DH Instruments PPCK PLUS, Руководство по эксплуатации и обслуживанию

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PPCK+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc .
Page 88
PASSTHRU
Purpose To allow the host PC to communicate with a device connected to the PPCK+
COM2 port.
Command
Query “PASSTHRU n
“PASSTHRU?”
Classic “PASSTHRU= n ”
“PASSTHRU”
Arguments n : The string to send out of the COM2 port. It must be less than
40 characters long.
Remarks This program message is a replacement for the ‘#’ program message which
is obsolete.
The PPCK+ COM2 port can be used to communicate to another RS232 device (such
as another PPCK+). This allows the user to use one COM port or IEEE-488 port on
the host computer to communicate with the PPCK+ and another device.
The command format specifies and sends the argument. A carriage return and a line
feed (
<CR><LF> ) are added to the string that is sent.
The Query format is used to check the PPC2 COM2 receive buffer to see if a
message has been received on COM2 from the device. This message received by
the COM2 port must be terminated with a carriage return or a carriage return and a
line feed. Only one message will be retained by the COM2 port. The label “COM2:”
will precede the message text. If the COM2 receive buffer is empty, then the reply
will just be ‘COM2:”
Example
(enhanced) Cmd sent:
Query reply:
Query reply: “PASSTHRU VER”
“COM2:DH INSTRUMENTS, INC PPCK+ VER1.01a”
“COM2:” If the COM2 buffer is empty
Example
(classic) Sent:
Reply:
Reply: “PASSTHRU=VER”
“COM2:DH INSTRUMENTS, INC PPCK+ VER1.01a”
“COM2:” If the COM2 buffer is empty
See Also “COM2”, “#”