Manual – IPOSplus®
323
23
Positioning commands
Assembler – Commands
23.6 Positioning commands
23.6.1 Reference travel GO0
GO0
The GO0 command triggers reference travel or sets an absolute encoder. In doing so,
the operating status and the 7-segment display changes from "A" (technology option) to
"c" (reference mode).
Operating mode P700
is not affected.
The argument of GO0 and parameters P900 -P903 determine the reference travel be-
havior.
The argument is a combination of 3 characteristic properties (C/U; W/NW; ZP/CAM) re-
sulting in 8 selection options. RESET can be used to interrupt reference travel.
Parameter settings
514597259
C
(conditional)
Only performs reference travel if the drive has not been referenced already
(that is, H473, Bit 20 = 0).
U
(unconditional)
Always performs reference travel.
W
(wait)
Waits until the axis has been referenced. No other task is performed in the
mean time.
NW
(non-wait)
The next command is processed during reference travel (recommended).
ZP
(zero pulse)
References to the zero pulse of the encoder signal (not significant if 903 = 0
or P903 = 5).
CAM
(reference cam)
References to the reference cam (not significant if 903 = 0 or P903 = 5).
RESET
Reference travel which has started is interrupted (brakes at positioning
ramp) and the call is reset. For a reference axis, the message "Axis refer-
enced" is reset and the message "Axis in position" is set.
P60_
If a reference cam is used, one input must be set to the REFERENCE CAM function.
P900
Reference offset (writes H498).
P901/
P902
Reference speeds.
P903
The reference travel type and the argument ZP / CAM determine the condition required to end
reference travel.
Example: P903 = 1, GO0 U,W,ZP
The zero pulse is evaluated according to the reference cam.
P904
Not significant for GO0.
INFORMATION
The controller must be enabled to set an absolute encoder using the GO0 command.
Alternatively, the encoder can be set without an enable by setting the offset P905 for
Hiperface
®
or the parameters P953 ... P955 for an SSI encoder (DIP) .
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