MC_Power. Allen-Bradley Micro800

Below you will find brief information for Micro800 LC10, Micro800 LC20, Micro800 LC30, Micro800 LC50. These Micro800 programmable controllers offer a comprehensive instruction set for various applications, including arithmetic, Boolean logic, communication (CIP, Modbus), and motion control. The manual details ladder diagram programming, function blocks, and data manipulation instructions, enabling users to create sophisticated control systems.

PDF

Document

MC_Power

Motion control instructions Chapter 17

MC_Power controls the power stage (ON or OFF).

MC_Power operation

• After axis power On completes, the axis Homed status is reset to 0 (not homed).

• The Enable_Positive input and the Enable_Negative input of the

MC_Power function block are both level triggered; they are checked when the Enable input changes from OFF to ON. The on-the-fly change for the

Enable_Positive input and the Enable_Negative input without Enable input toggling is not checked.

• If power fails during operation (when Servo ready has been detected) the axis state goes to ErrorStop.

• If the MC_Power function block with Enable set to True is called while the axis state is Disabled, the axis state goes to StandStill if there is not an error, or the axis state goes to ErrorStop if there is an error.

• Only one MC_Power function block should be issued per axis. Using a different MC_ Power function block to control the same axis simultaneously will be rejected by the Motion Engine.

• When there is a Power On/Off state switch for an axis, the absolute axis position is not reset.

• If the MC_Power function block with Enable set to False is called, the axis state goes to Disabled for every state including ErrorStop. The MC_Power function block can do the following:

• Power on the axis if Enable is set to True; Power off the axis if Enable is set to False.

Rockwell Automation Publication 2080-RM001D-EN-E - February 2015 473

Chapter 17 Motion control instructions

Parameter

AxisIn

Enable

Enable_Positive

Enable_Negative

ENO

Axis

Status

Busy

Active

Error

ErrorID

Input

Output

Tip:

If you import a project created in CCW 7 into CCW 8 the Mc_Power new input parameter __DTI_AxisIn shows. If a Build error occurs, reselect the instruction and rebuild.

Arguments

Parameter type

Input

Output

Data type Description

BOOL

UINT

BOOL

AXIS_REF

FB_AXIS_REF

BOOL

AXIS_REF

BOOL

Function block enable.

When EN = TRUE, execute current MC_Power computation.

When EN = FALSE, there is no computation.

Applies only to LD programs.

When TRUE, power is ON.

When TRUE, motion direction is positive only.

When TRUE, motion direction is negative only.

Enable out.

Applies only to LD programs.

Axis output is read-only in LD programs.

State of the power stage:

• When TRUE, drive power on is done

When TRUE, the function block is not finished.

When TRUE, indicates that the function block has control on the axis.

When TRUE, an error is detected.

Error identification.

474 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015

MC_Power function block language examples

Function Block Diagram (FBD)

Motion control instructions Chapter 17

Ladder Diagram (LD)

Rockwell Automation Publication 2080-RM001D-EN-E - February 2015 475

Chapter 17 Motion control instructions

Structured Text (ST)

Results

476 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015

Key features

Comprehensive instruction set
Ladder diagram programming support
CIP and Modbus communication
Motion control capabilities
Various data types and manipulation instructions

Frequently asked questions

The Micro800 controllers support Ladder Diagram (LD), Structured Text (ST), and Function Block Diagram (FBD).

The controllers support CIP and Modbus communication protocols.

Yes, the Micro800 controllers have built-in motion control capabilities.

The instruction set includes arithmetic, Boolean, communication, compare, counter, data conversion, data manipulation, high-speed counter, input/output, interrupt, motion control, process control, program control, PID, real-time clock, and string manipulation instructions.