GE Valve Software Tools MN-Valvue-FF-IOM Service Manual Page 199

  • Download
  • Add to my manuals
  • Print
  • Page
    / 244
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 198
183
A
Glossary
0xf7 See hexadecimal. This is the number 247 represented in hexadecimal nota-
tion. The 0x preamble indicates hexadecimal notation.
1.#INF This is the representation of infinity as expressed in IEEE 754 floating point
arithmetic. It is used in fieldbus devices to set a parameter to a value that
does not interfere with operation, such as for a limit, for example.
Actuator
Type
The HART Communications Foundation classifies a positioner as type Actu-
ator. This means that it receives a 4-20 mA control current signal and causes
an actuation function. A device of type Actuator may not be connected to a
circuit intended for a device of type Transmitter.
Algorithm A set of rules that control the operation of an object through software. The
FVP position control algorithm is a modified PID. Other algorithms embed-
ded in FVP include the STOPS method for calibrating stroke, and the auto-
TUNE method for establishing the best parameters for the PID algorithm.
AO Analog
Output
Block
This block processes signal from control blocks to make them compatible
with the control valve and passes them to the positioner's transducer block.
ATC
(Air-to-
Close)
The combination of a single acting actuator and the control valve where the
valve is closed when air pressure is applied to the actuator. A spring opens
the valve when air pressure is removed.
ATO
(Air-to-
Open)
The combination of a single acting actuator and the control valve where the
valve is open when air pressure is applied to the actuator. A spring closes
the valve when air pressure is removed.
AUTO Automatic mode
Basic
Device
This is any device not having the capability to control communications on an
H1 fieldbus segment.
Capabilitie
s File
This describes the communication objects in a fieldbus device. A configura-
tion device can use Device Description (DD) Files and Capabilities Files to
configure a fieldbus system without having the fieldbus devices online.
Page view 198
1 2 ... 194 195 196 197 198 199 200 201 202 203 204 ... 243 244

Comments to this Manuals

No comments