Supported registers

These device families and ranges come from the node source validation layer.

Word device families

Family	Address range	Number base	Notes
`DM`	`0..65534`	Decimal	Data memory.
`EM`	`0..65534`	Decimal	Expansion data memory.
`FM`	`0..32767`	Decimal	File memory.
`ZF`	`0..524287`	Decimal	Large file memory.
`W`	`0..7FFF`	Hex	Link register word.
`TM`	`0..511`	Decimal	Timer monitor word.
`Z`	`1..12`	Decimal	Index register.
`T`	`0..3999`	Decimal	Timer preset/current composite.
`TC`	`0..3999`	Decimal	Timer current/contact family.
`TS`	`0..3999`	Decimal	Timer current/contact family.
`C`	`0..3999`	Decimal	Counter preset/current composite.
`CC`	`0..3999`	Decimal	Counter current/contact family.
`CS`	`0..3999`	Decimal	Counter current/contact family.
`AT`	`0..7`	Decimal	Digital trimmer values; read only in the high-level write helpers.
`CM`	`0..7599`	Decimal	Control memory.
`VM`	`0..589823`	Decimal	Variable memory.
`D`	`0..65534`	Decimal	XYM-style word alias.
`E`	`0..65534`	Decimal	XYM-style word alias.
`F`	`0..32767`	Decimal	XYM-style word alias.

Bit device families

Family	Address range	Number base	Notes
`R`	`0..199915`	Decimal bit-bank	Lower two digits must be `00..15`.
`B`	`0..7FFF`	Hex	Bit family.
`MR`	`0..399915`	Decimal bit-bank	Lower two digits must be `00..15`.
`LR`	`0..99915`	Decimal bit-bank	Lower two digits must be `00..15`.
`CR`	`0..7915`	Decimal bit-bank	Lower two digits must be `00..15`.
`VB`	`0..F9FF`	Hex	Bit family.
`X`	`0..1999F`	Decimal bank plus hex bit	Input bit.
`Y`	`0..1999F`	Decimal bank plus hex bit	Output bit.
`M`	`0..63999`	Decimal	XYM-style internal relay alias.
`L`	`0..15999`	Decimal	XYM-style latch relay alias.

Address syntax

Form	Example	Meaning
Default word	`DM100`	Read/write using the default format for the device family.
Signed word	`DM100:S`	Signed 16-bit value.
Unsigned dword	`DM120:D`	Unsigned 32-bit value.
Signed long	`DM130:L`	Signed 32-bit value.
Float	`DM140:F`	32-bit floating point value.
Hex	`DM140:H`	Hexadecimal word text.
Comment	`DM145:COMMENT`	Read device comment text.
Bit in word	`DM150.3`	Bit 3 in `DM150`.
Count	`DM160,4`	Four consecutive values.
Direct bit count	`R200,4`	Four consecutive direct bits.
Timer	`T10`	Timer preset value.
Counter	`C10`	Counter preset value.

Addressing notes

X and Y use decimal bank plus hexadecimal bit notation. Use X10F, not X275.

R, MR, LR, and CR use two-digit bit notation inside a decimal bank. Use R200, not a hex-only form.

AT is validated for reads but rejected by the high-level write helpers before sending because it is not listed in the Host Link WR/WRS device table.

Counts are limited by the Host Link command rules. Most families allow up to 1000 values, or 500 for 32-bit formats. TM allows up to 512 values, or 256 for 32-bit formats. Z allows up to 12, AT allows up to 8, and timer/counter families allow up to 120.

See PLC profiles for supported connection profiles.