Siemens Sinumerik 802D sl Instruction Manual page 167

Table 11-1 Start-up modes, continued
PCU
Switch-on menu Start-up menu
(802D)
Overall reset
and debug mode
* "System" hardkey system/"Start-up" softkey/NC
** "System" hardkey system/"Start-up" softkey/PLC
*** is loaded from the permanent memory into the RAM
Thanks to the debug mode (see "Operation and Programming", Chapter 7), the PLC remains
in PLC Stop after booting of the control system. All start-up modes set via softkey only come
into effect when the control system is booted the next time.
The "Run" mode activates the cyclic operation.
The following actions are triggered in the "Stop" mode:
S All hardware outputs are disabled.
S Profibus DP is inactive.
S No cyclic operation (the active user program is not executed).
S The process image is no longer refreshed (it is frozen).
S EMERGENCY STOP active.
Only in the "Stop" mode can the user load a corrected or new project into the control system.
The user program only becomes effective when the control system is booted the next time
or if the "Run" mode is selected.
Siemens Automation Parts
SINUMERIK 802D sl Instruction Manual (BA), 05/2005 Edition
6FC5 397-0CP10-1BA0
PCU PT PLC 802
(PC)
(802D)
PLC Program
program status
preselec-
tion
User pro- Stop
gram ***
Starting Up the PLC
11.2 Start-up modes of the PLC
Retentive MD for the
data PLC in the
(battery bak- user interface
ked)
deleted Acceptance
of the active
PLC MD
11-165