Instruction manual

Model 2090 Multi-Device Controller

indicators will light to represent the lower two bits of the

speed selection in a binary fashion as shown below:

Speed 1 or 5: Both off

Speed 2 or 6: Top on, bottom off

Speed 3 or 7: Top off, bottom on

Speed 4 or 8: Both on

For all devices, each speed setting has its own individual

overshoot compensation value to provide proper overshoot

correction for each speed selection. Thus, the Model 2090

can properly compensate for two speed devices that have

different overshoot for each speed. However, the

deceleration ramp control provided by variable speed

devices will normally make overshoot compensation

unnecessary. The device will decelerate prior to reaching

the target value and creep in at the minimum speed. For

these devices, it is recommended that the

OC parameter be

used to disable overshoot compensation.

NOTE: While the 2090 will allow changing of the speed

selection while the device is in motion, doing so is likely to

cause targeting errors which may result in overshoot or

undershoot of the target position.

Revision G– P#399199