Siemens Sinumerik 840D sl Programming Manual page 110

Feed control
8.4 Positioning spindles (SPOS, SPOSA, M19, M70, WAITS)
In order to synchronize spindle movements, WAITS can be used to wait until the spindle
position is reached.
Requirements
The spindle to be positioned must be capable of operation in position-controlled mode.
Syntax
Position spindle:
SPOS=<value>/SPOS[<n>]=<value>
SPOSA=<value>/SPOSA[<n>]=<value>
M19/M<n>=19
Switch spindle over to axis mode:
M70/M<n>=70
Define end-of-motion criterion:
FINEA/FINEA[S<n>]
COARSEA/COARSEA[S<n>]
IPOENDA/IPOENDA[S<n>]
IPOBRKA/IPOBRKA(<axis>[,<instant in time>]) ; Programming in a separate NC
block.
Synchronize spindle movements:
WAITS/WAITS(<n>,<m>) ; Programming in a separate NC block.
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Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals