Enable Output

The Enable Output is a purpose-specific output that is intended to be connected to a drive or amplifier. Using the Enable Output is optional and does not affect the Control Output. With the Enable Output, a drive or amplifier can be turned on or off.

Behavior

RMC75/150

The Enable Output can be turned on and off with the Set Enable Output (67) command. The Enable Output will turn off when a Direct Output Halt occurs, unless the axis' Direct Output status bit is already on.

RMC200

The Enable Output can be turned on and off with the Set Enable Output (67) command. When an axis becomes enabled, the Enable Output will turn on. The Enable Output will turn off when a Direct Output Halt or Disable Axis Halt occurs.

Supporting Modules

RMC75/150

On the RMC75 and RMC150, only dedicated Enable Outputs can be used as Enable Outputs. The modules listed below have one Enable Output per Control Output.

RMC75:MA, AA, QA

RMC150:Quad (Q)

RMC200

Any discrete output on any RMC200 module may be used as an Enable Output, as defined by the Enable Output parameter.

The CA4 module has one Enable Output per Control Output intended for use as an Enable Output, but may be used a general-purpose discrete output as well.

The CV8 module has eight discrete I/O points that may be used general-purpose discrete outputs, or as Enable Outputs.

The U14 module has four discrete I/O points that may be used general-purpose discrete outputs, or as Enable Outputs.

The CA4, CV8, and U14 discrete outputs are not assigned to function as an Enable Output by default. To assign it to function as an Enable Output, see Configuring an Enable Output below.

Configuring an Enable Output

RMC75/150

In the Axis Parameters, on the All tab, expand the Output section.
Set the Enable Output Behavior parameter to define whether the solid state output relay should be open or closed when the Enable Output is active.

RMC200

In the Axis Parameters, on the All tab, expand the Output section.
For the desired axis, click the Enable Output parameter.
From the drop-down list, choose a discrete output.
1. If you wish to use the dedicated Enable Output on the CA4, choose Dedicated.
2. The other discrete outputs on the RMC are listed by the IEC address of %QXs.n, where s is the slot number and n is the number of the IO point on the module.
  The slot numbering s begins with 0 for the power supply, 1 for the CPU, 2 for the first IO module slot, etc.
Set the Enable Output Behavior parameter to define whether the solid state output relay should be open or closed when the Enable Output is active.

Additional Uses

On the RMC75 and RMC150, the physical Enable Output can be used as a general-purpose input by setting all the axis' Autostops to something other than Direct Output Halt, which will prevent the Enable Output from turning off when an axis halts. It can be turned on and off with the Set Enable Output (67) command. However, the output will not appear in the Discrete I/O Editor or Discrete I/O Monitor, and cannot be assigned a user tag name.

On the RMC200, if the Enable Output axis parameter is set to none, the physical Enable Output can be used a general-purpose input. The input will be listed in the Discrete I/O Editor and can be assigned a user tag name.

Specifications

For specifications, refer to the topic of the specific module containing the Control Output.