PI MS249E - On-Target State

3 Product Description
C-863.12 Mercury Controller MS249E Version: 1.2.1 23
Control value corrections regardless of the operating mode
The parameters listed below correct the control value both in closed- and open-loop operation.
Parameters
Description and Possible Values
Notch Filter Frequency 1
(Hz)
0x94
Frequency of the first notch filter
40 to 20000 Hz
The appropriate frequency component is reduced in the control
value to compensate for undesired resonances in the mechanics. An
adjustment can be particularly useful in the case of very high loads.
Notch Filter Edge 1
0x95
Rise of the edge of the first notch filter (dimensionless)
0.1 to 10
This parameter value should not be changed.
3.5.10 On-Target State
In closed-loop operation, the on-target state can be used to check whether the target position
has been reached:
▪ On-target state = true (1): the target position is considered as reached
▪ On-target state = false (0): the target position is considered as not reached
The C-863.12 determines the on-target state on the basis of the following criteria:
▪ Settling window around the target position (parameter 0x36)
▪ Delay time for setting the on-target state (parameter 0x3F)
The on-target state has the value true in the following cases:
▪ The current position is inside the settling window and stays there at least for the
duration of the delay time.
▪ If the value for the delay time is set to 0: The end of the dynamics profile is reached.
The on-target state can be read with the ONT?, #4 and SRG? commands.
In the On Target trigger mode (p. 80), the on-target state of the selected axis is output at the
selected trigger output.
Parameter
Description and Possible Values
Settling Time (s)
0x3F
Delay time for setting the on-target state
0 to 1.000 s
Settling Window
(encoder counts)
0x36
Settling window around the target position
0 to 2
31
counts of the encoder
Specifies the window limits. If the current position exits the settling
window, the target position is no longer considered as reached.
The parameter value corresponds to half the width of the window. It
can be changed only if the servo mode is switched off.