OMA? Get Open-Loop Target Position
Description:
Queries the last valid commanded target position for open-loop op-
eration.
Long description
The target position for open-loop operation is changed with
Format:
OMA?{␣[<AxisID>]}
Arguments:
<AxisID>
Axis ID
Response:
{<AxisID>=<Position>
␊
}
<AxisID>
Axis ID
<Position>
the last valid commanded target position for
open-loop operation in physical units (format:
FLOAT)
OMR Relative Open-Loop Motion
Used in: Motion in open-loop operation (33)
Description:
Moves the specified axis relative to the last commanded target posi-
tion for open-loop operation.
Long description
The specified axis is moved along the specified distance relative to
the last commanded target position.
Motion is performed in open-loop nanostepping mode. The velocity
in open-loop step mode is controlled via the step frequency (param-
eter
).
Servo mode must be switched off for the specified axis (axes) (open-
loop operation).
Position control is not done with OMA (i.e., the target position is not
held in the servo loop). Depending on the type of drive connected to
the axis (axes), overshooting is possible due to the E-871.1A1N's dy-
namics profile (velocity, acceleration). The controller compensates
this by moving the axis back the corresponding number of steps.
Format:
OMR{␣<AxisID>␣<Distance>}
Arguments:
<AxisID>
Axis ID
<Distance>
Distance that the axis has to travel, specification
in physical units (format: FLOAT)
Troubleshooting:
Illegal axis identifier
Servo mode active (
HID control is enabled
9 COMMAND REFERENCE
PZ285EN
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1/30/2019
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