Descriptions of the PLC subroutines
3.22 Subroutine 49 - GearChg1_Auto (automatic spindle gear change)
PLC Subroutines Manual
56 Operating Instructions, 12/2012, 6FC5397-2EP10-0BA0
3.22 Subroutine 49 - GearChg1_Auto (automatic spindle gear change)
Purpose
Subroutine 49 is used to automatically change the gear for the analog spindle with 2-level
gear detection signals.
During a gear change, the spindle oscillates and the PLC outputs the gear change signal.
When the PLC detects that the desired gear level has been reached, the gear change has
been completed.
You cannot use this subroutine together with subroutine 50.
Local variable definition
Table 3- 21 Inputs
Name Type Description
D_CHG WORD Gear change delay time (unit: 0.01 s)
D_MON WORD Gear change monitoring time (unit: 0.01 s)
D_S0 WORD Spindle stop delay time (unit: 0.01 s)
T_GC WORD Monitor time for whole gear change process, must > D_CHG + D_MON
+ D_S0 (unit: 0.01 s)
S_hold BOOL Signal of zero spindle velocity (NO)
S_alarm BOOL Spindle alarm (NO)
LGi BOOL Low detection switch (NO)
HGi BOOL High detection switch (NO)
Table 3- 22 Outputs
Name Type Description
LGo BOOL Low gear output
HGo BOOL High gear output
LG_LED BOOL Status display for the low gear
HG_LED BOOL Status display for the high gear
Assigned global variables
HGom BOOL M248.0 Signal indication of high gear stage output
LGom BOOL M248.1 Signal indication of low gear stage output
HGcmd BOOL M248.2 High gear level command
LGcmd BOOL M248.3 Low gear level command
SPhold BOOL M248.4 Spindle stops and ready for oscillation
Dstill BOOL M248.5 Signal for spindle stop
Dchg BOOL M248.6 Spindle gear change delay
Dmon BOOL M248.7 Monitoring for the gear change
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