MTS Series 793 Utility Software - Manual (Page 77)

Description Item
Encoder Properties Note:
The following settings only appear if Encoder was selected
from the Type menu.
Application Attribute: Not applicable
Mode : specifies the type of encoder used with this card: Gurley
(Teledyne), Incremental/Velocity, SSI (Temposonics R), PWM
(Temposonics G).
Debounce Filter: specifies the filtering applied to the input signal.
Debounce filtering is typically used clean up the shape of the pulse
in situations where there are long cable runs or signals with long rise
and fall times (for example, a proximity switch counting gear teeth)
with noise riding on the signal.
The default setting (40 ns) works for most applications.
Incremental/velocity encoder signals (especially single-ended counter
types) are somewhat more susceptible to noise. If the noise results
in extra counts, you may need a longer debounce time setting. If the
debounce setting is too long, the debounce filter will filter out the
encoder signal.
SSI (Temposonics R) /Gurley (Teledyne) encoders only:
Resolution (bits): this setting must match the number of bits in the
encoder’s data stream. Gurley=16 or 17 bits; SSI=1-32 bits.
Baud Rate: specifies the communications clock rate between the
processor and the encoder.
Type: specifies the type of encoding (Binary or Gray Scale) used by
the encoder.
Application Attribute: Not applicable Encoder icon
Type
For Incremental/Velocity and PWM (Temposonics G) encoders,
selections include Quadrature or Counter (single ended).
For SSI (Temposonics R) and Gurley (Teledyne) encoders, selections
include Signed or Unsigned.
For rotary devices, this setting is user preference. When “Turns
Counting” (see below) is enabled, the “Signed/Unsigned” setting only
affects the range of the initial reading at power up.
For linear devices, the “Signed/Unsigned” selection is based on the
behavior described below.
• Signed–the reading from the device represents both positive and
negative values. For example, -180 to +180 degrees for a rotary
device, -100mm to +100mm for a linear device.
• Unsigned–the reading from the device represents only positive
values. For example, 0 to 360 degrees for a rotary device, 0mm
to +200mm for a linear device.
MTS Series 793 Utility Software 63
HWI Hardware Settings