
6F3B0253
6. Programming Information
6.1 Devices and registers
The
Devices are used to store the ON/OFF information of contacts and coils, and registers are used to store
Devices are divided into six types:
XExternal input devices
YExternal output devices
RAuxiliary relay devices
SSpecial devices
T.Timer devices
C. Counter devices
Registers are divided into eight types:
XW | External input registers |
YW | External output registers |
RW | Auxiliary relay registers |
SW | Special registers |
TTimer registers
C Counter registers
D Data registers I, J, K Index registers
Device and register numbers
X devices share the same memory area as XW registers. Device X004, for example, represents the number 4 bit in the XW00 register.
| Bit position / Number |
(MSB) | (LSB) |
F E D C B A 9 8 7 6 5 4 3 2 1 0
XW00
1
X004
Thus, "X004 is ON" means that bit number 4 of XW00 is 1. Y, R, and S devices work in a similar manner.
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