Galil DMC-3425 Manual De Usuario

FE ABCD 

Find Edge Routine.  This routine monitors the Home Input 

FI ABCD 

Find Index Routine - This routine monitors the Index Input 

HM ABCD 

Home Routine - This routine combines FE and FI as Described Above 

SC ABCD 

Stop Code 

TS ABCD 

Tell Status of Switches and Inputs 

_HMn 

Contains the value of the state of the Home Input 

_SCn 

Contains stop code 

_TSn 

Contains status of switches and inputs 

Often it is desirable to capture the position precisely for registration applications.  The DMC-3425 
provides a position latch feature.  This feature allows the position of the encoders of A or B axis to be 
captured when the latch input changes state.  This function can be setup such that the position is 
captured when the latch input goes high or low.  The inputs on these controllers are TTL.  Latch time 
latency on a high or low going signal is less than 1

μsec.  Each axis has one general input associated to 

the axis for position capture: 

IN1 

A Axis Latch 

IN2 

B Axis Latch 

The DMC-3425 software commands, AL and RL, are used to arm the latch and report the latched 
position.  The steps to use the latch are as follows: 

1.  Give the AL AB command to arm the latch. 

2.  Test to see if the latch has occurred (Input goes low) by testing the operand, _ALA or 

_ALB.  Example, V1=_ALA returns the state of the A latch into V1.  V1 is 1 if the latch 
has not occurred. 

3.  After the latch has occurred, read the captured position with the command RL AB or RL 

AB command or monitor the value of the operands _RLA and _RLB. 

NOTE:  The latch must be re-armed after each latching event.