8 Diagnosis 01.99
6FC5198-6AA60-0BP1 © Siemens AG 1999 All Rights Reserved
8-12 SINUMERIK 840C, OEM Version for Windows (BA)
8.3 PLC Status
The PLC Status display is used to provide the commissioning engineer with
additional information on error codes and on the signal status on the interface.
Fig. 8-6 Error coding in the Diagnosis area
Note: From SW 6 and higher error search in menu
8.4 NC Service
In addition to other start-up and diagnostic functions, the NC Service area can
be used to perform a drift compensation on the axes.
The cause of the drift is attributable to the temperature dependency of
semiconductor components in the motor actuator unit. The axes drift from the
setpoint position and a permanent offset results.
If the < or > indicators remain visible following a traversing movement with
stationary axes, the drift has exceeded the values defined in MD 204* or MD
208* and a drift compensation is required.
The drift compensation is performed semi-automatically and is activated by
softkey.
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