ASCII | 3964R | RK512
Error diagnosis and remedies
25
If errors occur during communication, you can also carry out PROFIBUS diagnostics with
the DP master. The device-specific diagnostics data contains the following information:
1 byte header for device-related diagnostics
0x02
1 byte bit-mapped to indicate the error
Bit 0 = 1
Parameter error
Bit 1 = 1
Send error
(3964R · RK512)
Bit 2 = 1
Receive error
RUN LED code Status
Significance
Remedy
RUN LED off
SPI 3 not ready
– 24 V supply not present
– Check external power sup-
ply
– Check the wiring
RUN LED short Interface error
– Interface parameters
invalid
– Check the parity (e.g. you
have chosen 7 data bits
without parity although 7
data bits requires parity)
RUN LED medium Send error
– Error when sending
– Check the wiring
– Check whether the partner
station is ready (this error
should only occur with
3964 and derived proto-
cols)
RUN LED long
Receive error
– Error when receiving
– Check character format
and data transfer rate of
partner station
RUN LED on
Communication OK
– Serial partner communicat-
ing correctly with the SPI 3
– SPI 3 working correctly
