Dead Band Eliminator

Default: 0
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:

In RMCWin, on the Tools menu, click Module Configuration.
In the Slots list, click the CPU.
Click Slot Options. The RMC100/101 CPU Options dialog box will be displayed.
Click the Deadband tab.
Select an algorithm.
Click Update RMC.
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.