Siemens SINUMERIK 840DE Programming Manual page 459

The acknowledgment behavior is defined for some commands and programmable for others.
The acknowledgment behavior is always synchronous for program coordination commands.
If the acknowledgment mode is omitted, synchronous acknowledgment is taken as the
default.
19. Data access
1st
parameter
CHANDATA INT:
Channel
number
20. Messages
1st
parameter
MSG STRING:
signal
22. Alarms
1st
parameter
SETAL INT: Alarm
number
(cycle
alarms)
23. Compensation
Vocabulary 1st
word/subpro parameter-
gram 4th
identifier parameter
QECLRNO AXIS: Axis
N number
QECLRNOF
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
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
Message modal: The message is active until the next message is queued
2nd Explanation
parameter
Set alarm: Sets alarm
Explanation
Quadrant error compensation learning ON Quadrant error compensation
learning ON
Quadrant error compensation learning OFF: Quadrant error compensation
learning OFF
12.4 List of predefined subprograms
Tables
12-53