Digital Control System.

DeltaV Console Services ✘ Distributed Control System ✘ Direct Cascade Sequencing ✘ Differential Concentration Switch ✔ Digital Control System ✔

no terminating resistors are necessary ✘ speed is not affected by traffic ✘ it is a wireless network standard ✘ it is fully deterministic ✔ it is robust and inexpensive ✔

the analog signal range ✘ how determined the designer was ✘ the number of active bits ✘ the speed of analog signal sampling ✔ the probability of hardware failure. ✔

power monitoring ✘ error detection ✘ symmetry generation ✘ diagnostic monitoring ✔ diagnostic monitoring ✔

Representing single switch status ✘ Representing power supply voltage ✘ Counting discrete events ✘ Trigonometric math operations ✔ Exponential math operations ✔

Single-ended voltage signaling, multidrop ✘ Frequency Shift Key (FSK) signaling, superimposed on analog 4-20 Ma ✘ Manchester encoding, multidrop ✘ Mark-and-space signaling, point-to-point ✔ Differential voltage signaling, multipoint ✔

It has always been the leading fieldbus standard ✘ Data communication is entirely deterministic ✘ Power and data share the same wires ✘ Diagnostic data is communicated as well as process data ✔ Control algorithms may reside in the field devices ✔

To interrupt normal program flow and address an immediate need ✘ To check for errors in data communications ✘ To provide time delays for critical functions ✘ To monitor the operation of the microprocessor ✔ To signal the start of a new program cycle ✔

Speed ✘ Diagnostics ✘ User-friendliness ✘ Flexibility ✔ Noise immunity ✔

To save energy (compared to other control systems) ✘ To control a potentially dangerous process ✘ To increase response speed for fast processes ✘ To save money (compared to other control systems) ✔ To minimize routine maintenance requirements ✔