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PRINCIPLE
PG9000 has four RS232 communications ports referred to as COM1, COM2, COM3 and
COM4 and a single IEEE-488 port. COM1 and the IEEE-488 port are for communicating with
a host computer (see Section 4). COM2 is for communicating with an external barometer
and/or vacuum gauge (see Section 3.12.5.4, 3.12.5.5), or for pass through commands to an
RS232 device.
COM3 is reserved for communications with an automated pressure
generation/control component, COM4 is not presently used and is reserved for future use.
The communication ports can be set up from the PG Terminal.
PG9000 provides a self-test for its RS232 communication ports.
verification that the PG9000 RS232 ports (COM1, COM2, COM3, COM4) are operating
properly and that a valid interface cable is being used. (see Section 3.12.5.3)
OPERATION
To access the port communications settings, press [SPECIAL] and select <5remote>.
Select <1COM1>, <2COM2>, <3COM3>, <4COM4> or <5IEEE-488> to view and edit that
port's communications settings (see Section 4.2.1 for information on COM port settings).
Selecting <2COM2> includes the choice to set up external barometer communications as
well as the port's communications settings. Select <1settings> to view and edit COM2
communications settings.
communications settings (see Section 3.12.5.4).
To access the RS232 self-test press [SPECIAL], <5remote>, <5RS232test>.
3.12.5.1 COM1, COM2, COM3 and COM4 (RS232)
The COM ports can be set for the specific settings required by the user.
The settings are baud rate, parity, data bits and stop bits. The available options
are found in Table 18. COM1, COM2, COM3 and COM4 Available Settings.
Table 18. COM1, COM2, COM3 and COM4 Available Settings
The default COMx settings are 2400, E, 7,1,
ports.
PG9000 appends a carriage return (<CR>) and a line feed (<LF>) or
to all messages that are sent out of the COM1 port to the host. It looks for a
carriage return to terminate incoming messages and ignores line feeds.
3.12.5.2 IEEE-488
The IEEE-488 port address can be defined from 1 to 31. The default address is 10.
PG9000 sends a line feed (<LF>) and asserts the EOI line at the end of all
transmitted messages. It looks for a line feed and/or assertion of the EOI line to
terminate incoming messages.
3.12.5.3 RS232 Self Test
The RS232 self-test is provided to check the PG9000 COM ports and the
interface cable independently of an external device or computer.
If there is difficulty communicating with PG9000 from a host computer using
RS232, the RS232 self test can help establish that the PG9000 COM1 port and
the interface cable are good.
Select <2baro> to view and edit external barometer
BAUD RATE
300, 600, 1 200, 2 400, 4 800, 9 600, 19 200
PARITY
NONE, ODD or EVEN
DATA BITS
7 or 8
STOP BITS
1 or 2
TERMINATORS
<CR><LF> or <LF><CR>
Page 107
3. GENERAL OPERATION
The self-test allows
for all COM
<CR><LF> or <LF><CR>
© 2011 Fluke Calibration
<LF><CR>
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