PCS 200 Emulation
The PCS 200 was the predecessor to the PCS 400.It
was the first Mensor product sold with both GPIB
and RS-232 capabilities. There are hundreds of
these instruments in operation and it is expected
that the PCS 400 will be used as a replacement for
the older model in some instances. Therefore, the
PCS 400 has a built-in PCS 200 emulation command
set. Before incorporating a PCS 400 into a process
using PCS 200 commands the user must insure that
the PCS 400 is responding appropriately to each
command sent. Be aware that there are some PCS
200 commands which are meaningless to the PCS
400 because of basic differences in the types of
instruments, and that there may be other com-
mands not yet enabled in the PCS 400.
The intent with the PCS 400 design is that it will
recognize which syntax is being sent, and respond
appropriately to each individual message as it is
received. The remainder of the GPIB information
in this section contains PCS 200 information that is
considered valid for the PCS 400 at this time.
Command Set
The PCS 200 command syntax uses the following:
1. Capital letters represent the exact character
transmitted.
2. The following are valid substitutions for the
pressure units character ‘$’:
0inHg
1 mBar
2 psi
3inH2
4mmHg
5 kPa
6 mTorr
7 counts (not supported)
8 feet (not supported)
9 current units (no change)
3. The groups of ‘n’ characters represent nu-
meric input. The number of ‘n’s represent the
number of characters expected. These char-
acters can include the following: ‘0’, ‘1’, ‘2’,
‘3’, ‘4’, ‘5’, ‘6’, ‘7’, ‘8’, ‘9’, ‘
.‘, ‘–’, ‘+’, and a space.
(Note: Some PCS 200 command strings will
allow fewer than the specified number of nu-
meric characters to be entered. The PCS 400
will provide similar support.)
4. The ‘s’ character is a place holder for the
special function character. This character is
ignored by the instrument except when the
first character of the command string is an ‘F’.
Valid ‘F’ command strings are listed on the
next page.
5. PCS 200 emulation commands terminate on
the ‘X’. The EOI may be sent with 11 character
command strings, but is required in com-
mand strings with fewer than 11 characters.
Carriage returns and linefeeds are not neces-
sary or allowed.
REMOTE OPERATION PCS 400
4-10 www.mensor.com
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