Rockwell Automation GMLC Reference Manual - Manual (Page 558)

Publication GMLC-5.2 - November 1999
521
5. Use the Control Settings block to re-enable the Software Overtravel
Checking data bit.
Encoder Noise Fault
Encoder_noise_fault is a logical (Boolean) variable which has values of:
• 1 (true) if encoder noise has been detected on the specified axis
• 0 (false) if not
Note: An Encoder is sometimes alternately referred to as a Transducer.
Thus, Encoder Noise Fault is sometimes referred to as Transducer
Noise Fault.
In the Tag Explorer, select both Axis System Variables and the desired
physical axis then select Encoder_noise_fault in the Tag Window.
When evaluated in an expression, the value of the Encoder_noise_fault
variable indicates whether encoder noise has been detected on the encoder
input for the axis. When Encoder_noise_fault = 1, Axis_fault = 1,
Axis_status = 7 if no other faults of higher priority are active on the axis,
and Global_fault = 1 if no other faults of higher priority are active on any
axis.
Encoder noise is a simultaneous transition on both encoder channels.
!
ATTENTION: Be careful to move the axis in the
direction opposite the previous move (i.e. away from
the overtravel condition). Movement in the wrong
direction may cause physical harm to materials,
machinery or to the operator.