Wavelength Electronics LFI-3751, User Manual

Page: 83 / 132

Chapter 4 - Remote Interface Reference
Standard Command Code Listing
83
4
Alarm Status
Sensor Bias
Confi guration
MOD Gain
Confi guration
RUN/STOP
35
41
42
51
1
1 or 2
1 or 2
1 or 2
Command
Command
Type
Command
Code
Char 7 = Sign Char [+ always]
Char 6 = Sensor Open Error [0 = OK, 1 = Error]
Char 5 = Sensor Short Error [0 = OK, 1 = Error]
Char 4 = Low Temperature Limit [0 = OK, 1 = Error]
Char 3 = Decimal Point
Char 2 = High Temperature Limit [0 = OK, 1 = Error]
Char 1 = Current Limit [0 = OK, 1 = Error]
Char 0 = Output Status [0 = Output Off, 1 = Output On]
Char 7 = Sign Char [+ = manual, - = automatic]
Char 6 = NTC / PTC Sensor [0 = NTC, 1 = PTC]
Char 5 = AD590 [0 = OFF, 1 = use 10 k
Ω
resistor for feedback]
Char 4 = 10 mA [0 = OFF, 1 = use 10 mA bias current]
Char 3 = Decimal Point
Char 2 = 1 mA [0 = OFF, 1 = use 1 mA bias current]
Char 1 = 100
µ
A [0 = OFF, 1 = use 100
µ
A bias current]
Char 0 = 10
µ
A [0 = OFF, 1 = use 10
µ
A bias current]
Char 7 = Sign Char [+ = manual, - = automatic]
Char 6 = Not Used
Char 5 = Not Used
Char 4 = Not Used
Char 3 = Decimal Point
Char 2 = Mod Gain 3 (100 : 1) [0 = OFF, 1 = ON]
Char 1 = Mod Gain 2 (10 : 1) [0 = OFF, 1 = ON]
Char 0 = Mod Gain 1 (1 : 1) [0 = OFF, 1 = ON]
To Enable Output or Initiate Autotune: Write data is +XXX.XX1
To Disable Output or Abort Autotune: Write data is +XXX.XX0
Char 5 = Autotune Error Codes
1 = Zero Value Current Limit Error
2 = Current Limit Cannot reach SET T
3 = Non-uniform TE I step measured
4 = Rate Sign Change
Char 4 = Autotune Status [0 = Normal, 1 = Autotune]
Char 3 = Decimal Point
Char 2 = Temp Limit or Error Limit Status [1 = requires clearing]
Char 1 = Integrator Status [0 = OFF, 1 = ON]
Char 0 = Output Status [0 = OFF, 1 = ON]
Description and Data Field Range
To Set Sensor Bias,
enter ‘+’ in Char 7 with
settings in Char 6 - 0.
To Return to Auto
Sensor Bias Current,
enter ‘-’ in Char 7 or
turn off power.
To Set Analog Input
Gain (BNC on rear
panel), enter ‘+’ in
Char 7 with settings in
Char 2 - 0.
To Return to Auto
Analog Input Gain,
enter ‘-’ in Char 7 or
turn off power.