
6F3B0253
6. Programming Information
External input devices (X)
These devices (X) indicate the ON/OFF states of external input signals through the input circuits. External input devices can be used many times in a program.
External output devices (Y)
The external output devices (Y) store the ON/OFF signals that drive the external devices through the output circuits. They can be used for coils in a program.
External input registers (XW)
These (XW) are
External output registers (YW)
These
Auxiliary relay devices and registers (R/RW)
The auxiliary relay devices (R) are used to store intermediate results of sequences. The auxiliary relay registers (RW) are used to store temporary results of function instructions. The data in R/RW cannot be output directly to the output circuits. It is necessary to move the data to Y/YW.
It is possible to make these registers retentive so that they retain data in the event of a power failure. See section 5.3.
Timer devices and registers (T./T)
The timer registers (T) are used for storing the elapsed time of timer instructions, the
0.01 s base timers and 0.1 s base timers are provided.
Time base | |
0.01 s | T000 to T063 |
0.1 s | T064 to T255 |
The timer devices (T.) work as the output of the timer instructions.
It is possible to specify the T registers as retentive to retain their data in the event of a power failure. See section 5.3.
Basic Hardware and Function 77