DH Instruments PPC4, Operation And Maintenance Manual

Page: 159 / 228

6. REMOTE OPERATION
Page 147 © 2009 DH Instruments, a Fluke Company
COM1
Purpose Read or set the RS232 settings for the COM1 port.
Command
Query
“COM1 baud, parity, data, stop ”
“COM1?”
Classic “COM1= baud, parity, data, stop ”
“COM1”
Arguments Baud: The baud rate. This may be ’2400’,’4800’, ‘9600’ or ‘19200’.
Parity: The data parity. This may be ‘O’ for odd, ‘E’ for even, or ‘N’ for none.
Data:
The number of data bits. This may be ‘7’ or ‘8’.
Stop: The number of stop bits. This may be ‘1’ or ‘2’.
Defaults “COM1 2400,E,7,1”
Remarks The COM1 port is used to communicate to the PPC4. When the COM1 port configuration of
the PPC4 is changed, the program message reply (COM1 use only) is sent at the old COM1
settings, but all subsequent communications are accomplished at the new COM1 settings.
A 200ms or longer delay after receiving the reply to this command will ensure that the PPC4
has changed the COM port settings and is ready for communications at the new settings.
Example
(enhanced)
Cmd sent:
Query reply:
“COM1 9600,N,8,1”
“9600,N,8,1” (No reply if IEEE-488)
Example
(enhanced)
Cmd sent:
Query reply:
“COM1? 9600,N,8,1”
“9600,N,8,1”
Example
(classic))
Sent:
Reply:
“COM1=9600,N,8,1”
“9600,N,8,1”
Errors ERR# 7: Missing or improper program message argument(s).
See Also “PASSTHRU”
3.2.24
COM2
Purpose Read or set the RS232 settings for the COM2 port.
Command
Query
“COM2 baud,parity,data,stop ”
“COM2?”
Classic “COM2= baud,parity,data,stop ”
“COM2”
Arguments baud : The baud rate. This may be ’2400’,’4800’, ‘9600’ or ‘19200’.
parity : The data parity. This may be ‘O’ for odd, ‘E’ for even, or ‘N’ for none.
Data: The number of data bits. This may be ‘7’ or ‘8’.
stop :
The number of stop bits. This may be ‘1’ or ‘2’.
Defaults “COM2 2400,E,7,1”
Remarks COM2 is generally used to connect DHI RPM4 external measurement devices. The COM2
port can also be used to allow the host computer to communicate through the PPC4 to an
additional device connected to COM2. This can be useful if the host computer does not have
2 serial ports available.
Example
(enhanced)
Cmd sent:
Query reply:
“COM2 9600,N,8,1”
“9600,N,8,1” (No reply if IEEE-488)
Example
(enhanced)
Cmd sent:
Query reply:
“COM2? 9600,N,8,1”
“9600,N,8,1”
Example
(classic)
Sent:
Reply:
“COM2=9600,N,8,1”
“9600,N,8,1”
Errors ERR# 7: Missing or improper program message argument(s).
See Also “#”, “PASSTHRU”
3.2.24