SMAR MB-700, User Manual

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Glossary
IX
GLOSSARY
Address of a MODBUS Variable:
It refers to the address of the MODBUS variable read or written in an I/O block of a device.
Baud Rate:
Data transference rate in bits per second.
Bridge:
A bridge isolates two networks. It has the function of only passing the data addressed to it to the
other side. It works in the data link layer.
Bypass:
When the MODBUS message is received by the MB-700 it is passed to the other network where it is
connected.
CCCF:
Block that configures the communication between the MB-700 and slave devices.
CCCM:
Block to configure the peer-to-peer communication.
CCSM:
Block to configure the concentrator function of the MB-700.
CCDL:
Block that sets the Data Logger.
Communication Protocols:
They are rules to control the data communication. Protocol is the software that controls and grants
the communication, formats the way of sending data, defines the path, the sending and the
reception of data, check for transmission errors.
Configuration:
Establishes the functioning parameters for the device.
Data Concentrator:
The MB-700 is a data concentrator because it stores variables read from MODBUS slave devices in
its memory and makes them available to the supervision system and/or monitoring, avoiding these
systems needing to access slaves of the network directly.
Download:
It means in the MB-700 context, to send configuration or firmware to a device.
EIA-232/EIA-485:
Establish the standards for cable (physical connection) to serial communication.
Ethernet:
IEEE 802.3 Standard. It refers to the physical mean where it is installed the local network. The baud
rate may reach up to 10 Mbits/second.
Fast - Ethernet:
Operates at 100 Mbits/second and it is similar to the Ethernet. However, it is limited in 100 meters
by the distance between HUB and workstation.