Specifications

Glossary
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LSB
least significant bit, least significant byte. The part of a number, address, or field that
is written as the rightmost single value in conventional hexadecimal or binary
notation.
M
MAC address
media access control address. A 48-bit number, unique on a network, that is
programmed into each network card or device when it is manufactured.
mandatory module
When an Advantys STB I/O module is configured to be mandatory, it must be
present and healthy in the Island configuration for the Island to be operational. If a
mandatory module is inoperable or is removed from its location on the Island bus,
the Island goes to a pre-operational state. By default, all I/O modules are not
mandatory. You must use the Advantys Configuration Software to set this
parameter.
master/slave model
The direction of control in a network that implements the master/slave model is
always from the master to the slave devices.
Modbus
Modbus is an application layer messaging protocol. Modbus provides client and
server communications between devices connected on different types of buses or
networks. Modbus offers many services specified by function codes.
MOV
metal oxide varistor. A 2-electrode semiconductor device with a voltage-dependant
nonlinear resistance that drops markedly as the applied voltage is increased. It is
used to suppress transient voltage surges.
MSB
most significant bit, most significant byte. The part of a number, address, or field that
is written as the leftmost single value in conventional hexadecimal or binary notation.