Chapter 1 Overview - Mitsubishi MELSEC L Series User Manual

CHAPTER 1
The following describes the built-in Ethernet function of the CPU module.
(1) Connection of programming tools and GOTs (
• By using a hub, the CPU module can be connected to multiple programming tools and GOTs.
Up to 16 external devices can be connected to a single CPU module at the same time.
• When CPU modules and a programming tool are connected to the same hub, these CPU modules can be
searched from the programming tool. Displayed search results include IP addresses so that any of them can
be specified.
• MELSOFT connection allows access through routers in an environment such as a corporate LAN.
(2) Direct connection to a programming tool (simple connection)
( Page 28, CHAPTER 4)
The CPU module can be directly connected to a programming tool with a single Ethernet cable only, without using
a hub (simple connection).
For direct connection, the IP address and host name need not be specified in the transfer setup.
(3) MC protocol communication (
From an external device such as a personal computer or HMI, device data of the CPU module can be read or
written, and this allows CPU module operation monitoring, data analysis, and production control.
(4) Socket communication function (
By using instructions dedicated to socket communication, any data can be transferred from and to the external
devices connected through Ethernet using TCP or UDP.
(5) Time setting function (SNTP client) (
• Automatic time setting of the CPU module can reduce the maintenance cost for time setting.
• Because the same time information is shared among the CPU modules on Ethernet, in which order the
problems have occurred will be clear, resulting in fast and easy problem resolution.
• Since the automatic time setting is enabled upon power-on of the CPU module, operations can be started
based on accurate clock data.
(6) File transfer function (FTP) (
Each of the files stored in the CPU module can be read or written from the interfacing device with the FTP client
function, and a large amount of data can be easily transferred.
(7) Remote password (
Remote password setting can prevent unauthorized access from the outside and enhance the security of the
system.
16
OVERVIEW
Page 31, CHAPTER 5)
Page 38, CHAPTER 6)
Page 88, CHAPTER 8)
Page 107, CHAPTER 9)
Page 20, CHAPTER 3)
Page 85, CHAPTER 7)