#Bootntr troubleshooting pcalc how to
#Bootntr troubleshooting pcalc full

#Bootntr troubleshooting pcalc full

Added full support for iOS 11, including drag and drop support, and even a (silly) bonus AR calculator mode in the About screen in the Help.â.If it is not main machine transformer taps or power being applied to primary may not be set properly. the power supply should always output 23 to 25 volts. If the 24VDC power or measurement reading is less then 20VDC then there is also most likely a problem with this circuit. The 120 volt circuit should not drop below 100 volts for any reason if it does there is a problem. Notes on voltage range to expect when testing PLC logic circuits. Use caution on mushing any buttons on PLC's. But you generally would have a complete shut down of PLC functions if this were the case. Some PLC's if they are for automation or external fixtures sometimes have a reset on them to clear and major alarms inside the PLC itself. Then sometimes another relay may be swapped out that was not being used on the board Many times you have to unsolder and resolder in the bad relays place

If its less then 40 ohms or so you most likely have a short to ground. Check with your meter and the power off to ground from the circuit that may be shorted. There are also sometimes fuses in the circuit as well that may need to be checked. Many times these relay boards will have a relay go bad or have a device such as a solenoid that shorts out to ground causing the relay contact to burn up. Make sure the relay switches when the PLC output is turned on. Make sure you check the voltage at the relay coil as well as the supply being but to the dry set of contacts on the relay. Many PLC outputs often go through a relay of some sort to change over to 120 volts. Verify with a meter the proper voltage is coming out of the PLC and verify the proper voltage is at the solenoid. If the outputs are being turned on by watching the diagnostics or LED's. Now check the output LED's or Y addresses to see if plc or control is outputting them. Otherwise test that power is coming back into the PLC inputs with a meter.Īt this point it may be necessary to actuate the machine either by an M-code if it is a CNC or if it is a PLC direct then run the functions you are trying to perform.ĭetermine possible solenoids or outputs that should be turning on for each condition and monitor when actuated. If these are all working correctly move on to checking the outputs below. Remember proxes typically fail to the on state so make sure they are not on when they are not supposed to be as well.Ĭheck the inputs on the machine or PLC diagnostics as you make and break them. But still be careful as some ladders are not written fully safe. Put the machine in ESTOP to avoid any unexpected movements.

Look through the electrical prints for the possible proxes or devices that may be faulty.Ĭheck each input LED goes on on the PLC or on the internal control diagnostics. Such as a tool changer, pallet changer or magazine area. Look for the area of the cell or sensors and switches located in the problem area. This is often used for hydraulic solenoid coils and such. Also check no primary fuses are blown.Ĭheck the 120VAC supply or transformer is outputting correct voltage and no fuses are blown. Also check that it is the correct voltage being applied.Ĭheck the 24VDC power supply that may be either provided internally from the PLC itself or by an external power supply. Identify where the PLC problem might be with certain Inputs or outputs etc.Ĭheck to ensure main PLC power is being applied (120vac or 24vdc) many times their is a main power LED on the PLC to indicate so.

#Bootntr troubleshooting pcalc how to

Learn how to troubleshoot and diagnose PLC's with this procedure and how to identify the PLC problem areas. Programmable Logic Controllers problems(PLC)