|
| Prop ortiona l |
|
| |
|
| Ba nd 1 |
|
|
|
) |
| Prop ortiona l |
| ||
(% |
|
| |||
|
| Ba nd 2 |
| ||
OutputPower | Outp ut 1 |
| Outp ut 2 | ||
Outp ut 2 |
|
|
| Outp ut 1 | |
|
|
|
| ||
|
| Ove rla p | Process Variable | ||
|
|
| |||
|
| (p ositive va lue ) |
| ||
|
| Prop ortiona l |
| Prop ortiona l | |
|
| Ba nd 1 |
| ||
) |
|
| Ba nd 2 | ||
(% | Outp ut 1 |
|
| ||
|
|
| Outp ut 2 | ||
Power |
|
|
|
| |
|
|
|
|
| |
Output | Outp ut 2 |
|
|
| Outp ut 1 |
|
|
|
|
| |
|
|
|
|
| Process Variable |
|
| De a d b a nd |
| ||
|
| (ne g a tive va lue ) |
| ||
|
| Prop ortiona l |
|
| |
|
| Ba nd 1 |
|
|
|
(%) | Outp ut 1 |
| Prop ortiona l Ba nd 2 = 0 | ||
OutputPower |
|
| Output 2OFF | Output 2ON | Outp ut 2 |
Outp ut 2 |
| Outp ut 1 | |||
|
|
|
|
| Process Variable |
| ON/OFF Diffe re ntia l |
|
|
| |
| Positive va lue s | Ne g a tive va lue s | |||
|
| Ove rla p /De a d b a nd |
| ||
Figure 2-1 Proportional Band and Overlap/Deadband
Volume II |
