Toshiba LC531 Series Instruction Manual page 174

Appendix E Details of Variables
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This chapter describes the configurations and roles of the following variables
in detail.
● System Variables (ZW)
Variables used to access internal information of the LC53*.
● Tag Variables (PV, LP , PB)
Variables used to access control information of the LC53*.
● Built-in I/O Variables (SIO1)
Variables used to access built-in I/Os of the LC53*.
● EC bus Variables (EC_BUS)
Variables equivalent to that of the conventional single-loop controllers
(EC*** series). Data of other single-loop controllers connected to EC bus can
be accessed by using EC bus variables.
● Inter-controller Transmission Variables (STN_DATA)
Variables used to refer to send and receive data of inter-controller
transmissions. They allow you to refer to data of other single-loop
controllers connected on the Ethernet and send data to other controllers.