GE Industrial Solutions AF-600 FP Profibus DP - Manual (Page 74)

8 Troubleshooting
8.1 Diagnostics
PROFIBUS-DP provides a flexible means of performing diagnostics of slave units, based on diagnostics messages.
During normal cyclical data exchange, the slave can set a diagnostics bit, which requests the master to send a diagnostics message during the next scan cycle,
instead of the normal data exchange.
The slave then answers the master with a diagnostics message consisting of standard diagnostics information, 6 bytes, and possibly extended, vendor specific,
diagnostics information. The standard diagnostics messages covers a rather limited range of general diagnostics possibilities, whereas the extended diagnostics
function offers very detailed messaging specific to the frequency converter.
The extended diagnostics messages for the frequency converter can be found in the section Warning word, extended status word and alarm word.
A master or a network analysing tool will be able to translate these diagnostics words into real text messages using the GSD-file.
NB!
DP V1 diagnostics is supported for Profibus SW version 2 and later versions. This means that the default setting of the Profibus option is DP V1 diagnostics. If
DP V0 diagnostics is required, the setting under DP slave Properties must be changed.
8.2 Troubleshooting
8.2.1 LED Status
First, check the LEDs. The two bi-colour LEDs on the PROFIBUS module indi-
cate the status of PROFIBUS communication. The lower LED indicates the Net
status, i.e. the cyclical communication to the PROFIBUS master. The upper
LED indicates the Module status, i.e. acyclical DP V1 communication from
either a PROFIBUS Master Class 1 (PLC) or a Master Class 2 (DCT-10).
AF-650 GP/AF-600 FP Profibus DP Operating Instructions
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