DH Instruments PPC4, Руководство по эксплуатации и обслуживанию

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6. REMOTE OPERATION
Page 143 © 2009 DH Instruments, a Fluke Company
6.5.4 Program Message Descriptions
#
Purpose To allow the host PC to communicate with a device connected to the PPC4 COM2 port.
The preferred method is to use the “PASSTHRU” program message.
Classic “#xx”
Arguments xx: The string to send out of the COM2 port. It must be less than
40 characters long.
Remarks The PPC4 COM2 port can be used to communicate to another RS232 device (such as
another PPC4). This allows the user to use one COM port or IEEE-488 port on the host
computer to communicate with the PPC4 and another device. A carriage return and a
line feed (
<CR><LF> ) are added to the string.
After this program message is issued, the PPC4 will reply back the first string received
by the PPC4 COM2 port that is terminated with a carriage return. Line feeds are
discarded.
This will discontinue when the next program message is sent to the PPC4.
There is no other reply from this program message. Prior to using this program message,
you must ensure that the PPC4 COM2 port is correctly set up to communicate with the
device on COM2. Refer to the
“COM2=“ program message.
Example
(classic)
Sent:
Reply:
“#VER”
“DH INSTRUMENTS, INC PPC4 us A1000/A0015 Ver2.00 ”
This example assumes that a second PPC4’s COM1 port is connected to the PPC4
COM2 port. This example gets the version of the second PPC4.
See Also “PASSTHRU”, “COM2”
3.2.24
Note
COM2 is generally used for connecting DHI RPM4s to supply external
measurement devices in which case communications are handled
automatically by the PPC4.
ABORT
Purpose Stops active pressure generation/control. All control valves are closed. The exhaust and
transducer isolation valves are not affected.
Command
Classic
“ABORT”
“ABORT”
Remarks This program message has no effect if the PPC4 is not using automated pressure
control. When using automated pressure control, it aborts the control. This command is
recommended to idle the PPC4 before setting a new target pressure.
Example
(enhanced)
Cmd sent:
Reply:
“ABORT”
“ABORT” (no reply if IEEE-488)
Example
(enhanced)
Cmd sent:
Reply:
“ABORT?”
“ABORT”
Example
(classic)
Sent:
Reply:
“ABORT”
“ABORT”
See Also 3.2.12, 3.2.2