DMC-1000 Chapter 7 Application Programming • 117
MG "Interrupt occurred" Display message
ST XY Stops motion on X and Y axes
#LOOP;JP
#LOOP,@IN[1]=0
Loop until Interrupt cleared
JG 15000,10000 Specify new speeds
WT 300 Wait 300 milliseconds
BG XY Begin motion on X and Y axes
RI Return from Interrupt subroutine
Analog Inputs
The DMC-1000 provides seven analog inputs. The value of these inputs in volts may be read using
the @AN[n] function where n is the analog input 1 through 7. The resolution of the Analog-to-Digital
conversion is 12 bits. Analog inputs are useful for reading special sensors such as temperature,
tension or pressure.
The following examples show programs which cause the motor to follow an analog signal. The first
example is a point-to-point move. The second example shows a continuous move.
Example - Position Follower (Point-to-Point)
Objective - The motor must follow an analog signal. When the analog signal varies by 10V, motor
must move 10000 counts.
Method: Read the analog input and command X to move to that point.
Instruction Interpretation
#Points Label
SP 7000 Speed
AC 80000;DC 80000 Acceleration
#Loop
VP=@AN[1]*1000 Read and analog input, compute position
PA VP Command position
BGX Start motion
AMX After completion
JP #Loop Repeat
EN End
Example - Position Follower (Continuous Move)
Method: Read the analog input, compute the commanded position and the position error. Command
the motor to run at a speed in proportions to the position error.
Instruction Interpretation
#Cont Label
AC 80000;DC 80000 Acceleration rate
JG 0 Start job mode
BGX Start motion
#Loop
VP=@AN[1]*1000 Compute desired position
VE=VP-_TPX Find position error
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