Item reference syntax

Use item references to access data stored in memory registers in connected devices, as well as to access standard system items in the Communication Driver itself.

This section only describes the item reference syntax and options for the OMRONFINS server. For more general information about item references, see "Manage device items" and "Item reference descriptions" in the Communication Drivers Pack Help.

Item references in this Communication Driver use the following syntax.

For all multi-byte memory registers, use the following syntax:

<register type><address>@[data type]

<register type><address>[data suffix]

For bit-accessible memory registers — i.e., all types except PVC and PVT — use the following syntax:

<register type><address>:<bit>

<register type><address>.<bit>

For strings, use the following syntax:

<register type><starting address>-<register type><ending address>C

The following syntax diagram shows all of the possible options:

{ { CIO | A | H | W | D | EMarea }address (or starting address){ { @Short | S } | { @BCD | B } | { @Long | L } | @DWord | { @LBCD | M } | { @Float | F } | { : | . }bit | -{ CIO | A | H | W | D | EMarea }ending addressC } | { PVC | PVT }address (or starting address){ { @Short | S } | { | @Word | U } | { @BCD | B } | -{ PVC | PVT }ending addressC } }

where,

register type: The register type or memory area. For extended data memory (EM), the available areas include A through M.

address: The specific memory address on the device.

data type / data suffix: The formatted data type of the value read from the device memory. his parameter is optional; if the data type is not specified, the value will be formatted as Word (i.e., unsigned,16-bit decimal) by default.

Bit: The specific bit number in the memory address. Bit 0 is the low bit. Bit 15 is the high bit.

starting address, ending address: The starting and ending addresses of a string. Strings are stored as ASCII data. Each two-byte register contains two characters, and the string length can be from 1 to 40 registers (i.e., 2 to 80 characters).