User manual

Glossary
33002479 06 07/2008 377
MAC Address Media Access Control address. The hardware address of a device. A MAC address
is assigned to an Ethernet TCP/IP module in the factory.
MBAP Modbus Application Protocol
MIB Management Information Base. Database that holds the configuration of a SNMP
enabled device.
Modbus A communication system that links Modicon controllers with intelligent terminals and
computers over common carrier or dedicated lines
MSTR A special master instruction that uses ladder logic to read and write controller
information.
NACK Negative acknowledgment indicating an error.
NDDS Network Data Delivery Services.
NetLink The logical name of a network.
network Interconnected devices sharing a common data path and protocol for
communication.
node An addressable device on a communications network.
NTP Network Time Protocol. A protocol used to synchronize the time of a client or server
to the time of another server or referenced source like a satellite receiver.
OIT / OID Object Information True / Object ID (identify OIT) Contain databases managing
SNMP (MIBs)
M
N
O