9102S
User’s Guide
22
Interface Commands
Use the digital interface and commands shown in Table
to access Product functions. These
commands are used with the RS-232 serial interface. The commands are terminated with a carriage-
return character (CR, ASCII 13). The interface makes no distinction between upper and lower case
letters, so either may be used. Commands may be abbreviated to the minimum number of letters which
determines a unique command. A command may be used to either set a parameter or to show a
parameter depending on whether or not a value is sent with the command following a “=” character. For
example, “s” returns the current set-point and “s=120.0” sets the set-point to 120.0 degrees.
In the list of commands in Table
, characters or data within brackets, “[” and “]”, are optional for the
command. A slash, “/”, denotes alternate characters or data. Numeric data, denoted by “n”, may be
entered in decimal or exponential notation. Characters are shown in lower case although upper case
may be used. Spaces may be added within command strings and are simply ignored. Backspace (BS,
ASCII 8) may be used to erase the previous character. A terminating carriage return (CR, ASCII 13) is
implied with all commands.
Table 3. Controller Communications Commands
Command Description
Command
Format
Command
Example
Returned
Returned
Example
Acceptable
Values
Display Temperature
Read current set-point
s[etpoint]
s
set: 999.99 {C
or F}
set: 75.00 C
Set current set-point to n
s[etpoint]=n
t[emperature]=
n
s=100 t=100
-10 to 122 °C
14 to 252 °F
Read temperature
t[emperature]
t
t: 999.9 {C or F}
t: 55.6 C
Read temperature units
u[nits]
u
u: x
u: C
Set temperature units:
u[nits]=c/f
C or F
Set temperature units to Celsius
u[nits]=c
u=c
Set temperature units to Fahrenheit
u[nits]=f
u=f
Read scan mode
sc[an]
sc
sc: {ON or OFF}
sc: ON
Set scan mode
sc[an]=on/off
sc=on
ON or OFF
Read scan rate
sr[ate]
sr
srat: 99.9 {C or F}/
min
srat:12.4 C/min
Set scan rate
sr[ate]=n
sr=1.1
0.1 to 99.9 °C
0.2 to 179.8 °F
Secondary Menu
Read proportional band setting
pr[op-band]
pr
pb: 999.99999
pb: 15.9
Set proportional band to
n
pr[op-band]=n
pr=8.83
0.1 to 30 °C
0.2 to 54 °F
Read heater power (duty cycle)
po[wer]
po
po: 999.9
po: 6.5
Configuration Menu
Operating Parameters Menu
Read High Limit
hl[imit]
hl
hl: 9999
hl: 125
Set High Limit
hl[imit]=n
hl=100
50 to 125 °C
122 to 257 °F
Serial Interface Menu
Read serial sample setting
sa[mple]
sa
sa: 99999
sa: 1
Set serial sampling setting to
n
seconds sa[mple]=n
sa=0
0 to 10,000
