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AUBER INSTRUMENTS

4.5.3. Manual mode

Manual mode allows the user to control the output as a percentage of the

total heater power. It is like a dial on a stove. The output is independent of the

temperature sensor reading. One application example is controlling the

strength of boiling during beer brewing. You can use the manual mode to

control the boiling so that it will not boil over to make a mess. The manual

mode can be switched from PID mode but not from On/off mode. This

controller offers a "bumpless" switch from the PID to manual mode. If the

controller outputs 75% of power at PID mode, the controller will stay at 75%

when it is switched to the manual mode, until it is adjusted manually. See

Figure 3 for how to switch the display mode. The Manual control is initially

disabled (A/M=2). To activate the manual control, set A/M=0 or 1.

4.6 Cycle time "t"

It is the time period (in seconds) that the controller uses to calculate its

output. e.g. When t=2, if the controller decides output should be 10%, the

heater will be on 0.2 second and off 1.8 seconds for every 2 seconds. Smaller

t values result in more precision control. For SSR output, t is set at the

minimum (2 seconds). For relay or contactor output, it should be set longer to

prevent contacts from wearing out too soon. Normally it is set to 20~ 4 0

seconds.

4.7 Input selection code for "Sn"

Table 3. Code for Sn and its range.

Sn code

Input device

K (thermocouple)

S(thermocouple)

WRe (5/26) (thermocouple)

T (thermocouple)

E (thermocouple)

J (thermocouple)

B (thermocouple)

N (thermocouple)

Cu50 (RTD)

Pt100 (RTD)

0~80Ω

0~400Ω

0~20mV

0~100 mV

0~60 mV

0~1V

0.2~1V

4-20mA (w/ 50Ω Resistor)

1~5V

4~20mA (w/ 250Ω Resistor)

0~5V

-20~+20mV

-100~+100mV

-5V~+5V

4.8 Decimal point setting "dP"

1) In case of thermocouple or RTD input, dP is used to define temperature

display resolution.

dP=0, temperature display resolution is 1 ºC (ºF).

dP=1, temperature display resolution is 0.1 ºC . The 0.1 degree resolution is

only available for Celsius display. The temperature will be displayed at the

resolution of 0.1 ºC for input below 1000 ºC and 1 ºC for input over 1000 ºC.

2011.02

Display range (ºC) Display range (ºF)

-50~+1300

-58~2372

-50~+1700

-58~3092

0~2300

32~4172

-200~350

-328~662

0~800

32~1472

0~1000

32~1832

0~1800

32~3272

0~1300

32~2372

-50~+150

-58~302

-200~+600

-328~1112

-1999~+9999 Defined by user

with P-SL and P-SH

2) For linear input devices (voltage, current or resistance input, Sn=26-37)

Table 4. dP parameter setting

dP Value

Display format

0000

000.0

4.9 Limiting the control range, "P-SH" and "P-SL"

1) For temperature sensor input, the "P-SH" and "P-SL" values define the set

value range. P-SL is the low limit, and P-SH is the high limit.

e.g. Sometimes, you may want to limit the temperature setting range so that

the operator can't set a very high temperature by accident. If you set the P-

SL=100 and P-SH =130, operator will only be able to set the temperature

between 100 and 130.

2) For linear input devices, "P-SH" and "P-SL" are used to define the display

span. e.g. If the input is 0-5V. P-SL is the value to be displayed at 0V and P-

SH is the value at 5V.

4.10 Input offset "Pb"

Pb is used to set an input offset to compensate the error produced by the

sensor or input signal itself.

For example, if the controller displays 5 ºC when probe is in ice/water mixture,

setting Pb=-5, will make the controller display 0 ºC.

4.11 Output definition "OP-A"

This parameter is not used for this model. It should not be changed.

4.12 Output range limits "OUTL" and "OUTH"

OUTL and OUTH allow you set the output range low and high limit.

OUTL is a useful feature for a system that needs to have a minimum amount

of power as long as the controller is powered. e.g. If OUTL=20, the controller

will maintain a minimum of 20% power output even when input sensor failed.

OUTH can be used when you have an overpowered heater to control a small

subject. e.g. If you set the OUTH=50, the 5000 watt heater will be used as

2500W heater (50%) even when the PID wants to send 100% output.

4.13 Alarm output definition "AL-P"

Parameter "AL-P" may be configured in the range of 0 to 31. It is used to

define which alarms ("ALM1", "ALM2", "Hy-1" and "Hy-2") is output to AL1 or

AL2. Its function is determined by the following formula:

AL-P=AX1+BX2+CX4+DX8+EX16

If A=0, then AL2 is activated when Process high alarm occurs;

If A=1, then AL1 is activated when Process high alarm occurs;

If B=0, then AL2 is activated when Process low alarm occurs;

If B=1, then AL1 is activated when Process low alarm occurs;

If C=0, then AL2 is activated when Deviation high alarm occurs;

If C=1, then AL1 is activated when Deviation high alarm occurs;

If D=0, then AL2 is activated when Deviation low alarm occurs;

If D=1, then AL1 is activated when Deviation low alarm occurs;

If E=0, then alarm types, such as "ALM1" and "ALM2" will be displayed

alternatively in the lower display window when the alarms are on. This makes

it easier to determine which alarms are on.

If E=1, the alarm will not be displayed in the lower display window (except for

"orAL"). Generally this setting is used when the alarm output is used for

control purposes.

For example , in order to activate AL1 when a Process high alarm occurs,

trigger AL2 by a Process low alarm, Deviation high alarm, or Deviation low

alarm, and not show the alarm type in the lower display window, set A=1,

B=0, C=0, D=0, and E=1. Parameter "AL-P" should be configured to:

AL-P=1X1+0X2+0X4+0X8+1X16=17 (this is the factory default setting)

Note: Unlike controllers that can be set to only one alarm type (either

absolute or deviation but not both at same time), this controller allows both

alarm types to function simultaneously. If you only want one alarm type to

function, set the other alarm type parameters to maximum or minimum

(ALM1, Hy-1 and Hy-2 to 9999, ALM2 to –1999) to stop its function.

4.14 "COOL" for Celsius, Fahrenheit, Heating, and Cooling Selection

Parameter "COOL" is used to set the display unit, heating or cooling, and

alarm suppression. Its value is determined by the following formula:

COOL=AX1+BX2+CX8

A=0, reverse action control mode for heating control.

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