DH Instruments PPC2 AF - Page 66

PPC2 AF OPERATION AND MAINTENANCE MANUAL
© 1998 DH Instruments, Inc. Page 60
COMN(=)
Purpose: Read or set the configuration of the COM1 or COM2 port.
Syntax: “COMn=baud,parity,data,stop”
“COMn”
Arguments: n: The COM port ‘1’ or ‘2’
baud: The baud rate. This may be ‘300’, ‘600’,’1200’,’2400’,’4800’, ‘9600’ or ‘19200’
parity: The data parity. This may be ‘O’ for odd, ‘E’ for even, or ‘N’ for none.
stop: The number of stop bits. This may be ‘1’ or ‘0’
Defaults: “COM1=2400,E,7,1”
“COM2=2400,E,7,1”
Remarks: The COM1 port is used to communicate to the PPC2 AF. When the COM1 port configuration of
the PPC2 is changed, the command reply will be sent at the old COM1 settings, but all
subsequent communications will be accomplished at the new COM1 settings. The COM2 port
can be used to communicate with additional devices.
Example: Command: “COM1=9600,N,8,1”
Reply: “9600,N,8,1”
Errors: ERR# 7: Missing or improper command argument(s)
See Also: 3.4.4.3
DATE(=)
Purpose: Read or set the PPC2 AF date.
Syntax: “DATE=yymmdd
“DATE”
Arguments: yymmdd: The date in the numerical only format year-month-day with no spaces.
Remarks: The PPC2 AF has an internal real time calendar clock. It is used for date stamping calibrations.
Example: Command: “DATE=960221”
Reply: “960221”
Errors: ERR# 7: Missing or improper command argument(s)
See Also: 3.4.4.4
DF=
Purpose: Decrease the pressure quickly.
Syntax:
“DF=n”
Arguments: ‘0’ Closes the fast down valves.
‘1’ Opens the fast down valves.
Remarks: Opening the fast down valves will cause the pressure to decrease quickly.
Example: Command: “DF=1”
Reply: “DF=1”
Errors:
ERR# 6:The n argument is a ‘0’ or a ‘1’
See Also: 1.2.7