Diagnostics
Diagnostic LEDs
DX LED
ST LED
DX Green LED Status
The PROFIBUS DP card has two LEDs, ST and DX, visible on the communication card.
•The status of the PROFIBUS DP card is indicated by the ST (status) red LED.
•The status of the PROFIBUS DP communication link is indicated by the DX (data exchange) green LED.
The table below gives the meaning of the various states of these two LEDs:
State | Meaning | Corrective actions in the event of malfunction |
| The card is in the "data exchange" state, |
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On | and |
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| No communication on the bus, | Check the connection to the PROFIBUS DP bus, start up the PLC. |
Off | no data is being exchanged. |
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ST Red LED Status
State | Meaning | Corrective actions in the event of malfunction |
| The card has been configured and its parameters |
|
Off | set correctly by the master. |
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| |
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| The card is in Idle state, waiting configuration from | Enter an address value between 2 and 125 using the switches on |
flashing 0.5 s | the master. | the option card. |
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| |
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| The card is waiting parameters or waiting | Check the connection to the PROFIBUS DP bus, |
| configuration. | start up the PLC and, if the drive has a communication card |
flashing 0.1 s |
| detected fault (CnF), reset it. |
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| The card is in (ILF) detected fault mode. | Check the connection between the PROFIBUS DP card and the |
On |
| drive. |
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| |
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LED states
LED state | Visual description of the LED state |
| The LED is OFF |
The LED is FLASHING
The LED is ON
18 | S1A10386 10/2009 |
