rotork Modbus IQ Pro Technical Manual page 6

Modbus MFU Option Card Installation Manual
Glossary of Terms:
Address
Fieldbus
Field Unit
Master/Slave
Modbus
Modbus RTU
Node
RS-485
Segment
Abbreviations:
ACTCON
CRC
DV
ESD
IEC
MFU
MV
NIC
PCB
PLC
RAM
ROM
RTU
SIL
SW
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The unique address for a node on the fieldbus, range 1-247.
The digital, two-way, multi-drop communication links.
The Modbus option card fitted to the actuator
The method of communication used by the Modbus Module. The
fieldbus requires a Modbus master to control the data exchange on
the highway.
The communication protocol used for data exchange.
The version of the protocol available from the Rotork module.
A single device on the fieldbus.
The electrical properties of the data highway as defined by the IEC
standard, copper conductors, 2 wire twisted pair.
A section of an RS-485 fieldbus that is terminated in its characteristic
impedance. Each Segment can include up to 32 devices.
Actuator Control (Register).
Cyclic Redundancy Check (error detection).
Desired Value.
Emergency Shut Down.
International Electrotechnical Commission.
Modbus Field Unit.
Measured Value.
Network Interface Card.
Printed Circuit Board.
Programmable Logic Controller.
Random Access Memory.
Read Only Memory.
Remote Terminal Unit.
Safety Integrity Level
Software.
Publication PUB091-003-00_0119