Omron SYSMAC CJ1W-PRM21, Руководство по эксплуатации

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Troubleshooting I/O Communication
Section 7-3
PROFIBUS-DP Master Unit
is configured. Some, but
not all slaves exchange
data. Network cabling is not correct.
• BF LED indicator is ON or Flashing.
• Master Status 2 error flag may provide
more information (CIO Word n+6, bit 00 ~
03, see Note).
• CIO Words n+9 to n+16 show which slaves
have problems.
Verify that the network installation is correct:
• Verify that all slaves are powered up and
functioning correctly.
• Verify that all slave stations are correctly
connected to the network.
• Verify that any repeaters used are function-
ing correctly.
• Check the cable length versus the selected
baud rate.
• Verify that any stubs used are not too long.
• Verify that termination (resistors and induc-
tors) are properly set and used.
Configuration is not correct.
• BF LED indicator is Flashing.
• CIO Words n+9 to n+16 show which slaves
have problems.
• Use CX-Profibus and DTMs to determine
slave diagnostics.
Verify that the configuration is correct:
• Verify that address of targeted slave device
matches the configured address.
• Verify that the slave parameter and configu-
ration settings are correct.
• Verify that the watchdog setting for the
slave station is not too low.
The configuration contains timing errors.
• BF LED indicator is Flashing.
• Slaves are sometimes briefly in and out of
data exchange.
• Verify that the Bus parameter sets are cor-
rect. If necessary, increase Target Rotation
Time and/or Min. Slave Interval parame-
ters.
• Re-download the configuration.
• If the problem persists, replace the Unit.
A second Master (with its own slave stations)
is on the same network, interfering with this
Master Unit.
• The baud rate settings of both Masters is
different.
• The total Target Rotation Time set to both
masters is too small (i.e. not the sum of
both individual time values).
• Verify that all Masters on the network are
set to the same baud rate.
• Verify that the total Target Rotation Time for
all Masters on the network is set to the sum
of all individual Masters.
Specific slave stations are configured and
allocated to the Master Unit, but the slave
which is not exchanging data may have been
disabled using the FINS STOP command. Use the FINS RUN command to enable the
slave stations.
PROFIBUS-DP Master Unit
is configured. All slaves
were in data exchange, but
it has now stopped. No power is supplied to the system. All LED
indicators on the system are OFF. • Verify that power is supplied to the system.
A PLC CPU error occurred.
• The ERH indicator is ON, the other LED
indicators are OFF.
• The ERR/ALM LED indicator on the PLC
CPU is ON.
• Determine error in the PLC CPU (Refer to
the
CS1 Series CPU Unit Operation Man-
ual (W339) or the CJ Series CPU Unit
Operation Manual (W393)).
A Unit error occurred.
• The ERC indicator is ON, the other LED
indicators are OFF.
• The ERR/ALM LED indicator on the PLC
CPU is ON.
• Restart the Unit, and read the error log to
determine the type of error.
The PROFIBUS-DP Master Unit is in either
OFFLINE or STOP mode.
• The BST LED indicator is OFF
• The BF LED indicator is ON: A PROFIBUS
interface error has occurred: see Master
Status 2 error flags (CIO Word n+6, bit 00 ~
03, see Note) for details.
Determine the mode of the Unit: Check the
Master Status 1 Word (CIO Word n+5, bit 00
to bit 03, see Note). If Unit is in OFFLINE or
STOP mode:
• Verify that the Master does not use the
same address as another Master Unit on
the network. Otherwise, correct the Master
Unit’s PROFIBUS address.
• Set CLEAR or OPERATE switch in CIO
Word n (see Note).
Network cabling is not correct.
• BF LED indicator is ON.
• Master Status 2 error flag may provide
more information (CIO Word n+6, bit 00 ~
03, see Note).
Verify that the network installation is correct:
• Verify that the network is still in tact, and
connected to the Unit.
• Verify that any repeaters used are function-
ing correctly.
Problem Probable cause Correction