Supported PLC Registers

This page is the canonical public register table for the Python high-level API.

Supported Bit Devices

Family	Kind	Example	Numbering
SM	bit	SM400	decimal
X	bit	X20	hexadecimal
Y	bit	Y20	hexadecimal
M	bit	M1000	decimal
L	bit	L100	decimal
F	bit	F10	decimal
V	bit	V10	decimal
B	bit	B20	hexadecimal
TS	bit	TS10	decimal
TC	bit	TC10	decimal
STS	bit	STS10	decimal
STC	bit	STC10	decimal
CS	bit	CS10	decimal
CC	bit	CC10	decimal
SB	bit	SB20	hexadecimal
DX	bit	DX20	hexadecimal
DY	bit	DY20	hexadecimal

Supported Word Devices

Family	Kind	Example	Numbering
SD	word	SD100	decimal
D	word	D100	decimal
W	word	W20	hexadecimal
TN	word	TN10	decimal
LTN	word	LTN10	decimal
STN	word	STN10	decimal
LSTN	word	LSTN10	decimal
CN	word	CN10	decimal
LCN	word	LCN10	decimal
SW	word	SW20	hexadecimal
Z	word	Z10	decimal
R	word	R100	decimal
ZR	word	ZR100	decimal
RD	word	RD100	decimal

High-Level Views

Form	Example	Meaning
plain word	D100	unsigned 16-bit word
signed view	D100:S	signed 16-bit value
dword view	D200:D	unsigned 32-bit value
long view	D300:L	signed 32-bit value
float view	D200:F	float32 value
bit in word	D50.3	one bit inside a word

Addressing Notes

• Start with D for the first smoke test.
• X, Y, B, W, SB, SW, DX, and DY use hexadecimal device numbers.
• Most other families use decimal numbers.
• .bit is valid only on word devices such as D50.3.
• LTN, LSTN, and LCN default to 32-bit current-value access in the public high-level helpers.

Not Currently in the Public Surface

• LTS
• LTC
• LSTS
• LSTC
• LCS
• LCC
• LZ
• G
• HG

If a family is not listed above, do not treat it as publicly supported by the current high-level API.