DH Instruments PPC2+, Руководство пользователя

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PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc.
Page 114
VAC
Purpose Read or set the control ref status.
Command
Query
“VAC n”
“VAC?”
Classic “VAC= n”
“VAC”
Default “VAC 0”
Arguments n:
’0’ To disable auto mode and specify that the PPC2+ EXHAUST port
is open to atmosphere.
’1’ To disable auto mode and specify that the PPC2+ EXHAUST port
is connected to a vacuum source.
Remarks The PPC2+ has an internal sensor that determines if the exhaust port is open to
atmosphere or to a vacuum. You can manually override it if desired. The query can
also be used to see the sensor status (if auto is enabled). If the auto function is
disabled, then the query returns the last VAC setting.
Example
(enhanced)
Cmd sent:
Query reply:
“VAC 1”
“0”
“1”
Example
(classic)
Sent:
Query reply:
“VAC=1”
“VAC=0”
“VAC=1”
Errors ERR# 6: The argument is not a ‘0’ or a ‘1’.
See Also Section 3.3.1, “AUTOVAC”
VENT
Purpose Read, execute or abort a vent process.
Command
Query
“VENT n”
“VENT?”
Classic “VENT= n”
“VENT”
Arguments n:
’1’ to start a vent process.
’0’ to abort a vent process and close the exhaust valve.
Remarks The PPC2+ vents by generating close to atmosphere, and then opening the exhaust
valve. This program message query will return a ‘0’ if the exhaust valve is closed, or
a ‘1’ if the exhaust valve is open.
Example
(enhanced)
Cmd sent:
Query reply:
“VENT 1”
“0” (if not vented)
“1” (if vented)
Example
(classic)
Sent:
Reply:
“VENT=1”
“VENT=0” (if not vented)
“VENT=1” (if vented)
Errors ERR# 6: The argument is not a ‘0’ or a ‘1’.
See Also Section 3.1.2.2