TROUBLESHOOTING

Scan Light

Scan Light is off –

  1. Ensure power is properly connected to your controller (View wiring diagrams for your specific controller)
  2. Ensure that Eprom is seated well in its socket
  3. Check for user program on Eprom and make sure it is compiled correctly (Ensure Eprom is programmed properly)
  4. Check for operating system on Eprom (Make sure operating system and user program is on the Eprom)

Scan Light is on Steady-

  1. Check all inputs to see if functioning, if so is it a new program or old ? If it is a new program problem is usually with the program development (Try opening your program, recompile it and reburn the Eprom or download it to the PLC). In either case see if outputs are functioning in accordance to your ladder logic program. Also see if it is just one output or all outputs are not working.

Scan light is flashing (Consistant 2Hz) –

  1. Unit does not have a valid program (Recheck the program and make sure it is setup for your specific controller)
  2. Check that the software version number corresponds to the operating system version number (Operating system version number is located on a sticker on the Eprom)
  3. Check to see if the unit is in stop mode (Dos software, goto the monitor function and see if you can start the PLC, In the windows software goto download in the tools menu and see if you can start the PLC)

Scan light is flashing (Short breaks between flashes 2Hz) –

  1. Program may be corrupt (Re-download to PLC or burn another Eprom)
  2. If using coils or solenoids, Put some noise suppressors on the outputs to guard the system from noise spikes
  3. Make sure system is properly grounded

If your problem is still not solved click here to contact Entertron

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Digital Inputs

If input LED’s do not come on –

  1. Check inputs for proper wiring acording to board configuration, Either PNP or NPN input wiring most of our controllers are NPN or click here for our wiring diagrams
  2. Make sure input voltages are correct, and that there is at least 15mA of current to drive the input
  3. If the wiring is correct and one or more LED’s come on but others do not, Send the board back to Entertron for repairs

If input LED’s do come on –

  1. If all LED’s do come on but inputs are not registering in ladder logic program to control the outputs on the board, Check to see if the inputs are registering in one of our monitor utilities, also Check to make sure your user file is downloaded to the PLC or it is burned into the Eprom
  2. If your Ladder Logic is downloaded or burned into the Eprom, then check to make sure that it was written and compiled in the correct software version that matches the operating system in your Eprom
  3. If the input is off but the LED is still on or glowing somewhat, there is a hardware problem and the board needs to be sent back to Entertron for repairs
  4. If you still cannot get the inputs to register in the Ladder Logic check for scan light problems

If your problem is still not solved click here to contact Entertron

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Digital Outputs

If output LED comes on –

  1. Check to see if outputs are wired correctly (Consult wiring diagrams)
  2. If relay outputs , listen for relay to click closed and check continuity. If it is a solid state output board do the same activate that output and check the continuity across its contacts

If output LED does not come on –

  1. Check to see that ladder logic diagram was written and compiled correctly for your operating system and controller, and it was downloaded to the controller or burned into the Eprom with no errors or problems
  2. Check the scan light for any type of flashing if it is flashing at all check scan light troubleshooting

If your problem is still not solved click here to contact Entertron

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Analog Inputs

Analog Input #1 – Register 23, Relay 147
Analog Input #2 – Register 21, Relay 145
Analog Input #3 – Register 19, Relay 143
Analog Input #4 – Register 17, Relay 141
Analog Input #5 – Register 16, Relay 133
Analog Input #6 – Register 15, Relay 132
Analog Input #7 – Register 14, Relay 131
Analog Input #8 – Register 13, Relay 130

  1. Make sure the associated relays are turned on and registers are being used for the specific analog input see chart above.
  2. If the input register is reading zero (Check the voltage at the analog terminals, Make sure voltage is grounded to the board)
  3. Make sure there is a signal on that specific analog channel (if a signal is being put in that is within range but the register is showing the max register value 65535 not the max analog value 256 for 8bit or 4095 for 12bit) if this is the case please contact Entertron for repair
  4. Value in register is slowly floating up (Check the voltage at the input terminals, make sure that input ground is connected to the board)
  5. Input voltage does not correspond to the value in the register (Input may need to be calibrated, Please contact entertron)

If your problem is still not solved click here to contact Entertron

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Analog Outputs

Analog Output #1 – Register 24, Relay 148
Analog Output #2 – Register 22, Relay 146
Analog Output #3 – Register 20, Relay 144
Analog Output #4 – Register 18, Relay 142

  1. Make sure the associated relays are turned on and the register is being used for the specific analog output
  2. Preset that outputs register with max analog value (256 for 8bit or 4095 for 12bit) and then put a voltmeter across the output, you should get the max for the output

If your problem is still not solved click here to contact Entertron

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Communication

  1. Check baud rate (9600), parity (NONE), data bits (8).
  2. Make sure user is in the right port. If user has two serial ports make sure he is in port one on PLC
  3. Check RXD, TXD, COM to make sure serial connections are hooked up right ( View Serial Port Pinouts )
  4. User in correct com port (Com1 or Com2)
  5. Check scan light if flashing, bad Eprom, can cause no communication (See Scan Light)
  6. Check for noise, Make sure serial cable is not running near any 115VAC power lines or any coils or solenoids
  7. Check that all power management is turned off, Both in CMOS and all refrences to power.exe in autoexec.bat
  8. Make sure mouse driver is not associated with that port
  9. Check using a voltmeter the voltage between Com and Recieve and Com and Transmit on the PLCs serial port, nominal voltages should be between -8 and -12 v across each line.

If your problem is still not solved click here to contact Entertron

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Serial Port Connections


Unit can be connected to serial port 1 or 2. Be sure to have the correct port selected on the monitor utility. Also be sure that the Baud Rate is set correctly. All Entertron controllers with Version 3.30 Software or higher communicate at 9600 Baud.

Entertron PLC – To – IBM Computer 9 Pin
TXD ———————–Pin#2 (PC Recieve)
RXD———————–Pin #3 (PC Transmit)
GND———————–Pin #5

It may also be necessary to jumper together the handshaking lines to communicate with the PLC. Pins 4,6,& 9 together and jumper pins 1,7, & 8 together if you are having problems getting your computer to communicate.

Entertron PLC – To – IBM Computer 25 Pin
TXD ———————–Pin#3 (PC Recieve)
RXD———————–Pin #2 (PC Transmit)
GND———————–Pin #7

It may also be necessary to jumper together the handshaking lines to communicate with the PLC. Pins 4,5,& 8 together and jumper pins 6,20, & 22 together if you are having problems getting your computer to communicate.

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Contact Information

Please have the following information when contacting Entertron with a technical support problem.

  1. Model of the controller (Ex. Smart Pak Plus, SK1600-R2, SK1800, Elite 2000)
  2. Serial number of the controller (located on the corner of the board written in permanent marker)
  3. Part number (located on a sticker on the Microprocessor)
  4. What version operating system you are using (Located on a sticker that is on the EPROM, Ex. Standard, Enhanced, Ver 3.43, Ver 4.43, Ver 3.09, etc……)
  5. What version software you are using (In the Dos software this can be found on the opening screen, In the windows software it can be found under about in the help menu)

Once you have gathered the information above you can contact Entertron in three ways

E-Mail us at plcs@entertron.com

Fax us at (716)201-1203

Phone us at (716)772-7216

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