Command: Open Loop Rate (10)

Supported Axes:	Control Axes
Supported Control Modes:	All

See the Commands Overview topic for basic command information and how to issue commands from PLCs, HMIs, etc.

Command Parameters

Parameter Description

Range

Requested Output (RMC75/150: V)

(RMC200: %)

RMC75/150: -10≤V≤10

RMC200: -100≤%≤100

Output Ramp Rate (RMC75/150: V/sec)

(RMC200: %/sec)

"%" refers to the percent of Control Output.

Description

This command puts the axis in open loop control and ramps the Control Output linearly to the Requested Output at the rate specified by the OutputRamp Rate.

This command is identical to the Direct Output (9) command, except that this command does not disable the Auto Stops . Therefore, the Open Loop Rate (10) command should be used in all cases where open loop is required during the regular machine cycle, and the Direct Output (9) command should only be used to test the Control Output during setup.

When choosing the Open Loop Rate (10) command, the default value of the Ramp Rate is 100 V/sec or 1000 %/sec, which may be a very abrupt stop on some systems. You should consider what value of ramp rate your application requires, and not necessarily use the default value.

Why Bother?

Use this command when you want to give an Open Loop Control Output to the axis. Open Loop is good for making the axis move when you don't care about going exactly at a certain speed or reaching an exact position.

Target Generator State Bits

The Target Generator bits in the Status Bits register indicate which portion of the move the axis is currently in. These bits are useful when programming complex motion sequences.

Target Generator Done bit

This bit indicates the move is complete, which occurs when the Control Output has reached the Requested Output.

Target Generator State A and B bits

B	A	Description
0	0	Constant Control Output at 0 volts
0	1	Ramping Control Output away from 0 volts
1	0	Constant Control Output at a non-zero voltage
1	1	Ramping Control Output toward 0 volts