Operating Instruction - Siemens SIMATIC S5 Manual

In the axis status "finished", an axis can be changed from one operating mode to any other oper-
ating mode, unless prevented by the restrictions mentioned above. The operating instruction in-
cludes the required operating mode number and a "command". The command can be "start",
"stop", "forward"," reverse" or "enter". The axis then changes to the required mode, The mode is,
however, only executed when the set mode and the command represent a feasible combination,
i.e. "jog speed 1, forward". The relationship between commands and individual modes is ex-
plained in more detail in the description of the modes.
If the input is correct, the axis begins to execute the mode. The axis status changes from
"finished" to "running". Once the mode is completed, the axis returns to the status "finished" and
can be started again.
If the execution of a mode is to be terminated, you once again send an operating instruction
specifying a mode and the command "stop" or the mode "axis off" and "start" to the module. The
axis then changes to the "finished" status of the terminated mode, Modes used for data transfer
or coordinate transformation cannot be terminated, since this could lead to inconsistencies.
In the "jog" and "incremental" modes (BA 1,2,6 and 7) it is also possible to specify a speed at the
start which differs from the speed in the machine data. The speed must be in the valid range
from mm/min (or 1 -650000.1 in/rein or 1-65000 decjmin) and
-65000
I
maximum speed (max. frequency) programmed in the machine data record. If the maximum
speed would otherwise be exceeded, the speed is changed to the maximum upper or lower limit
and the error message "speed range exceeded" is output. If the value "O" is transferred, the
speed selected for this mode in the machine data will be used.
4.1.1

Operating Instruction

- Axis 2 or
- Axis 3
Fig, 4/2 Structure of an operating instruction
The relationship between modes, operating instructions and the axis status can be seen in the fol-
lowing diagram:
e.g. jog
incremental
automatic
etc.
must not exceed the
- According to
the mode
e.g. speed
Principle of Operation
- Start
- stop
- Forward
- Reverse
- Enter
4 - 3