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Troubleshooting Using Error Status
Section 7-4
01 PROFIBUS protocol error An error has occurred in the PROFIBUS interface, with distorted messages
received by the PROFIBUS-DP Master Unit.
Most likely causes:
• Lost token messages (the token is not returned),
• An active station detected beyond the Highest Station Address setting (HSA).
To correct this:
• Check the Master stations on the network, and make sure they are all working
correctly.
• Check the HSA setting in CX-Profibus, and make sure it is set to the Master sta-
tion with the highest address on the network.
• After correction, switch the Unit to CLEAR / OPERATE mode again.
02 Double Master address
error
A second Master Unit with the same network address has been detected on the
PROFIBUS network. The PROFIBUS-DP Master Unit has switched to OFFLINE.
To correct this:
• Check the Master Stations on the network and ensure that they have unique sta-
tion addresses.
• After correction, switch the Unit to CLEAR / OPERATE mode again.
03 Hardware error A hardware error has occurred in the PROFIBUS interface of the Unit. The PROFI-
BUS-DP Master Unit has switched to OFFLINE.
Most likely causes:
• Faulty wiring,
• Broken messages,
• Short-circuits, or
• Faulty bus timings.
• A Master station beyond the Highest Station Address has been detected.
To correct this:
• Check the network wiring, and make sure it is correct.
• Check for short-circuits.
• Check the bus timing set through CX-Profibus.
• Check if any other faulty devices are on the same network.
• After correction, switch the Unit to CLEAR / OPERATE mode again.
12 Mode command error An error has occurred when setting two or more mode switches in Switch Word
(CIO Word n). The flag will be set to ON, until the correct command, i.e. one mode
switch has been issued.
13 Parameter error An error has occurred initializing the PROFIBUS interface, after reading the param-
eter sets from the non-volatile memory to the volatile memory.
Most likely cause: A faulty parameters has been downloaded to the Unit.
To correct this: Check the parameter settings in CX-Profibus and correct them if
necessary. After correction, perform a download of the new parameters to the Unit.
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