PROFIBUS Manual

Check configuration

Check configuration

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Check configuration

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The DP master sends a Check-Configuration telegram to the DP slave to confirm its configuration. For this purpose it transmits an SRD service to SAP 62. The slave responds with a short confirmation (one character).

 

Addr

Msg type

Req Res

SAPS

Len

Data

1->22

Chk Configuration

Req

62-> 62

2

11 21

1<-22

Ack

Res

 

 

 

 

After the configuration check, the DP slave switches state from "Wait Configuration" (WCFG) to the "Data Exchange" state (DXCHG).

 

The slave accepts this telegram with a short confirmation. If the configuration in this telegram does not match the configuration in the DP slave, i.e. is not compatible, a positive short confirmation is still sent. However, in the next diagnostic telegram a configuration fault Cfg_Fault will be signalled. An exception is possible if the Check_Cfg_Mode bit in the Set_Parameter telegram has been set.