Axis Type: Cascading Outer Loop

A Cascading Outer Loop axis is used as the outer loop of cascaded axes. A cascading outer loop axis is identical to a control axis, but it provides a virtual Control Output, and does not use a physical Control Output. This is only for advanced applications. For details, see the Cascade Control and control axis topics.

For descriptions of all available RMC axis types, see the Axis Types Overview topic.

There are two types of cascading outer loop axes:

1. One-Input Control Axis

A control axis that controls a single quantity, such as position or pressure, is called a one-input control axis.

One-Input Control Axis Types	Required Inputs	Transducer Types
Position	1	MDT, SSI, Analog, Quadrature, Resolver
Velocity	1	Analog Voltage or Current
Pressure	1	Analog Voltage or Current
Force	1 or 2	Analog Voltage or Current, or mV/V

Note:
A force input requires 1 analog or mV/V input if a load cell is used, and 2 analog inputs for differential force on a hydraulic cylinder. In the differential case, it is still considered one input, since it is only one final quantity.

2. Two-Input Control Axis

A control axis that controls two quantities, such as position and pressure, is called a two-input control axis. Notice that the secondary inputs must always be analog or mV/V inputs.

Two-Input Control Axis Types	Required Primary Inputs	Required Secondary Analog or mV/V Inputs
Position-Pressure	1	1
Position-Force	1	1 or 2
Position-Acceleration	1	1 or 2
Velocity-Pressure	1	1
Velocity-Force	1	1 or 2
Velocity-Acceleration	1	1 or 2

Creating a Cascading outer Loop Axis

For details on defining axes, see the following topics:

Defining Axes

Axis Definitions: Dialog

Axis Definitions: Edit