Rockwell Automation 1395 Digital Reference Adapter Board - Manual (Page 41)

Chapter 5
Programming Parameters
5-16
Parameter 567 – [A > One/Two/Quad]
Parameter 517 – [B > One/Two/Quad]
Use : Sets the encoder interface counting system.
Programming Terminal units: None
Minimum Value: 0
Maximum Value: 4
Default Value: 4
Description: This parameter is used to setup the digital reference input
for the type of signal being supplied. The valid choices are:
1 = Single ended, one edge input, rising edge.
2 = Single edged, two edge input, rising and falling edge.
4 = Differential, Quad edge input, Rising and falling edges.
When using a single ended encoder, number 2 would be the choice.
However, if the encoder has a non-symmetrical duty cycle, the leading
and trailing edge information will cause erroneous counting of the
encoder pulses. As a result, the reference may exhibit steady state
oscillation between two values, for a constant value of encoder speed.
Parameter 568 – [A > Dig Mult Const]
Parameter 518 – [B > Dig Mult Coast]
Use : A constant value multiplier for digital reference
Programming Terminal units: None
Minimum Value: – 16000
Maximum Value: +16000
Default Value: 1000
Description: This parameter is a slow parameter which can be used to
apply a multiplier value against the digital reference input. The Digital
Mult Const value is divided by 1000 and then multiplied to the Digital
Reference Value. The Digital Multiplier Select Parameter (P569)
determines whether the multiplier value comes from this parameter or
the fast Digital Multiplier Constant Parameter (P453). The difference is
that this parameter is a slow parameter and the fast multiplier parameter
is a fast parameter. Default value of 1000 is unity gain.
Parameter 569 – [A > Dig Mult Sel]
Parameter 519 – [B > Dig Mult Sel]
Use : Selects which multiplier value applies to the digital reference
input.
Programming Terminal units: None
Minimum Value: 0
Maximum Value: 1
Default Value: 0
Description: This parameter is a slow parameter which selects which
multiplier value is applied to the digital reference input. When this
parameter is zero, the Slow Multiplier Parameter (P568) is used. When
this parameter is one, the fast parameter (P453) is applied to the digital
reference.