Analog Input Setup

 

The 9220 controller has three analog inputs. Each of the inputs comes with a factory default configuration dependent on the application It can be modified prior to shipment to your facility or in the field by a technician or qualified/trained person with the proper security code.

 

Analog Input Terminals

 

Analog Input 1 – terminals 31 and 32

Analog Input 2 – terminals 29 and 30

Analog Input 3 – terminals 27 and 28

 

Input Type:

The thermocouple type for most applications can be modified depending on your specific needs. Please note that in some applications, some of the inputs DO NOT allow the user to modify the Input type. To change the Input type, first select which input you want to change by selecting it in the pull-down menu just below the main menu list. Clicking on the Value will display an input box, and then you can use the pull-down menu to select the desired parameter.  Once selected, click OK and the displayed Input type under Value will be the current type. The following is a list of the options:

B            

C            

E            

J            

K            

N            

NNM     

R            

S

T

2.5 volts

1.25 volts

78.125 mV

19.53125 mV

4-20 mA *

25 volts **

12.5 volts **

781.25 mV

195.3125 mV

 

* - When the specified input type is selected, a 124 Ohm resistor will need to be placed on the terminals of specific input for reading this selection. If resistor is not placed on input terminals, then damage could occur to the board.

** - When the specified input type is selected, a jumper located inside the case will need to be placed on that specific input for reading this selection. If jumper is not placed on input, then damage could occur to the board.

 

Filter time:

The filter time is a factory applied averaging tool used to help maintain steady control in high EMI environments. The filter time should not be adjusted with consulting SSI.  Clicking on this value will display an input box from which the user can select a new value.  The range is 0 to 32767.

 

Initial Scale:

This is the initial scale value.  This could also be referred to as the starting value.  For example, the initial value is the value when 0 volts is on the selected input; or on a 4-20 mA input, it would be the value at the selected input of 4 mA.  Clicking on this value will display an input box from which the user can select a new value.  The range is –32768 to 32767.

 

Full scale:

This is the full scale value for the analog inputs.  This is preset for thermocouple types.  Clicking on this value will display an input box from which the user can select a new value.  The range is –32768 to 32767.

 

Decimal Point Location:

This is the decimal point location value.  Clicking on this value will display an input box from which the user can select a new value.  The range is 0 to 4.

 

Open TC:

This is the open TC value.  Clicking on this value will toggle between upscale (will display the maximum scale number), down scale (will display the minimum scale point), one trip point (will use the trip point 1), and two trip points (will use which ever trip point is enabled).

 

Input Offset:

The input offset value is algebraically added to the input value to adjust the input curve on read-out.  The range is –10 to 10.

 

Scaling:

This is the scaling value.  The options are: Linear Microns, Log Torr, or Auto Scale.

 

TRIP POINT EXPLANATION: Setting a trip point will force the value that the controller uses for calculations to a certain value as assigned by the operator. Once the Trip Point Setpoint is reached, the controller will begin reading the value as the Trip Point Force Value, regardless of what the actual value is inside the furnace. The Trip Point Direction allows the operator to choose whether the controller will alter its reading when the trip point is either above or below the setpoint.

 

Trip Point 1 Setpoint: This is the value at which the trip point will be activated, forcing the displayed value to the “force value” set below. This value must be something that the input can achieve.

 

Trip Point 1 Force Value: This is the value that the input will be forced to display when the trip point SP (set above) has been achieved.

 

Trip Point 1 Direction: This is the trip point 1 direction. Options are input above setpoint or input below setpoint.

 

If you choose input above SP then the PV for the selected input will need to transition above the Trip Point 1 SP value set above.

 

If you choose input below SP then the PV for the selected input will need to transition below the trip point SP value set above.

 

Example (when OPEN INPUT is set for 1 trip point):

 

In this example when this input's PV goes below 10 then the displayed value will be forced to ZERO. IF it cannot or does not go below 10 then the forced value will never happen.

 

Trip Point 2 Setpoint, Trip Point 2 Force Value, and Trip Point 2 Direction function identically to the above.

 

High Input Limit Setpoint:

This is the setpoint for the high input limit.  The range is –32768 to 32768.

 

High Input Limit Hysteresis:

This is the setpoint for the high input limit.  The range is –32768 to 32768.

 

Custom Curve:

This will allow the user to set the custom curve to use.  The options are: None, Curve 1 – Curve 3.