8 PLC Start-Up
8.1 Start-up prerequisites
General reset of
deleting NC data
General reset of the PLC and deletion of NC data can be performed using
840Di Start-up or HMI Advanced.
– Start: Windows NT taskbar: Start > Programs > SINUMERIK 840Di >
– Open the dialog box: Menu command Window > Diagnosis > NC/PLC
HMI Advanced (840Di SW 2.2 and higher and HMI Advanced SW 6.2)
– Open the dialog box: Operating area switchover > Start-up > NC/PLC
Proceed as follows in the dialog boxes:
1. General PLC reset
The following parameters are reset by the general PLC reset:
– MPI address of the PLC = 2
– MPI data transfer rate = 1.5 Mbit/s
2. Delete NC data
Button: "General NCK reset"
3. Trigger NC reset
In order to start cyclic operation or NC/PLC communication, NC reset (but-
ton: "NCK Reset") must be initiated:
The subsequent power up of the SINUMERIK 840Di is successfully completed
if the following display appears in the dialog:
6 NCs in cyclic operation
LED RUN lights continuously.
Since no PLC program is executed after general PLC reset, the following
alarms are displayed:
Alarm: "120201 Communication failed"
Alarm: "380040 PROFIBUS DP: Configuring error 3, parameter"
Alarm: "2001 PLC not booted".
These alarms have no influence on how to continue.
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition