Siemens SINUMERIK 808D ADVANCED Parameter Manual page 409

PMS1: Signal state 1
PMS2: Signal state 1
Signal state 0
Parameter Manual
Parameter Manual, 08/2015, 6FC5397-8EP40-0BA1
As it is not possible to use both position measuring systems simultaneously
for the position control of an axis / spindle, the control automatically selects
position measuring system 1. If a position measuring system 2 also exists,
this actual value is also acquired.
1. The axis is in the park position. This means that the following features
are valid:
– The position measuring system is inactive.
– There is no actual value acquisition.
– The monitoring functions of the position measuring system have been
disabled (among others, the cable connection of the measuring value
encoder).
The reference point is ineffective:
The IS "Referenced/synchronized 1/2" has signal state 0.
As soon as an axis is in the parked position, the interface signals:
DB390x DBX1.5 (position controller active),
DB390x DBX1.6 (speed controller active) and
DB390x DBX1.7 (current controller active)
are set to a 0 signal.
After parking has been completed the axis must be re-referenced
(reference point approach).
If IS "Position measuring system 1" is set to a 0 signal while the axis
is moving, the axis is stopped with a ramp stop without the controller
enable being internally withdrawn in the control. This is appropriate
for the following situations:
– Spindle encoder no longer outputs a signal above a certain speed
(no longer supplies any pulses).
– Spindle encoder is decoupled mechanically because it would not be
able to handle the speed.
As a consequence, the spindle can then continue to run in speed-
controlled mode. In order to really bring the axis / spindle to a stop,
the controller enable must always be removed additionally by the
PLC.
2. The spindle does not have a position measuring system and is only speed
controlled. In this case, IS "Controller enable" should be set to a 1 signal.
Detailed descriptions of interface signals
5.8 Axis / spindle-specific signals
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