114 • Chapter 7 Application Programming DMC-1000
Instruction Interpretation
V1=10 Assign V1
V1= Return V1
0000000010.0000 Response from controller with default format
V1={F4.2} Specify local format
0010.00 Response from controller with new format
V1={$4.2} Specify hex format
$000A.00 Response from controller in hexadecimal format
V1="ALPHA" Assign string "ALPHA" to V1
V1={S4} Specify string format first 4 characters
ALPH Response from controller in string format
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-1000 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 - converting to user units
Instruction Interpretation
#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
Programmable Hardware I/O
Digital Outputs
The DMC-1000 has an 8-bit uncommitted output port for controlling external events. The DMC-1080
has an additional eight output bits available at JD5 pins 10-17. 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).
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