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9102S
User's Guide
Interface Commands
Use the digital interface and commands shown in Table
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 3, 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.
Command Description
Display Temperature
Read current set-point
Set current set-point to n
Read temperature
Read temperature units
Set temperature units:
Set temperature units to Celsius
Set temperature units to Fahrenheit
Read scan mode
Set scan mode
Read scan rate
Set scan rate
Secondary Menu
Read proportional band setting
Set proportional band to n
Read heater power (duty cycle)
Configuration Menu
Operating Parameters Menu
Read High Limit
Set High Limit
Serial Interface Menu
Read serial sample setting
Set serial sampling setting to n seconds
Table 3. Controller Communications Commands
Command
Format
s[etpoint]
s
s[etpoint]=n
s=100 t=100
t[emperature]=n
t[emperature]
t
u[nits]
u
u[nits]=c/f
u[nits]=c
u=c
u[nits]=f
u=f
sc[an]
sc
sc[an]=on/off
sc=on
sr[ate]
sr
sr[ate]=n
sr=1.1
pr[op-band]
pr
pr[op-band]=n
pr=8.83
po[wer]
po
hl[imit]
hl
hl[imit]=n
hl=100
sa[mple]
sa
sa[mple]=n
sa=0
3
to access Product functions. These
Command
Returned
Example
set: 999.99 {C
or F}
t: 999.9 {C or F}
u: x
sc: {ON or OFF}
srat: 99.9 {C or F}/
min
pb: 999.99999
po: 999.9
hl: 9999
sa: 99999
Returned
Acceptable
Example
Values
set: 75.00 C
-10 to 122 °C
14 to 252 °F
t: 55.6 C
u: C
C or F
sc: ON
ON or OFF
srat:12.4 C/min
0.1 to 99.9 °C
0.2 to 179.8 °F
pb: 15.9
0.1 to 30 °C
0.2 to 54 °F
po: 6.5
hl: 125
50 to 125 °C
122 to 257 °F
sa: 1
0 to 10,000
22
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