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Technical Information
Profibus Message Mapping
In order to don't overload the controller's internal serial link, following
NOTE
precautions are taken:
The parameters are written from the gateway to the controller only when
their value changes.
The parameters are never read back from the controller to the interface. The
controller's response at the write command (ACK, NACK, etc) is used to
establish if the writing succeed or not.
Diagnostic Management
In addition to the ProfiBus six byte standard diagnostic, the interface
provides both user diagnostic and static diagnostics functions. The
standard diagnostic management is fully compliant with the ProfiBus
specification. During the start-up phase after power on, the first byte
in the user diagnostic area, can assume val-ues different from zero.
This byte has the following meaning:
So, if the first byte is equal to 0, the interface is working properly,
otherwise there is a problem. Each nibble in the bytes following the
interface status byte represents the status of the last at-tempt to
write a parameter with following coding (diag status byte):
0
1
2
3
342/360
Bit 0 = 1: controller not responds (RS485 link broken)
Bit 1 = 1: controller not identified (not compatible with the
ProfiBus gateway)
Bit 2 = 1: first loop of requests not ended (values in the input data
are not fully coherent yet)
Write success
Controller response was "NACK"
Controller response was "Unknown window"
Controller response was "Bad Data Type"
Turbo-V 2K-G Pumping System User Manual / 87-900-968-01 (H)
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Chapitres
