Honeywell SMV800, User Manual

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Page viii SMV800 Modbus User's Guide Revision 1.0
Macrocycle The least common multiple of all the loop times on a given link.
mAdc Milliamperes Direct Current
Manufacturer's Signal
Processing A term used to describe signal processing in a device that is not defined by
Modbus specifications.
mmHg Millimeters of Mercury
Modbus
Modbus is an industry standard protocol used in many SCADA packages for
network control. The transmitters can be inserted into existing networks using
Modbus or linked directly to a controller over an RS485 link. Modbus TCP/IP is
available through the Ethernet interface.
mV Millivolts
MBT
Network Management
Meter Body Temperature
A part of the software and configuration data in a Foundation Modbus device
that handles the management of the network.
Network Management
Agent
Part of the device software that operates on network management objects.
Network Management
Information Base A collection of objects and parameters comprising configuration, performance
and fault-related information for the communication system of a device.
Nm Newton. Meters
NPT National Pipe Thread
NVM Non-Volatile Memory
Object Dictionary Definitions and descriptions of network visible objects of a device. There are
various object dictionaries within a device. The dictionaries contain objects and
their associated parameters which support the application in which they are
contained.
Objects Entities within the FBAP, such as blocks, alert objects, trend objects,
parameters, display lists, etc.
P Pressure
Pa Measured static pressure in PV4 algorithm
Parameters A value or variable which resides in block objects
Pc Absolute critical pressure of the gas
Pd Static pressure at downstream point
Pdp Measured differential pressure in Pascals in PV4 algorithm
Pf Absolute pressure of flowing gas
PM Process Manger
Pr Reduced pressure
PID Proportional Integral Derivative control. A standard control algorithm. Also,
refers to a PID function block.
PSI Pounds per Square Inch
PSIA Pounds per Square Inch Absolute
Pu Static pressure at upstream point
PV Process Variable
PWA Printed Wiring Assembly
PT Process Temperature
RFI Radio Frequency Interference
RTD Resistance Temperature Detector
Stack The software component that implement the Foundation Modbus
communications protocol specifications, including FMS, FAS, DLL, SM and NM.