mensor PCS 400 - Command Reference

Command Reference
The following symbols will be used throughout this
section.
* = Mode of operation as specified below:
M = MEASURE
C = CONTROL
Q = NOT AVAILABLE
V = VENT
S = STANDBY
$ = Pressure units as specified below:
0 = in Hg
1 = mBar
2 = psi
3 = in H2O
4 = mm Hg
5 = kPa
6 = mTorr
7 = NOT AVAILABLE
8 = NOT AVAILABLE
9 = Current PCS 400 units (no change)
# = 1 byte of variable data
<LF> = Linefeed (ASCII 0A Hex)
<CR> = Carriage return (ASCII 0D Hex)
• = Space (ASCII 20 Hex)
. = ‘.’ (ASCII 2E Hex)
/ = ‘/’ (ASCII 2F Hex)
: = ‘:’ (ASCII 3A Hex)
; = ‘;’ (ASCII 3B Hex)
X = ‘X’ (ASCII 58 Hex)
Changing the Mode of Operations
Measure
Long Format (11 bytes):
1234 567891011
M$00 00000 0 X
Bytes 3–10 are ignored. Only numeric characters
(‘
.‘, ‘+’, ‘–’), are allowed.
Short Format (3 bytes):
123
M$X
The long and short formats place the PCS in the
MEASURE mode in the specified pressure units.
Mini Format (2 bytes):
12
MX
The mini format places the PCS in the MEASURE
mode in the current pressure units.
Control
Long format (11 bytes):
1234 567891011
C$## ##### # X
Byte 10 is ignored.
This command places the PCS in the CONTROL
mode in the pressure units specified at the pres-
sure specified.
Example: To command 5.2 inHg on a 40 inHg
unit, all of the following pressure strings (bytes
3–9) would be acceptable:
5.20000
005.200
00005.2
+0005.2
000+5.2
••5.2••
Note that the decimal point requires 1 bytes out
of seven. Also note that spaces (ASCII 20 Hex)
are allowed.
Short Format (4 to 10 bytes):
1234 5678910
C$## ##### X
With this format only the significant digits of the
pressure string are required. To command 5.2
inHg as above only ‘5.2’ is required, making the
total command string 6 bytes long.
Mini format (2 bytes):
12
CX
This command places the PCS into the CON-
TROL mode in the current pressure units at the
equivalent pressure in the current units to the
last commanded control pressure.
REMOTE OPERATION PCS 400
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