DH Instruments PPC2+, Manual

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PPC2+™ Operation and Maintenance Manual
Page 85
©2001 DH Instruments, Inc.
4.4.4 PROGRAM MESSAGE DESCRIPTIONS
#
Purpose To allow the host PC to communicate with a device connected to the PPC2+ COM2
port. This program message is obsolete. You should instead use the “PASSTHRU”
program message. This command is not available when using the enhanced
command format. Instead, use the “PASSTHRU” command.
Classic “#xx”
Arguments xx: The string to send out of the COM2 port. It must be less than
40 characters long.
Remarks The PPC2+ COM2 port can be used to communicate to another RS-232 device
(such as another PPC2+). This allows the user to use one COM port or IEEE-488
port on the host computer to communicate with the PPC2+ and another device.
A carriage return and a line feed (<CR><LF>) are added to the string.
After this program message is issued, the PPC2+ will reply back the first string
received by the PPC2+ 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 PPC2+.
There is no other reply from this program message. Prior to using this program
message, you must ensure that the PPC2+ 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 PPC2+ us A1000/A0015 Ver2.00 ”
This example assumes that a second PPC2+’s COM1 port is connected to the
PPC2+ COM2 port. This example gets the version of the second PPC2+.
See Also “PASSTHRU”, “COM2”
abort
Purpose Stops an active pressure generation. 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 PPC2+ is not using automated pressure
control. When using automated pressure control, it will abort the control.
Example
(enhanced)
Cmd sent:
Reply:
“ABORT”
“ABORT” (no reply if IEEE-488)
Example
(classic)
Sent:
Reply:
“ABORT”
“ABORT”
See Also Sections 3.2.3, 3.1.2.3