Super Systems 9120 with TS - Manual (Page 15)

SSi 9120 Touchscreen Interface
4586 – 9120 With Touch Screen Interface Page 15 of 80
High Limit
This is the high limit field. Clicking on the value will allow the user to change the value. The
range is –100 to 100.
0 Setpoint Stops Control
If the Setpoint is zero, then all outputs are turned off. Clicking on the value will allow the user to
change the value. The option is either Yes or No.
IN1 high stops control
If input 1’s high limit is reached, then all outputs are turned off. The value can either be Yes or
No.
IN2 high stops control
If input 2’s high limit is reached, then all outputs are turned off. The value can either be Yes or
No.
IN3 high stops control
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 –500 to 4000.
Switch Point PID 2 -> 3
This is the PID Switch Point field. The range is –500 to 4000.
Overshoot Limit Gain
This is the Overshoot limit gain field. When calculating the control action sometimes the
calculation would call for more than 100%, which is not possible. The output is limited to 100%,
or whatever was set in the High Limit field. The difference of the unlimited minus the limited is
multiplied by the overshoot limit gain and divided by 100. This is subtracted from the control
output. If the gain is 0 there is no effect. Under normal control, the unlimited equals the limited
and there is no effect. If there is a big change where the control loop drives hard, then the effect
is to limit the drive as it approaches setpoint and limit the overshoot.
The limited is the values set in the upper and lower limits fields. The unlimited would be what is
calculated before limiting. For a big setpoint change, the calculations may compute 150%
output, but the true output is limited to the upper limit. The range is 0 to 9999.
Setpoint Lower Limit
This is the setpoint lower limit for the loop. The range is -500 to 4000.
Setpoint Upper Limit
This is the setpoint upper limit for the loop. The range is -500 to 4000.