Siemens 6RA7086-6KS22 Operating Instructions Manual page 381

05.05
Numeric representation of parameter numbers and values on serial interfaces
The mode of numeric representation of a parameter value is determined by the parameter "type"
assigned to each parameter in the Parameter List. The different types of parameter are explained at
the beginning of the list. Parameters are always transmitted in the form specified in the "Value range"
column of the Parameter List; any decimal point, however, is omitted (example: display value
→
123.45 the number 12345d = 3039h is transferred via the serial interface).
Diagnostics and monitoring functions for USS interfaces
All transmitted and received useful data words can be checked (directly at the internal software
transfer point from/to USS driver) by means of display parameters r810 / r811, r812 / r813 or r814 /
r815.
Diagnostic parameters r789, r799 or r809 provide information about the chronological distribution of
errored and error-free telegrams, as well as the nature of any communication errors that have
occurred.
A watchdog can be set in P787, P797 or P807 which can initiate a shutdown on faults (F011, F012 or
F013) in the case of timeout. By connecting binectors B2031, B6031 or B9031 to the fault message
triggers (using P788=2031 / P798=6031 / P808=9031), it is possible to acknowledge these fault
messages even if the fault is active continuously, thereby ensuring that the drive can still be operated
manually after the USS interface has failed.
Important !
The serial interfaces for the USS protocol are parameterized with the same parameters used to
configure the peer-to-peer protocol, although the setting ranges are different in some cases (see
Notes for relevant parameters in Parameter List, Section 11).
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SIMOREG DC Master Operating Instructions
Function descriptions
9-25