Siemens SINUMERIK 828D Function Manual page 579

Sequence during activation through power-up
1. Control activates after power-up reset-sequence with evaluation of machine data:
MD $MC_RESET_MODE_MASK
$MC_GCODE_RESET_VALUES
$MC_GCODE_RESET_MODE
2. Implicit call of _N_PROG_EVENT_SPF as ASUB
3. Control activates reset-sequence with evaluation of machine data:
$MC_RESET_MODE_MASK
$MC_GCODE_RESET_VALUES
$MC_GCODE_RESET_MODE
⇒ The G code reset position continues to be set with machine data!
Signal chart
The following diagrams show the signal chart of the NC/PLC interface signals DB21, ... DBB35 ("Program status"
and "Channel status") in case of event-driven program call:
Figure 9-9 Signal chart in case of activation through part program start and part program end
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
K1: Mode group, channel, program operation, reset response
9.9 Program operation mode
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