Siemens SINUMERIK 828D Programming Manual page 560

Tables
16.5 Predefined subroutine calls
The SPI function can also be used to program a spindle instead of an axis: GET(SPI(1))
#) The keyword is not valid for NCU571.
** Acknowledgement mode:
Commands are acknowledged on request from the executing component (channel, NC,
etc.).
Without acknowledgement: Program execution is continued when the command has been
transmitted. The executing component is not informed if the command cannot be executed
successfully. Acknowledgment mode "N" or "n".
Synchronous acknowledgement: The program execution is paused until the receiving
component acknowledges the command. If the acknowledgement is positive, the next
command is executed.
If the acknowledgement is negative an error is output.
Acknowledgement "S", "s" or to be omitted.
For some commands, the acknowledgement response is predefined, for others it is
programmable.
The acknowledgement response for program-coordination commands is always
synchronous.
If the acknowledgement mode is not specified, synchronous acknowledgement is the default
response.
19. Data access
Keyword / 1st
subroutine parameter
identifier
CHANDATA INT:
Channel
number
20. Messages
Keyword / 1st
subroutine parameter
identifier
MSG STRING:
STRING:
signal
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Explanation
Set channel number for channel data access (only permitted in initialization block);
the subsequent accesses refer to the channel set with CHANDATA.
2nd Explanation
parameter
INT: Message modal: The message is active until the next message is queued.
Continuous-
If the 2nd parameter = 1 is programmed, e.g. MSG(Text, 1), the message will
path-mode
even be output as an executable block in continuous-path mode.
call
parameter
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
Fundamentals