Rockwell Automation 20D PowerFlex 700S Drive Ph I Control, Frames 1...11 - Manual (Page 86)

3-32 Programming and Parameters
233 Encdr0 Config
Specifies the configuration options for the Encoder 0.
• Bits 0 [Enc Filt bt0], 1 [Enc Filt bt1], 2 [Enc Filt bt2], and 3 [Enc Filt bt3] configure the encoder input filter (see
Table 233A: Encoder Input Filter Settings ). The
filter requires the input signal to be stable for the specified time period. Input transitions within the filter time setting will be ignored.
• Bits 4 [Encdr 4x] and 5 [Encdr A Phs] determine how the encoder channel A and B signals will be interpreted. Typically, both encoder phases A and B are
used so that direction information is available. Par 230 [Encdr0 Position] counts up for forward rotation and down for reverse rotation. If bit 5 [Encdr A Phs] is
set, then the B phase signal is ignored. As a result, the encoder position will only increase, regardless of rotation direction. Bits 4 and 5 together also
determine the number of edges counted per encoder pulse (see
Table 233B: Multiplier and Direction Settings ). "4x" sampling counts both rise and fall of both
A and B encoder phases, hence 4 edges per pulse. In 4x mode, the encoder position will change by four times the encoder pulses per revolution (PPR)
rating per encoder revolution (e.g., it increments the value in Par 230 [Encdr0 Position] by 4096 for one revolution of a 1024 PPR encoder).
• Bit 6 [Encdr Dir] inverts the channel A input, thus reversing the direction of the feedback.
• Bit 9 [Edge Time] configures the method of sampling used by the VPL. Setting this bit chooses "Edge to Edge" sampling, while resetting this bit to zero
chooses "Simple Difference" sampling. "Simple Difference" sampling calculates speed by examining the difference between pulse counts over a fixed
sample time. "Edge to Edge" sampling adjusts the sample time to synchronize with the position count updates from the daughter card - improving the
accuracy of the speed calculation.
• Bits 12 [SmplRate bt0] through 15 [SmplRate bt3] configure the sample interval for measuring speed (see
Table 233C: Encoder Sample Interval Settings ).
Increasing the encoder sample interval improves speed measurement near zero speed. Decreasing allows the speed control regulator to perform with high
gains at high speeds.
234 Encdr0 Error
Indicates the error status of the Encoder 0.
235 Port0 Regis Ltch
Displays the registration data of port 0. Indicates the position reference counter value
latched by the external strobes. The strobe signal used to trigger the latch is configurable
by Par 236 [Port0 Regis Cnfg].
Default:
Min/Max: 0
-/+2147483648 32-bit
Integer
No.
Name
Description
Values Li
nkab
le
Read
-Wr
it
e
Da
ta
T
ype
Options
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
Res
er
ved
SmplRate bt3 SmplRate bt2 SmplRate bt1 SmplRate bt0 Res
er
ved
Res
er
ved
Edge
Time
Res
er
ved
Res
er
ved
Enc
dr Dir
Enc
dr A Phs
Enc
dr 4x
Enc Filt
bt3
Enc Filt
bt2
Enc Filt
bt1
Enc Filt
bt0
Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 1 0 1 0
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 = False
1 = True
Table 233A: Encoder Input Filter Settings
Bit 3 2 1 0 Encoder Bit Filter Settings
0 0 0 0 Filter disabled
0 0 0 1 100 ns filter
0 0 1 0 200 ns filter
0 0 1 1 300 ns filter
0 1 0 0 400 ns filter
0 1 0 1 500 ns filter
0 1 1 0 600 ns filter
0 1 1 1 700 ns filter
1 0 0 0 800 ns filter (default setting)
1 0 0 1 900 ns filter
1 0 1 0 1000 ns filter
1 0 1 1 1100 ns filter
1 1 0 0 1200 ns filter
1 1 0 1 1300 ns filter
1 1 1 0 1400 ns filter
1 1 1 1 1500 ns filter
Table 233B: Multiplier and Direction Settings
Bit 5 4 Mult Directions Comments
0 0 2x fwd/rev Counts rise/fall of phase
A, phase B only used to
find direction
0 1 4x fwd/rev Counts rise/fall of both A
and B phases (default
setting)
1 0 1x fwd only Counts rise of phase A.
Phase B ignored.
1 1 2x fwd only Counts rise of phase A.
Phase B ignored.
Table 233C: Encoder Sample Interval Settin
Bit 15 14 13 12 Encoder Sample Interval
Settings
0 0 0 0 0.5 ms
0 0 0 1 0.5 ms (min. setting)
0 0 1 0 1.0 ms
0 0 1 1 1.5 ms
0 1 0 0 2.0 ms (default setting)
0 1 0 1 2.5 ms
0 1 1 0 3.0 ms
0 1 1 1 3.5 ms
1 0 0 0 4.0 ms
1 0 0 1 4.5 ms
1 0 1 0 5.0 ms
1 0 1 1 5.5 ms
1 1 0 0 6.0 ms (max. setting)
1 1 0 1 6.0 ms
1 1 1 0 6.0 ms
1 1 1 1 6.0 ms
Options
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Rese
rv
ed
Phas
e L
ev
el
Phas
e L
oss
Quad Los
s
Encd
r Mi
ssi
ng
Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 = False
1 = True