MelsecNet is a protocol developed and supported by
Mitsubishi Electric for data delivery. MelsecNet supports 239 networks.
MelsecNet protocol has two variants. MELSECNET/H and its predecessor MELSECNET/10 use high speed and redundant functionality to give deterministic delivery of large data volumes. Both variants can use either
coaxial
In geometry, coaxial means that several three-dimensional linear or planar forms share a common axis. The two-dimensional analog is ''concentric''.
Common examples:
A coaxial cable is a three-dimensional linear structure. It has a wire condu ...
bus type or optical loop type for transmission. Coaxial bus type uses the
token bus
Token bus is a network implementing a Token Ring protocol over a ''virtual ring'' on a coaxial cable. A token is passed around the network nodes and only the node possessing the token may transmit. If a node doesn't have anything to send, the t ...
method with overall distance of but optical loop type uses the
Token Ring
Token Ring network
IBM hermaphroditic connector with locking clip. Screen contacts are prominently visible, gold-plated signal contacts less so.
Token Ring is a computer networking technology used to build local area networks. It was introduc ...
method and can support a distance up to . MELSECNET/H can support a maximum of 19,200 bytes/frame and maximum communication speed of 25 Mbit/s. MELSECNET/10 supports 960 bytes/frame and a baud rate of 10 Mbit/s. Mitsubishi provides a manual for both the variants Melsecnet/H and MelsecNet/10.
manual
/ref>
Features
* Easy personal computer
A personal computer (PC) is a multi-purpose microcomputer whose size, capabilities, and price make it feasible for individual use. Personal computers are intended to be operated directly by an end user, rather than by a computer expert or tec ...
, HMI and PLC connection
* High-speed data communications with large data volumes
* Reliable and robust
Robustness is the property of being strong and healthy in constitution. When it is transposed into a system, it refers to the ability of tolerating perturbations that might affect the system’s functional body. In the same line ''robustness'' ca ...
data transfers
* Redundancy functions
* 10/25 megabaud
In telecommunication and electronics, baud (; symbol: Bd) is a common unit of measurement of symbol rate, which is one of the components that determine the speed of communication over a data channel.
It is the unit for symbol rate or modulatio ...
data transfer rates
* Maximum network distance 30 km, up to 255 segments
* Simple configuration, remote programming
* Floating master
References
External links
Mitsubishi Europe
Industrial computing
Serial buses
Industrial automation
Mitsubishi Electric products, services and standards
{{compu-network-stub