Wiring for 1 Encoder
The following figure illustrates connections for one encoder to a 68-pin SCSI connector on a
DaqBoard/3000 Series board.
The “A” signal must be connected to an even-numbered channel and the associated
“B” signal must be connected to the next [higher] odd-numbered channel. For example,
if “A” were connected to CTR0, “B” would be connected to CTR1.
Encoder Connections to pins on the SCSI Connector*
* Connections can instead, be made to the associated screw-terminals of a connected TB-100 terminal
connector option.
In addition to the previous figure, the following table indicates how to connect a single encoder to a 3000
Series board. Each signal (A, B, Z) can be connected as a single-ended connection with respect to the
common ground. The encoder can draw power from the 3000 Series board’s +5 VDC power output
(pin 19). Connect the encoder’s power input to the +5V pin and connect the return to digital common
(GND) on the same connector.
The programming setup given below is just a representative of possible options.
Single Encoder – Programming Example Setup
SCSI Pin
Connects to:
Example Programming Setup
Pin 5
(CTR0)
Encoder – A
Encoder Mode, 4X option, 16-bit counter, Latch on SOS, Map channel
Clears the counter, set Map channel to CTR2.
Pin 39
(CTR 1)
Encoder – B
Period Mode, 1Xperiod option, 16-bit counter, Map channel doesn’t gate,
Ticksize to 208.3 ns.
Pin 4
(CTR2)
Encoder – Z Counter in Totalize mode, stop-at-the-top, 16-bit counter.
If the encoder stops rotating, but is vibrating [due to the machine it is mounted to], the debounce feature
can be used to eliminate false edges. An appropriate debounce time can be chosen and applied to each
encoder channel. Refer to the
Debounce Module
section on page 1 for additional information regarding
debounce times.
Relative position
and
velocity
can be obtained from the encoder. However, during an acquisition, data that
is relative to the Z-position cannot be obtained until the encoder locates the Z-reference.
During an acquisition, data that is relative to the Z-position cannot be obtained until the
encoder locates the Z-reference.
Note that the number of Z-reference crossings can be tabulated. If the encoder was turning in only one
direction, then the Z-reference crossings will equal the number of complete revolutions. This means that
the data streaming to the PC will be
relative position
,
period = 1/velocity
, and
revolutions
.
5-18 Counter Input Modes
918494
DaqBoard/3000 Series User’s Manual
Summary of Contents for OMB-DAQBOARD-3000 Series
Page 7: ...This product requires one of the following Operating Systems Windows 2000 Windows XP ...
Page 14: ...IG 8 DaqBoard Installation Guide 918494 1033 0940 rev 8 0 ...
Page 36: ...2 8 Connections Pinouts 918494 DaqBoard 3000 Series User s Manual ...
Page 40: ...4 2 Calibration 918494 DaqBoard 3000 Series User s Manual ...
Page 80: ...6 12 Setpoint Configuration for Output Control 908794 DaqBoard 3000 Series User s Manual ...
Page 102: ...DBK215 pg A 14 948894 Appendix A ...
Page 104: ...B 2 Hardware Analog Level Trigger 90794 Appendix B ...