Galil DMC-1400 OC

DMC-1400 Series Command Reference OC ● 149

FUNCTION: Output Compare

DESCRIPTION:

The OC command allows the generation of output pulses based on one of the main encoder

positions. For circular compare, the output is a low-going pulse with a duration of

approximately 600 nanoseconds and is available at the output compare signal (labeled

CMP/ICOM on the ICM-1460). For a one shot compare, the output goes low until OC is

called again.

This function cannot be used with any axis configured for a step motor and the auxiliary

encoder of the corresponding axis cannot be used while using this function.

Note: The OC function requires that the main encoder and auxiliary encoders be configured

exactly the same (see the command, CE). For example: CE 0, CE 5, CE 10, CE 15.

Note: If the ICM-1460 has the –Opto Input option, the output compare is not brought out to

the CMP/ICOM terminal. If the output compare is to be used, the pin will need to be

accessed directly from the 37 Pin-D cable.

ARGUMENTS: OCX = m, n where

m = Absolute position for first pulse. Integer between -2⋅ 109 and 2 ⋅ 109

n = Incremental distance between pulses. Integer between -65535 and 65535, 0 for one shot

OCx = 0 will disable the Circular Compare function.

The sign of the parameter, n, will designate the expected direction of motion for the output

compare function. When moving in the opposite direction, output compare pulses will

occur at the incremental distance of 65536-|n| where |n| is the absolute value of n.

Note: When changing to CEx=2, if the original command was OCx=m,n and the starting

position was _TPx, the new command is OCx=2*_TPx-m,-n. For pulses to occur under

CEx=2, the following conditions must be met:

m>_TPx and n>0 for negative moves (e.g. JGx=-1000)

m<_TPx and n<0 for positive moves (e.g. JGx=1000)

USAGE:

While Moving Yes Default Value -

In a Program Yes Default Format -

Command Line Yes

Controller Usage DMC-1415/1416

OPERAND USAGE:

_OCx contains the state of the OC function

_OCx = 0 : OC function has been enabled but not generated any pulses.

_OCx = 1: OC function not enables or has generated the first output pulse.

EXAMPLES:

OCX=300,100 Select X encoder as position sensor. First pulse at 300. Following pulses

at 400, 500…