TABLE OF CONTENTS Display page (F8) holds an auxiliary display with all variables necessary for process simulation and control. It also shows those control variables, normally not shown on real industrial control displays, that are helpful in the understanding of process control. This display shows variables such as simulation gain and values, noise gain and values, disturbance gain and values, special controller output and limit calculations, etc.
| OP | Controller output in % of range. |
| PV | Process variable in % of range. |
| SP | Setpoint in % of range. |
| CSP | Internal computed setpoint in % of range. |
| CVPD | CVPD is the increment value that occurs as a result of proportional and derivative control calculation. CVPD is used to increment (or decrement) all controller outputs by its value. |
| CVI | CVI is the increment value that occurs as a result of integral control calculation. CVI is used to increment (or decrement) all controller outputs by its value. |
| OPCALC | Status variable to define the type of OP-limit calculation. OPCALC can be set to the status VIRTUAL or REAL. VIRTUAL permits the internal output value (OPVIRT) to assume values beyond any OP-limit. The real output OP is then limited by OP-limits. Any internal controller calculation makes use of the virtual, internal and unlimited output value. This results in a saturated OP limit calculation. REAL causes both to be limited by OP-limits, the internal output value (OPVIRT) and the true OP. This results in a non-saturated OP limit calculation. |
| ACTION | Direction of output control action. ACTION... |
