Alpha Omega Instruments 800 Series User Manual

EXAMPLE COMMANDS
Below are the MODBUS registers for common settings. The complete list of registers
are located in Appendix K.
715
Current limit when the process is Below the Current limit Set
Point temperature setting.
Current limit Below
[IL`b]
714
Current limit when the process is Above the Current limit Set
Point temperature setting.
Current limit Above
[IL`A]
713Set Point temperature at which the Current limits are referenced.
This is only appropriate when the settings of [IL`A] and
[IL`b] are not identically set. If the process temperature goes
“A”bove this set point, then the [IL`A] current limit will be in
effect. If the process temperature goes “B”elow this set point,
then the [IL`b] current limit will be in effect.
Current limit Set
Point (temperature)
[ILSP]
606Digits after the decimal point. Use this to determine where to put
the decimal point after reading a register variable that returns a
temperature setting.
Example:
Read register 300 (“R300,1”) and get “9999” and reading register
606 yields a “2”. Therefore, the reading from register 300 is
really “99.99” with the decimal point 2 digits from the right.
Decimal Point
340,341Alarm 3 low & Alarm 3 high.
If the process temperature should go below A3lo the output will
be turned off.
If the process temperature should go above A3hi the output will
be turned off.
DO NOT turn off the Alarms by disabling the Out3 setting via
the front panel! Rather set the alarms outside the desired
temperature range to avoid an alarm and turning off the
output to the TEC.
Temperature Alarms
[a3lo] and
[a3hi]
510,511,513Heating parameters P,I,& D
Proportional Band 2
Integral Term 2
Derivative Term 2
When HEATING these parameters will determine the control
stability.
PID2
[Pb`2]
[It`2]
[dE`2]
500,501,503Cooling parameters P,I,& D
Proportional Band 1
Integral Term 1
Derivative Term 1
When COOLING these parameters will determine the control
stability.
PID1
[Pb`1]
[It`1]
[dE`1]
300Desired temperature
READ/WRITE. -1999 to 9999 limited to input range.
Set point
100Actual temperature
READ ONLY. -1999 to 9999 limited to input range. (i.e.
Thermistor 0 to 9999)
Process
Register(s)DescriptionName
ALPHA OMEGA INSTRUMENTS CORP. Instruction Manual
Series 800/850 Thermoelectric Cooler Controller Page 87

Alpha Omega Instruments 800 Series Specifications

General

Brand	Alpha Omega Instruments
Model	800 Series
Category	Controller
Language	English