Supported registers

The source of truth is the embedded catalog in src/device_ranges.rs plus the address parser in src/address.rs.

Word device families

Device	Category	Default type	Notes
DM	Word	U	Data memory. XYM profiles expose alias D.
EM	Word	U	Extended data memory. Not supported on every model. XYM profiles expose alias E.
FM	Word	U	File memory. Not supported on every model. XYM profiles expose alias F.
ZF	File refresh	U	File register range. Not supported on every model.
W	Word	U	Hex-numbered word device.
TM	Word	U	Temporary memory word device.
CM	Word	U	Control memory.
VM	Word	U	Variable memory. Not supported on KV-X500 profiles.
Z	Index	D	Native 32-bit index register.
T, TC, TS	Timer/counter	D	Timer-related values. T is in the range catalog; TC and TS are accepted as input addresses.
C, CC, CS	Timer/counter	D	Counter-related values. C is in the range catalog; CC and CS are accepted as input addresses.
AT	Timer/counter	D	Digital trimmer values on KV-3000, KV-5000, KV-7000, and KV-8000 profiles.

Bit device families

Device	Category	Notation	Notes
R	Bit	Decimal bank plus two decimal bit digits	Standard relay row.
B	Bit	Hexadecimal	Bit device with hexadecimal numbering.
MR	Bit	Decimal bank plus two decimal bit digits	Internal relay row.
LR	Bit	Decimal bank plus two decimal bit digits	Latch relay row.
CR	Bit	Decimal bank plus two decimal bit digits	Control relay row.
VB	Bit	Hexadecimal	Bit device with hexadecimal numbering. Not supported on KV-X500 profiles.
X, Y	Bit alias	Decimal bank plus one hexadecimal bit digit	XYM aliases published under the R row.
M	Bit alias	Decimal	XYM alias published under the MR row.
L	Bit alias	Decimal	XYM alias published under the LR row.

Type suffixes

Form	Value kind	Notes
Plain	Device default	Direct bit devices return bools, word devices default to U, and native timer/counter devices default to D.
:U	Unsigned 16-bit	One word.
:S	Signed 16-bit	One word.
:D	Unsigned 32-bit	Two words for word devices; one native point for T, C, Z, and AT.
:L	Signed 32-bit	Two words for word devices; one native point for T, C, Z, and AT.
:F	32-bit float	Two words.
.n	Bit in word	One hexadecimal bit index from 0 through F.

Addressing notes

Topic	Rule
X and Y notation	Use decimal bank digits followed by one hex bit digit, such as X10F. Do not write the whole value as one decimal number like X275.
R, MR, LR, and CR notation	Use two decimal bit digits for the low bit position, such as R200, MR115, or CR7915. The low two digits must be 00 through 15.
AT restriction	AT exists only on KV-3000, KV-5000, KV-7000, and KV-8000 catalog profiles. It is not in the write-device table, so write helpers reject it.
Catalog-only rows	CTH and CTC appear in the range catalog but are not accepted by the current address parser.
Default port	Use Host Link port 8501 unless your PLC configuration says otherwise.

For numeric range bounds and XYM alias limits, see DEVICE_RANGES.md.