182 ● OV DMC-40x0 Command Reference
OV
FUNCTION: Off on encoder failure voltage
DESCRIPTION:
Sets the threshold voltage for detecting an encoder failure. The controller can detect a failure on
either or both channels of the encoder. This is accomplished by checking on whether motion
of at least 4 counts is detected whenever the torque exceeds a preset level (OV) for a specified
time (OT). Note that for this function to work properly it is necessary to have a non-zero
value for KI.
The default value for OV is approximately .95 volts. The value should be high enough to
guarantee that the motor would overcome any static friction. If it is too low, there will be
false triggering of the error condition. The OV value may not be higher than the TL value.
ARGUMENTS: OTn,n,n,n,n,n,n,n where
where n is a positive voltage between 0.001 and 9.9 volts.
? returns the last value set
USAGE: DEFAULTS:
While Moving Yes Default Value 0.9438
In a Program Yes Default Format 1.4
Command Line Yes
Controller Usage
ALL CONTROLLERS
OPERAND USAGE:
_OVn contains the OV value for the specified axis.
RELATED COMMANDS:
OA Off on encoder failure
OV Off on encoder failure voltage
EXAMPLES:
OTX=10 Set time to 10 milliseconds
OVX=5 Set voltage to 5
OAX=1 Enable encoder detection feature
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