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DMC-3425 Chapter 7 Application Programming• 141
Example- Output Port
Instruction Interpretation
OP6
Sets outputs 2 and 3 of output port to high. All other bits are 0. (2
1
+ 2
2
=
6)
OP0 Clears all bits of output port to zero
OP 255 Sets all bits of output port to one.
The output port is useful for setting relays or controlling external switches and events during a motion
sequence.
Example - Turn on output after move
Instruction Inter
p
retation
#OUTPUT Label
PR 2000 Position Command
BG Begin
AM After move
SB1 Set Output 1
WT 1000 Wait 1000 msec
CB1 Clear Output 1
EN End
Digital Inputs
The general digital inputs for are accessed by using the @IN[n] function or the TI command. The
@IN[n] function returns the logic level of the specified input, n.
Example - Using Inputs to control program flow
Instruction Interpretation
JP #A,@IN[1]=0 Jump to A if input 1 is low
JP #B,@IN[2]=1 Jump to B if input 2 is high
AI 7 Wait until input 7 is high
AI -6 Wait until input 6 is low
Example - Start Motion on Switch
Motor A must turn at 4000 counts/sec when the user flips a panel switch to on. When panel switch is
turned to off position, motor A must stop turning.
Solution: Connect panel switch to input 1 of DMC-3425. High on input 1 means switch is in on
position.
Instruction
Interpretation
#S;JG 4000 Set speed
AI 1;BGA Begin after input 1 goes high
AI -1;STA Stop after input 1 goes low
AMA;JP #S After motion, repeat
EN;