Reference Manual

Turbo PMAC/PMAC2 Software Reference

Turbo PMAC On-line Command Specification 276

See Also:

Time-Base Control (Synchronizing Turbo PMAC to External Events)

I-Variables I10, Isx93, Isx94, Isx95

On-line commands %{constant}, H

%{constant}

Function: Set the addressed coordinate system's feedrate override value.

Scope: Coordinate-system specific

Syntax: %{constant}

where:

 {constant} is a non-negative floating point value specifying the desired feedrate override (time-

base) value (100 represents real-time)

This command specifies the feedrate override value for the currently addressed coordinate system. The

rate of change to this newly specified value is determined by coordinate system I-variable Isx94.

I-variable Isx93 for this coordinate system must be set to its default value (which tells to coordinate

system to take its time-base value from the % -command register) in order for this command to have any

effect.

The maximum % value that Turbo PMAC can implement is equal to (2

/I10)*100 or the (servo update

rate in kHz)*100. If a value greater than this is specified, Turbo PMAC will saturate at this value instead.

To control the time base based on a variable value, assign an M-variable (suggested Msx97) to the

commanded time base register (X:$002000, X:$002100, etc.), then assign a variable value to the M-

variable. The value assigned here should be equal to the desired % value times (I10/100).

Example:

%0 ; Command value of 0, stopping motion

%33.333 ; Command 1/3 of real-time speed

%100 ; Command real-time speed

%500 ; Command too high a value

% ; Request current value

225.88230574 ; Turbo PMAC responds; this is max allowed value

M5197->X:$002000,24,S ; Assign variable to C.S. 1 % command reg.

M5197=P1*I10/100 ; Equivalent to &1%(P1)