Siemens SINUMERIK 840D sl Function Manual page 194

H1: Manual and handwheel travel
4.10 Position travel in JOG
Alarm 17822 "Channel %1 Axis %2 jogging to position: position changed"
The JOG traverse must be triggered again to approach the new position.
Note
To avoid the alarm message, the machine user should proceed as follows:
1. Cancel the current traverse movement with residual distance deletion.
2. Enter a new position in SD43320 after axis has come to a standstill.
3. Restart the JOG motion.
Retraction from the position/deactivation
To retract from the position, the function "Position travel in JOG" must be deactivated. This is
done by resetting the activation signal to "0".
DB31, ... DBX13.3 = 0
The deactivation also resets the message signals DB31, ... DBX75.6 and DB31, ... DBX75.7.
Retraction in the opposite direction
The behavior when retracting from the position in the opposite direction depends on the setting
of bit 2 in the machine data:
MD10735 $MN_JOG_MODE_MASK (settings for the JOG mode)
Retraction in the opposite direction is possible only if the bit is set.
If the bit is not set, retraction in the opposite direction is blocked, and the following channel
status message is output if an attempt is made with the traverse keys or with the handwheel
to exit the approached position in the opposite direction:
"JOG: Direction blocked <axis>"
Special case: axis is already at position
The axis cannot be traversed if the axis is already at the position to be approached when
starting the JOG motion. This is displayed through the following channel status message:
"JOG: position reached <axis>"
To retract, the function "Position travel in JOG" must be deactivated.
Special features of incremental travel
If, during incremental travel, the position is reached before the increment is completed, then
the increment is considered to have been completed fully. This is the case even when only
whole increments are traveled.
MD11346 $MN_HANDWH_TRUE_DISTANCE = 2 or 3
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Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions