6-1DP/DP CouplerA5E00244669-03

Diagnostics

Overview of contents

This chapter shows you the meaning of the LED displays on your DP/DP Coupler.The tables provide information on error states indicated by the LEDs, the possiblecauses and suggested corrective measures.

In the next section, you are made familiar with the diagnostic system of the DP/DP Coupler. An example is used to illustrate the evaluation of a diagnosticframe.

Section Topic Page

6.1 Diagnostics by means of LEDs 6-2

6.2 Diagnostics Using the User Program 6-4

6.3 Example of a diagnosis 6-11

6

Diagnostics

6-2DP/DP Coupler

A5E00244669-03

6.1 Diagnostics by means of LED indication

SF 1: Group error on PROFIBUS DP network 1 (red)SF 2: Group error on PROFIBUS DP network 2 (red)BF 1: Bus error on PROFIBUS DP network 1 (red)BF 2: Bus error on PROFIBUS DP network 1 (red)ON 1: 24 V power supply DP/DP Coupler network 1 (green)ON 2: 24 V power supply DP/DP Coupler network 2 (green)

BF 2

SF 1

ON 1

SF 2BF 1

ON 2

Figure 6-1 Status / error displays of the DP/DP Coupler

Table 6-1 Meaning of the LEDs ON 1 and ON 2

ON 1 ON 2 Meaning What to do

Off Off • Voltage not present at DP/DPCoupler,

• Applied supply voltage is notwithin permissible range.

• Hardware fault on the DP/DPCoupler

• Switch the power supplymodule on.

• Check the applied voltage.

• Replace the DP/DP Coupler.

On Off The DP/DP Coupler is suppliedwith power from network 1.

–

Off On The DP/DP Coupler is suppliedwith power from network 2.

–

On On The DP/DP Coupler is suppliedwith power from network 1 and 2.

–

Diagnostics

6-3DP/DP CouplerA5E00244669-03

Table 6-2 Status / error messages of the DP/DP Coupler

LEDs Meaning What to do

ON 1and/or ON

2

SF 1 SF 2 BF 1 BF 2

On On On On On All LEDs come on forapproximately 1 second. DP/DP Coupler in startup mode.

–

On On * * * Diagnostic message onPROFIBUS DP network 1

Analyze the diagnostic data.

On * On * * Diagnostic message onPROFIBUS DP network 2

Analyze the diagnostic data.

On * * On * No connection to DP master onPROFIBUS DP network 1.Possible causes:

• Bus communication to theDP/DP Coupler is down.

• The DP master is not inoperation.

• Verify the correct seatingof the bus connector.

• Check whether the buscable to the DP masterhas been interrupted.

• Switch the 24V DCswitch on the powers ppl mod le off and

On * * * On No connection to DP master onPROFIBUS DP network 2.Possible causes:

• Bus communication to theDP/DP Coupler is down.

• The DP master is not inoperation.

supply module off andthen on again.

On * * Fla-shes

* No data exchange between theDP master and DP/DP Coupleron PROFIBUS DP network 1.

• Check the configuration.

• Check the PROFIBUSaddress.

On * * * Fla-shes

No data exchange between theDP master and DP/DP Coupleron PROFIBUS DP network 2.

address.

Flashes Fla-shes

Fla-shes

Fla-shes

Fla-shes

Internal DP/DP Coupler error Get in touch with yourSiemens partner.

*: Not relevant