AS-i/PROFIBUS-Gateway
Appendix: Example for startup on a Siemens S7
Subject to reasonable modifications due to technical advances.
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AS-i Slave address 2 is a 4 Input module. Input 2 is set.
12.2.7
System behavior on AS-i Config Error
If while running in protected mode a configured AS-i slave fails, an AS-i configura-
tion error is generated.
1.The missing slave is shown on the display of the AS-i/DP Gateway.
2.The input flag AS-i Config Error Bit 4 in Byte 2 is set.
3.If the standard parameters for the PROFIBUS hardware configuration were ap-
plied unchanged for the AS-i/PROFIBUS Gateway, the Gateway sets the ExtDiag
flag in the PROFIBUS data reply. This results in the controller signaling a PROFI-
BUS slave error and invoking OB82. At the same time the event is written to the
diagnostic buffer of the CPU.
If the message for the ExDiagFlag is turned off in the PROFIBUS parameters, no
PROFIBUS message is generated and OB82 is not activated. This is always rec-
ommended for applications which do not have to respond immediately to an error
using OB82. In such cases the status can be processed using the message bit of
the AS-i Flags or the Flags + Fault Detector bits for the normal PLC cycle. Error
management can be structured on the basis of these messages.
