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Chapter 7 Application Programming • 138 USER MANUAL
{Fn.m} or {$n.m} following the variable name and the ‘=’ symbol. F specifies decimal and $ specifies
hexadecimal. n is the number of digits to the left of the decimal, and m is the number of digits to the
right of the decimal. For example:
Examples:
:V1=10 Assign V1
:V1= Return V1
0000000010.0000 Default Format
:V1={F4.2} Specify local format
0010.00 New format
:V1={$4.2} Specify hex format
$000A.00 Hex value
:V1="ALPHA" Assign string "ALPHA" to V1
:V1={S4} Specify string format first 4 characters
ALPH
The local format is also used with the MG* command.
Converting to User Units
Variables and arithmetic operations make it easy to input data in desired user units such as inches or
RPM.
The DMC-13X8 position parameters such as PR, PA and VP have units of quadrature counts. Speed
parameters such as SP, JG and VS have units of counts/sec. Acceleration parameters such as AC, DC,
VA and VD have units of counts/sec
2
. The controller interprets time in milliseconds.
All input parameters must be converted into these units. For example, an operator can be prompted to
input a number in revolutions. A program could be used such that the input number is converted into
counts by multiplying it by the number of counts/revolution.
Example:
#RUN Label
IN "ENTER # OF REVOLUTIONS",N1 Prompt for revs
PR N1*2000 Convert to counts
IN "ENTER SPEED IN RPM",S1 Prompt for RPMs
SP S1*2000/60 Convert to counts/sec
IN "ENTER ACCEL IN RAD/SEC2",A1 Prompt for ACCEL
AC A1*2000/(2*3.14) Convert to counts/sec2
BG Begin motion
EN End program
Hardware I/O
Digital Outputs
The DMC-13X8 has an 8-bit uncommitted output port for controlling external events. The DMC-
13x8 also has an additional 64 I/O (configured as inputs or outputs with CO command). Each bit on
the output port may be set and cleared with the software instructions SB (Set Bit) and CB(Clear Bit),
or OB (define output bit).