Delta Tau Turbo PMAC PCI-Lite, Справочник по аппаратуре

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Turbo PMAC PCI Lite
Machine Connections 17
Only one pair of analog-to-digital converter registers is available to the PMAC processor at any given
time. The data appears to the processor at address Y:$78808. The data from the selected analog input 0
to 7 (ANAI00-ANAI07) appears in the low 12 bits; the data from the selected analog input 8 to 15
(ANAI08-ANAI15) appears in the high 12 bits (this data is only present if Option 12A has been ordered).
The input is selected and the conversion is started by writing to this same word address Y:$78808. A
value of 0 to 7 written into the low 12 bits selects the analog input channel of that number (ANAI00-
ANAI07) to be converted in unipolar mode (0V to +5V). A value of 0 to 7 written into the high 12 bits
selects the analog input channel numbered eight greater (ANAI08-ANAI15) in unipolar mode. If the
value written into either the low 12 bits or the high 12 bits is eight higher (8 to 15), the same input
channel is selected, but the conversion is in bipolar mode (-2.5V to +2.5V).
Turbo PMAC variables I5060 to 5096 allow an automatic conversion of the analog inputs. Setting
variables I5061 to I5076 to 8 the data can be read from registers Y:$3400 to Y:$341F. See the Turbo
PMAC Software Reference for further details on this.
Compare Equal Outputs Port (JEQU Port)
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 useful for scanning and measurement applications.
Instructions for use of these outputs are covered in detail in the PMAC’s User Manual.
Outputs can be configured sinking or sourcing by replacing the chip U37 and configuring the jumpers
E101-102. The voltage levels can be individually configured by removing resistor packs RP43 or RP56
and connecting an external pull-up resistor in each output to the desired voltage level.
Serial Port (JRS422 Port)
For serial communications, use a serial cable to connect the PC’s COM port to the PMAC’s J4 serial port
connector. Delta Tau provides the Acc-3D cable that connects the PMAC PCI to a DB-25 connector.
Standard DB-9-to-DB-25 or DB-25-to-DB-9 adapters may be needed for a particular setup. Jumper E110
selects between RS-232 or RS422 signals type for the J4 connector. If a cable needs to be made, use a
flat cable prepared with flat-cable type connectors as indicated in the following diagram: