Delta Tau PMAC2A-PC/104, Installation Manual

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PMAC2A-PC/104
Machine Connections 18
multiplexing port. This is selected by jumper E6 on the ACC-1P board and jumper E5 on the ACC-2P
board.
Alternatively, the inputs and outputs on this port may be used as discrete, non-multiplexed I/O. In this
case these I/O lines can be accessed through M-variables. See the
Software Setup section for details on
this.
ACC-2P Thumbwheel Multiplexer Port (JTHW Port)
The Thumbwheel Multiplexer Port, or Multiplexer Port, on the JTHW connector has sixteen lines. These
lines can be used to multiplex large numbers of inputs and outputs on the port, and Delta Tau provides
accessory boards and software structures (special M-variable definitions) to capitalize on this feature. Up
to 32 of the multiplexed I/O boards may be daisy-chained on the port, in any combination. Either the
ACC-1P or the ACC-2P boards, but not both, can use this connector as a multiplexing port. This is
selected by jumper E6 on the ACC-1P board and jumper E5 on the ACC-2P board.
Alternatively, the inputs and outputs on this port may be used as discrete, non-multiplexed I/O. In this
case these I/O lines can be accessed through M-variables. See the
Software Setup section for details on
this.
When used as non-multiplexed I/O jumpers E7 and E8 on the ACC-2P board select the I/O lines direction
of the JTHW connector. This allows configuring this port as all inputs, all outputs or half inputs and half
outputs. If E7 is removed or E8 is installed then the multiplexing feature if the JTHW port cannot be
used.
ACC-1P or ACC-2P Handwheel Port (JHW / PD Port)
This port provides an extra encoder input or a set of pulse and direction outputs. Jumpers E3 and E4 on
either the ACC-1P or ACC-2P boards select the function of this connector between encoder input or pulse
and direction outputs. The handwheel encoder input can be linked to a servomotor for manual
displacement or used by a motor as a secondary encoder for dual-feedback applications. There is no ‘C’
index channel input on the handwheel encoder port. The pulse and direction outputs can be used, for
example, to control an external laser device but not a stepper driver\motor, since this would require more
than eight axes of motion control.
Optional Analog Inputs
The optional analog-to-digital converter inputs are ordered either through Option-12 on the base board or
Option-2 on the axes expansion board. Each option provides two 12-bit analog inputs analog inputs with
a ±10 VDC range.
Compare Equal Outputs
The compare-equals (EQU) outputs have a dedicated use of providing a signal edge when an encoder
position reaches a pre-loaded value. This is very useful for scanning and measurement applications.
Instructions for use of these outputs are covered in detail in the PMAC2’s User Manual.
ADCIN_1
GND
JMACH1
45
3
±10 Volts analog signal
EQU_1+
GND
JMACH2
17
3
TTL level output