Item names using the Modicon PLC register addresses

400001

When no spaces and no letters follow the register number, the register contents are treated as a 16-bit unsigned quantity.

400001 S

When a space and the letter "S" follow the register number, the register contents are treated as a 16-bit signed quantity.

400001 I

When a space and the letter "I" follow the register number, the register contents are treated as a 32-bit signed quantity.
This takes up two consecutive registers.

400001 L

When a space and the letter "L" follow the register number, the register contents are treated as a 32-bit signed quantity.
This takes up two consecutive registers.

400001 F

When a space and the letter "F" follow the register number, the register contents are treated as a floating-point quantity.
This takes up two consecutive registers.

400001 U

When a space and the letter "U" follow the register number, the register contents are treated as a 32-bit unsigned quantity.
This takes up two consecutive registers.

400001 LF

When a space and the letter "LF", follows the register number, the register contents are treated as a 64-bit floating-point quantity. This takes up four consecutive registers.

400001 LL

When a space and the letter "LL", follows the register number, the register contents are treated as a 64-bit signed quantity. This takes up four consecutive registers.

400001 UL

When a space and the letter "UL", follows the register number, the register contents are treated as a 64-bit unsigned quantity. This takes up four consecutive registers.

400001-400003 M

When a space and the letter "M" follow the register number or register number pair separated by a dash, the register contents are treated as ASCII data.
Each register contains up to two (2) ASCII characters.
This example represents six (6) ASCII characters.

300001:10

When a colon and a number from 1 (one) to 16 follow the register number, the register contents are treated as discrete data.
This example represents bit 10 of the input register 300001.