Troubleshooting
Section 7-2
85
Start-up problems
Description
Possible cause
Possible remedy
No LEDs are ON or
Flashing
The PLC’s power is OFF
Turn the PLC’s power supply ON.
The Master Unit is faulty.
Replace the Master Unit.
The RUN LED is
Flashing
The same unit number has been set on
another Special I/O Unit, causing an I/O UNIT
OVER error in the PLC.
Make sure that the same unit number is not
used by more than one Special I/O Unit and
restart the PLC.
I/O table verification error. A Unit has been
removed or the Unit number setting has been
changed that caused an I/O SET ERR error in
the PLC.
Verify the I/O table and/or register the I/O
table again.
A Special I/O Unit or Interrupt Input Unit has
not been initialised, causing an CPU WAIT’G
error in the PLC.
Check and/or remove the faulty Unit.
The Master Unit is faulty
Replace the Master Unit.
The DP-ERR LED
is ON and the RUN
LED is Flashing
Wrong configuration data is present in the Unit.
The Unit waits for a configuration to be
downloaded.
Download a configuration.
The Master Unit is faulty.
Replace the Master Unit.
ERR LED is ON
A fatal error is detected. The cause is reported
in IR n+2.06 ~ IR n+2.08
Try to solve the cause and / or restart the
Unit. If this does not help, replace the Master
Unit
Configuration problems
Description
Possible cause
Possible remedy
Downloaded a
configuration, but
the DP-ERR LED is
flashing.
Configuration is incorrect. IR n+2.03 is ON.
Check IR n+3 to find out where / what the
possible problem is.
Check if the configuration corresponds to the
actual network configuration. Do the DP-
slaves have the same station addresses as in
the configuration? Are the correct GSD-files
being used?
If all is correct, try to download it again. If the
error remains, try to find out what is going on
with the configurator debugger.
DP-ERR LED is ON
and the READY
LED is flashing
Erroneous configuration data is present in the
Unit. The Unit waits for a configuration to be
downloaded
Download a configuration.
Configurator does
not download the
configuration.
Faulty RS-232C connection.
Check if the connection between the
computer and the Master Unit is correct.
Check if the cable is connected to the
configured COM-port.
COM-port driver not set up or wrong COM-port
configured.
Check if the driver is configured to the correct
COM-port.
Summary of Contents for C200HW-PRM21
Page 1: ...C200HW PRM21 PROFIBUS DP Master Unit OPERATION MANUAL Cat No W349 E2 2...
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Page 5: ...C200HW PRM21 PROFIBUS DP Master Unit Operation Manual Produced May 2000...
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Page 66: ...Debug mode Section 4 4 50...
Page 98: ...Messages Section 6 4 82...
Page 108: ...Maintenance Section 7 3 92...
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