4. REMOTE OPERATION
Page 59 © 1998 DH Instruments, Inc.
4.3.3 COMMAND SUMMARY
#
Purpose: To allow the host PC to communicate with a device connected to the PPC2 AF COM2 port.
Syntax: “#xx”
Arguments: xx: The string to send out of the COM2 port. It must be less than 40 characters
long.
Remarks: The PPC2 AF COM2 port can be used to communicate to another RS-232 device (such as
another PPC2 AF). This allows the user to use one COM port or IEEE port on the host computer
to communicate with the PPC2 AF and another device. A carriage return and a line feed
(<CR><LF>) are added to the string.
After this command is issued, the PPC2 AF will reply back the first string received by the
PPC2 AF COM2 port that is terminated with a carriage return. Line feeds are discarded. This will
discontinue when the next command is sent to the PPC2 AF.
There is no reply from this command other than this. Prior to using this command, you must
ensure that the PPC2 AF COM2 port is correctly set up to communicate with the device. Refer to
the “COM2=“ command.
This assumes that a second PPC2 AF’s COM1 port is connected to the PPC2 AF COM2 port.
This example gets the version of the second PPC2 AF:
Example: Command: “#VER”
Reply: “DH INSTRUMENTS, INC PPC2 AF VER1.00”
See Also: None.
ABORT
Purpose: Stops an active pressure generation. All control valves are closed. The exhaust and transducer
valves are not affected.
Remarks: This command has no affect if the PPC2 AF is not generating or holding a pressure. Otherwise,
it will cancel the current generation or hold cycle.
Example: Command: “ABORT”
Reply: “ABORT”
See Also: None.
ATM
Purpose: Reads the current internal ambient pressure.
Syntax: “ATM”
Arguments:
Remarks: The atmospheric pressure will be returned in the current pressure units (always absolute). This
measurement is followed by the units.
Example: Command: “ATM”
See Also: 3.4.4.7
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