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05.91
8 Spindle/PLC Interface (DB 31)
8.2 Signals from spindle
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SPINDLE POSITION REACHED
DW K, bit 12
1 signal:
Actual spindle in defined range (set range) about the programmed setpoint.
0 signal:
Actual spindle position outside defined range.
Signal chart
t
v
t
1
2
3
3
4
5
6
1: Actual spindle position
2: Setpoint
3: Positional tolerance
4: Position control switched on
5: SPINDLE POSITION REACHED signal
6: ACKNOWLEDGE M 19 signal (from PLC, t
v
= delay time)
Notes:
•
The signal is relevant only if the spindle is operating in positioning mode (e.g. M19).
•
The set range is determined by the following data:
– The setpoint
– MD 443* "positional tolerance" with spindle positioning by NC or PLC
– The position limit in the user data DB with "M19 over several revolutions" from the
command channel
•
The signal is reset in the event of overshooting beyond the set range (e.g. owing to poor
optimization of the position controller).
•
The ACKNOWLEDGE M19 signal must not be given by the PLC user program until the
spindle has settled in position (e.g. after delay time t
v
during which SPINDLE POSITION
REACHED was continuously set).
Example of application:
Tool change enable on milling machines.
©
Siemens AG 1991 All Rights Reserved 6ZB5 410-0HE02
8
–
7
SINUMERIK 880 (PJ)