Siemens Simovert Masterdrives Compendium page 228

09.2008
Mode management
NOTE
Siemens AG 6SE7087-6QX70 (Version AK)
SIMOVERT MASTERDRIVES
The mode management and setpoint transfer block can be found on
function diagram 789a and is assigned to a time slot by means of
U953.60.
The mode management function block interlocks the homing,
positioning and setup modes against each other. This interlocking
ensures the priority of the modes.
Priorities:
→ homing
REF_ON
→ positioning
POS_ON
SETUP_ON → setting up
Transfer between the modes takes place on the fly. A mode change
can be carried out without a drop in speed. The priorities are always
taken into account, even if modes are selected simultaneously.
Example:
If all modes are selected simultaneously REF_ON = 1 with REF_TYP =
1, POS_ON = 1, SETUP_ON = 1, homing movement always has
priority. If homing movement is deselected (REF_ON = 0 with
REF_TYPE = 1), the positioning mode is effective.
Homing on the fly (REF_TYPE = 0) is always effective with REF_ON
and has no effect on the priority.
If positioning is also deselected, the setup mode immediately becomes
active.
Mode management also safeguards the sequence control of the
homing movement, i.e. homing movement with preferred direction
evaluation and reversing cams.
This mode permits the positioning block to travel to and fro in SETUP
= 1 using the reversing cams REF_BWD_STOP, REF_FWD_STOP
until REF_STOP [ARFD] = 1 is achieved.
See "Homing movement" section for further information.
Compendium Motion Control
= highest priority
= second highest priority
= lowest priority
Functions
7-19