■
If the positioner does not have integrated limit switches: Hard stops
Settings for the travel range
The following parameters of the E-871.1A1N reflect the physical travel range of the
positioner:
■
Value At Reference Position (Phys. Unit) (0x16)
■
Distance From Negative Limit To Reference Position (Phys. Unit) (0x17)
■
Distance From Reference Position To Positive Limit (Phys. Unit) (0x2F)
Settings for the soft limits
The E-871.1A1N determines the soft limits using the Maximum Travel In Positive Direction
(Phys. Unit) parameter (0x15) and Maximum Travel In Negative Direction (Phys. Unit)
parameter (0x30):
■
Maximum Travel In Positive Direction (Phys. Unit) (0x15) und Maximum Travel In
Negative Direction (Phys. Unit) (0x30):
■
The limits determine the limits for the permissible travel range.
■
Motion commands are executed only if the commanded position is within these soft
limits.
■
The limits always refer to the current zero position.
■
Appropriate values are loaded when the positioner is selected from the positioner
database.
The Range Limit Min parameter (0x7000000) and Range Limit Max parameter (0x7000001)
are available in the E-871.1A1N for compatibility reasons but have no function.
Commands
Parameters
0x16
Value At Reference
Position (Phys. Unit)
Position value at the reference point switch.
The current position is set to this value if the
axis has performed a reference move to the
reference point switch.
The parameter value is also used for calculating
the position values set after reference moves to
the limit switches; this also applies when the
mechanics do not have a reference point switch.
0x17
Distance From
Negative Limit To
Reference Position
(Phys. Unit)
Gap between reference point switch and
negative travel range limit.
The current position is set to the difference
between the values of parameters 0x16 and 0x17
if the axis has done a reference move to the
negative travel range limit.
0x2F
Distance From
Reference Position To
Positive Limit (Phys.
Unit)
Gap between the reference point switch and the
positive travel range limit.
If the axis has done a reference move to the
positive travel range limit, the current position is
set to the sum of the values of parameters 0x16
and 0x2F.
4 PRODUCT DESCRIPTION
PZ285EN
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1/30/2019
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