation state to a Shutdown state between one of the 60 second logs, i want to dump all data in the buffer to file. I have tried using the Logsave function but appears to do nothing. The data logs are still showing data on a 60 second interval. I assumed when Logsave was called it would write to log and show a time stamp when the function was called and the buffer was dumped.

I have also tried to create, open and write to a file upon shutdown, but when i have tried this the system crashes, the CF light flashes rapidly and the CF view in windows explorer shows not responding and i have to do a DUMMY start to get control back.

If anyone can help with this or offer another solution i would be grateful .
Thanks
Nick

Try having a second Data-log, that is logging at 1s intervals, with maybe Logsave to snap-shot the most recent set of readings to your Shutdown Log.

I haven't tried this.
But it may be a way at least minimise the amount of lost data.

If your logging is set for 60 seconds that means we only take a snapshot of the data every 60 seconds. The buffer is 2 minutes so in your case each time we write to the CF card there will be two snapshots included in the update to the file on the CF card. The logsave() function will bypass the 2 minute buffer and log any data to the CF at the time you call the function.

If you want to see data in between the 60 second updates you will need to lower your update rate

Thanks
Jeremy

Hello Jeremy thanks for that. I dont think the logsave will do what i want but i have made the following code.

CreateFile("/logs/myfile.csv");

Testing.test = int(DriveConstant.PresetReference);
Testing.test2 = int(Sensor.Thermo);
Testing.test3 = int(Sensor.Volts);
Testing.test4 = int(Sensor.Thermo2);

cstring Ref;
cstring Thermo;
cstring Voltage;
cstring Calc;

Ref = IntToText(Testing.test, 10,3);
Thermo = IntToText(Testing.test2, 10,3);
Voltage = IntToText(Testing.test3, 10,3);
Calc = IntToText(Testing.test4, 10,3);

FileIndex = OpenFile("/logs/myfile.csv", 2);
WriteFileLine(FileIndex,"ShutDown Log at," + Timer.CurentTimeString() + "," + Timer.CurrentDateString()
+ "," + Ref + "," + Thermo + "," + Voltage + "," + Calc + ",");
CloseFile(FileIndex);

This is working fine except the data being read in from the tags are floats. As they need to be converted to integer before being converted to string i am losing data so for example the data from Sensor.Volts is writing to file as 2 when it should be 2.7. Any ideas how i can get this to work?

Nick517 said:

Hello Jeremy thanks for that. I dont think the logsave will do what i want but i have made the following code.

CreateFile("/logs/myfile.csv");

Testing.test = int(DriveConstant.PresetReference);
Testing.test2 = int(Sensor.Thermo);
//Testing.test3 = int(Sensor.Volts);
Testing.test4 = int(Sensor.Thermo2);

cstring Ref;
cstring Thermo;
cstring Voltage;
cstring Calc;

Ref = IntToText(Testing.test, 10,3);
Thermo = IntToText(Testing.test2, 10,3);

//DECTOTEXT(DATA, SIGNED, BEFORE, AFTER, LEADING, GROUP )

Voltage = DecToText(Sensor.Volts, 1, 5, 3, 0, 0);
Calc = IntToText(Testing.test4, 10,3);

FileIndex = OpenFile("/logs/myfile.csv", 2);
WriteFileLine(FileIndex,"ShutDown Log at," + Timer.CurentTimeString() + "," + Timer.CurrentDateString()
+ "," + Ref + "," + Thermo + "," + Voltage + "," + Calc + ",");
CloseFile(FileIndex);

This is working fine except the data being read in from the tags are floats. As they need to be converted to integer before being converted to string i am losing data so for example the data from Sensor.Volts is writing to file as 2 when it should be 2.7. Any ideas how i can get this to work?

Click to expand...

Try the above (changes colored)...If you like the way this works for your Voltage variable, do the same changes for the other floats.

Excellent, that is working perfect.
Thanks
Nick