Emerson IEC 62591 Instruction Manual page 76

IEC 62591 Wireless Interface Instruction Manual (for ROC800-Series and FloBoss 107)
On-line Accomplished while connected (by a communications link) to the target device. For
example, "on-line configuration" refers to configuring a ROC800-Series unit while
connected to it, so that you can view the current parameter values and immediately
load new values.
Type of message protocol the ROC uses to communicate with the configuration
Opcode
software, as well as host computers with ROC driver software.
Operator Also LOI or Local Port; the serial EIA-232 (RS-232) port on the ROC through which
Interface local communications are established, typically for configuration software running on a
PC.
A meter that records the flow rate of gas through a pipeline. The flow rate is calculated
Orifice meter
from the pressure differential created by the fluid passing through an orifice of a
particular size and other parameters.
P, Q
Parameter A property of a point that typically can be configured or set. For example, the Point Tag
ID is a parameter of an Analog Input point. Parameters are normally edited by using
configuration software running on a PC.
PC Personal Computer.
Pf Flowing pressure.
P/DP Pressure/Differential Pressure.
PI Pulse Input.
PID Proportional, Integral, and Derivative control feedback action.
PIT Periodic Timer Interrupt.
PLC Programmable Logic Controller.
Point Software-oriented term for an I/O channel or some other function, such as a flow
calculation. Points are defined by a collection of parameters.
Point Number The physical location of an I/O point (module slot and channel) as installed in the ROC.
Defines the database point to be a specific type of point available to the system. The
Point Type
point type determines the basic functions of a point.
Preset Number value previously determined for a register.
PRI Primary PID control loop.
Protocol A set of standards that enables communication or file transfers between two
computers. Protocol parameters include baud rate, parity, data bits, stop bit, and the
type of duplex.
PSTN Public Switched Telephone Network.
PT Process Temperature.
PTT Push-to-Talk signal.
Pulse Transient variation of a signal whose value is normally constant.
Pulse Interface A module that provides line pressure, auxiliary pressure, and pulse counts to a ROC.
module
PV Process Variable or Process Value.
R
Rack A row of slots on a ROC into which I/O modules can be plugged. Racks are given a
letter to physically identify the location of an I/O channel (such as "A" for the first rack).
Built-in I/O channels are assigned a rack identifier of "A" while diagnostic I/O channels
are considered to be in "E" rack.
A-6 Glossary Revised June-2018