ALSPA PROFIBUS Field Bus Coupler
8. Menu 75 Parameters
(09/06)
Technical Manual
Page 8-9
8.5.13
Data Spy Parameters P75.36 to P75.41
The Data Spy parameters can be used to help debug and
commission the PROFIBUS board as well as monitoring data
transactions during normal operation. Using the spy area of
Menu 75 it is possible to monitor data received by the module, in its
unmodified form. The data is available in parameters P75.36 to
P75.41 and corresponds to the six 16 bit words of data received by
the module from the PROFIBUS interface.
The values are displayed in decimal with no scaling and should be
exactly what the PROFIBUS-DP Master is transmitting.
8.5.14
Data Errors P75.42 to P75.45
When transferring data between the PROFIBUS link and the Drive
parameters, several possible errors could occur. If an error does
occur then it is logged in P75.42 or P75.44. Parameters P75.42
and P75.44 log the errors that occurred transferring the data and
P75.43 and P75.45 log the total number of errors. The error format
is as follows:
Bit 0
Reserved
Bit 1
Parameter write access denied, parameter has ‘R’
attribute set
Bit 2
Data clamped to lower limit before being written
Bit 3
Data clamped to upper limit before being written
Bit 4
Data below bit parameter range and not written
Bit 5
Data above bit parameter range and not written
Bit 6
Reserved
Bit 7
Attempt to write to a stop to edit parameter when
running, data ignored.
Bit 8
Attempt to read from a non-existent parameter
Bit 9
Parameter read access denied.
Bit 10 - 15 Reserved
For each transfer all the data errors are flagged, and a counter is
incremented for each transfer error. Note that the error counter is
allowed to rollover and is reset when the PROFIBUS board is
configured. When writing data outside the normal range of a
5
The above is correct
for software Version 8.00 or earlier.
For software Version 9.00 or later P75.36 to P75.41 are not available.
To view received data set P89.00=P75.00 and view data in P89.01 onward.
For transmitted data set P89.00=P75.30
