Toshiba 6F3B0253 External input devices, External output devices Y, External input registers XW

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 16-bit registers for storing values, which are received from the input circuits.

External output registers (YW)

These 16-bit registers (YW) are used for storing values, which are sent to the output circuits.

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 on-delay (TON), off-delay (TOF) and single-shot (SS) timers.

0.01 s base timers and 0.1 s base timers are provided.

Time base	T1-16S
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