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Chapter 4 - Memory Link Communication 4.1 Setting Up memory Link Communication
4
Memory Link Communication
Read this chapter if you are using the LT unit with the memory link communications.
This chapter explains one-to-one communication between the LT unit and equipment such as a personal computer or a one-board microcomputer which do not
have their own protocols.
For information about the extended mode, refer to the GP70 SeReference
ries Memory Link Communication Protocol Manual.
4.1
Setting Up Memory Link Communication
Data transmission between the LT and Host (External Device) are run according to
the host's ladder logic program.
The LT runs its screen display relying on the host's data write commands, which
are based on the screen display's data send restrictions. And, the LT, following the
host's Reading command, passes stored data over to the host. Communication
occurs between the LT and host in this way, and normally, the initiative is held on
the host side. Data transmission between the LT and External Device is aided by
the memory area (System Area) prepared internally in the LT.
LogiTouch Editor Ver.1.0 External Device Connection Manual
4-1-1