24
MOVITRAC
®
31.. PROFIBUS Fieldbus Interface
3
The PROFIBUS-DP
Interface
01179AEN
Fig. 28: Fault message after the timeout period has elapsed
Expiry of the timeout period is indicated on the option pcb by the red
BUS FAULT LED. At the same
time, the inverter also indicates an error on its red Status LED. The error is displayed on the keypad
or on the PC as
Error Fieldbus Timeout (Fig. 28). Depending on the specified fault response, the
inverter may have to be reset to restore its normal status.
For a detailed description of the inverter's timeout behaviour, please refer to the
Fieldbus Unit Profile
User Manual.
Important!
Parameter
571 Fieldbus Timeout can only be set through the timeout period which is configured in
the DP master for the whole DP system. Manual setting of this parameter with the keypad or the
MC_SHELL user interface has no effect, any setting would be overwritten when PROFIBUS-DP is
started up the next time.
3 .4
Diagnostic Data
Station diagnosis of the MOVITRAC
®
31.. inverter can be performed using the DP service
DDLM_Slave_Diag. The inverter also supports unit-related diagnosis. Fig. 27 shows the structure
of the diagnostic data.
01181AEN
Fig. 29: Structure of the diagnostic data for the MOVITRAC
®
31..
Octets 1-7 contain the diagnostic information according to EN 50170 V2 / DIN E 19245 Part 3. As
the header of the unit-related diagnostic data, a value of 2 in octet 7 indicates that the unit-related
diagnostics are 2 bytes in length (incl. header). If there is a fault on the inverter (only then will
external diagnostics be possible), octet 8 will also contain the fault code.
Important!
The unit-related diagnostic information is only updated every 800 ms. This means that an error
message may not be output for 800 ms after the fault occurs. A much faster and simpler method of
detecting faults can be implemented using status word 1 of the MOVITRAC
®
31.. inverter (see
Fieldbus Unit Profile User Manual).
FAULT
FIELDBUS TIMEOUT
Octet 1:
Octet 2:
Octet 3:
Octet 4:
Octet 5:
Octet 6:
Octet 7:
Octet 8:
Station status 1
Station status 2
Station status 3
DP master address
Ident Number (high)
Ident Number (low)
Header
Unit related diagnosis
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