TROUBLESHOOTING
Troubleshooting
is broken up into these seven catagories:
Problems with the
scan light
Problems concerning
digital inputs
Problems concerning
digital outputs
Problems concerning
analog inputs
Problems concerning
analog outputs
Problems
communicating to the PLC
If your problem is
not listed above please contact Entertron
Scan Light
Scan
Light is off -
- Ensure
power is properly connected to your
controller (View wiring diagrams for your
specific controller)
- Ensure
that Eprom is seated well in its socket
- Check
for user program on Eprom and make sure
it is compiled correctly (Ensure Eprom is
programmed properly)
- Check
for operating system on Eprom (Make sure
operating system and user program is on
the Eprom)
Scan
Light is on Steady-
- 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) -
- Unit
does not have a valid program (Recheck
the program and make sure it is setup for
your specific controller)
- 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)
- 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) -
- Program
may be corrupt (Re-download to PLC or
burn another Eprom)
- If
using coils or solenoids, Put some noise
suppressors on the outputs to guard the
system from noise spikes
- Make
sure system is properly grounded
If your problem is still not
solved click here to contact Entertron
___________________________________________________________________________
Digital Inputs
If
input LED's do not come on -
- 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
- Make
sure input voltages are correct, and that
there is at least 15mA of current to
drive the input
- 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 -
- 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
- 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
- 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
- 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
___________________________________________________________________________
Digital Outputs
If
output LED comes on -
- Check
to see if outputs are wired correctly
(Consult wiring
diagrams)
- 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 -
- 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
- 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
___________________________________________________________________________
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
- Make
sure the associated relays are turned on
and registers are being used for the
specific analog input see chart above.
- If
the input register is reading zero (Check
the voltage at the analog terminals, Make
sure voltage is grounded to the board)
- 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
- Value
in register is slowly floating up (Check
the voltage at the input terminals, make
sure that input ground is connected to
the board)
- 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
___________________________________________________________________________
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
- Make
sure the associated relays are turned on
and the register is being used for the
specific analog output
- 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
___________________________________________________________________________
Communication
- Check
baud rate (9600), parity (NONE), data bits
(8).
- Make
sure user is in the right port. If user
has two serial ports make sure he is in
port one on PLC
- Check
RXD, TXD, COM to make sure serial
connections are hooked up right ( View Serial
Port Pinouts )
- User
in correct com port (Com1 or Com2)
- Check
scan light if flashing, bad Eprom, can
cause no communication (See Scan Light)
- Check
for noise, Make sure serial cable is not
running near any 115VAC power lines or
any coils or solenoids
- Check
that all power management is turned off,
Both in CMOS and all refrences to
power.exe in autoexec.bat
- Make
sure mouse driver is not associated with
that port
- 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
___________________________________________________________________________
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.
___________________________________________________________________________
Contact Information
Please
have the following information when contacting
Entertron with a technical support problem.
- Model
of the controller (Ex. Smart Pak Plus,
SK1600-R2, SK1800, Elite 2000)
- Serial
number of the controller (located on the
corner of the board written in permanent
marker)
- Part
number (located on a sticker on the
Microprocessor)
- 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......)
- 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 |
