In position, C.1.19 in position – Delta RMC101 User Manual
Page 784
RMC100 and RMCWin User Manual
C-14
Range: 0 to 2000
Some valves and drives do not react to small changes in output around the null drive value; this
effect is termed "dead band". The Dead Band Eliminator helps alleviate this problem by applying
extra drive.
The RMC100 has two different Deadband eliminator algorithms:
• Proportional (recommended)
The number of millivolts specified in the Dead Band Eliminator value is added to or subtracted
from the drive output (depending on the direction of travel) when the Actual Position is outside of
the In Position window. This causes the drive to be outside of the deadband. When the Actual
Position is within the In Position window, the drive is applied proportional to the distance from
the actual position. The Integral gain is always held at its current value. This algorithm is the
recommended algorithm.
• Immediate (RMC100 default)
The number of millivolts specified in the Dead Band Eliminator value is always added to or
subtracted from the drive output (depending on the direction of travel) so the drive output is
outside the dead band.
Note:
In RMC100 CPU firmware prior to 20030916, the Dead Band Eliminator always used the
immediate algorithm.
If a value outside the valid range is entered, the parameter error bit will be set, and the value will
be set to zero.
CAUTION:
Do not make this value too large or the drive will oscillate.
Selecting a Deadband Algorithm
To select a Deadband algorithm follow these steps:
1. In RMCWin, on the Tools menu, click Module Configuration.
2. In the Slots list, click the CPU.
3. Click Slot Options. The RMC100/101 CPU Options dialog box will be displayed.
4. Click the Deadband tab.
5. Select an algorithm.
6. Click Update RMC.
7. The Update Module Configuration dialog box will be displayed to indicate the progress. If the
module could not be reset automatically, you may be prompted to reset the module yourself.
C.1.19 In Position
Default: 50
Range: 0 to 65535
This parameter specifies the size of a window around the Command Position. When the Actual
Position gets within this window, the In Position bit is set in the Status word. Notice that the In
Position bit is not latched and therefore could go off again if the axis moves back outside the In
Position window.
Example: