Super Systems 9120 with TS - Manual (Page 48)

SSi 9120 Touchscreen Interface
4586 – 9120 With Touch Screen Interface Page 48 of 80
Example: If a 12 mA output drives a 0 degree F temp. (PV) up to a 1200 degree F temp. (SP) this
would be REVERSE and since this would take a SINGLE output from the controller the Mode for
the Temperature Loop is Single Reverse.
Integral Preset
This field provides an offset for the starting point for PID control, also referred to as “Load Line”
or “Manual Reset”. The range is –100 to 100.
Cycle Time
This field is typically set to the valve travel time multiplied by 1.5. The range is 0 – 300.
Setpoint Change Limit
This is a smart time feature that allows Process Loop to use PB only without Reset until the
Process Variable drops below the percent output set under this category.
It is used to eliminate overshoot.
The Output percentage selected under this category
must be above the normal operating output
percentage of the furnace at heat.
Example – if the furnace runs at 40% output at heat for the maximum load, the setpoint change
limit should be set to 60%.
The options are: OFF, 80 %, 70 %, 60 %, 50 %, 40 %, 30 %, or 20 %.
Low Limit
This is the low limit field. The range is –100 to 100.
High Limit
This is the high limit field. The range is –100 to 100.
0 Setpoint Stops Control
If the Setpoint is zero, then all outputs are turned off. The option is either Yes or No.
IN1 high limit shuts down ctrl
If input 1’s high limit is reached, then all outputs are turned off. The value can either be Yes or
No.
IN2 high limit shuts down ctrl
If input 2’s high limit is reached, then all outputs are turned off. The value can either be Yes or
No.
IN3 high limit shuts down ctrl
If input 3’s high limit is reached, then all outputs are turned off. The value can either be Yes or
No.
PID Auto Switch
This is the PID auto switch field. The value can either be Yes or No.
Switch Point PID 1 -> 2
This is the PID Switch Point field. The range is –999 to 9999.