Specifications

8 – Configuring Points

126 R400

Analog Point Parameters

An analog point can represent the following different types of field values:

• Process Variable (PV)

•Output (OP)

• Mode (MD)

• Setpoint (SP)

• Up to four auxiliary values (A1, A2, A3, A4)

Analog points represent continuous values such as pressures or temperatures.

Figure 8.4, “Analog Point Used to Represent a Temperature” on page 126 shows

the relationship between a field value and an analog point.

Analog Point Process Variable (PV)

The PV of an analog point represents the current “reading” (represented in

engineering units) of the field device or process. PVs are often used to represent

the process variable of a control loop.

Figure 8.4 Analog Point Used to Represent a Temperature

PID

SP PV OP MD

Pump

Valve

Flow Sensor

Server (Station Display) Controller Plant Equipment

plscpcg.book Page 126 Monday, May 28, 2001 10:11 AM