Omron DR 170 14 manual Item Name General Format, PnS, Pnb or Pnbb or Pn.b or Pn.bb, Pn-PhS

Klinkmann Automation Omron Ethernet DAServer 32

CHAPTER 4

Item Names

The Omron Ethernet DAServer supports item/point names consistent with the point naming conventions used by OMRON PLCs and programming software. The Server supports almost all memory areas of the following OMRON PLC types: CS1, CJ1, C200HX, C200HG, C200HE, CV-series, C-series, CPM2x and CQM1.

Contents

•Item Name General Format

•OMRON PLC’s Item Naming

•DAServer Standard System Items

•Generic OPC Syntax

Item Name General Format

In this section the general Item naming conventions used by OMRON Ethernet DAServer are explained.

Each Integer, Discrete or Floating Point item generally may be described as:

PnS

Each item, representing bit in word, may be described as:

Pn:b (or Pn:bb or Pn.b or Pn.bb)

Each ASCII string item generally may be described as:

Pn-PhS

where:

n - specifies the Memory area word/bit address of the specific word, flag or bit or lowest-numbered address of ASCII string.

b (bb) - specifies the bit number in word (b can be 0…9 and bb can be 00…15). Number of digits in bit item name with separator is not relevant (leading zeroes are not necessary).

h - Specifies the highest -numbered address of ASCII string.

P - optionally used prefix, one, two or three characters before Memory area address, and designates the type of Memory area.

S - optionally used suffix - a letter after address, which is used to change the default format of data. The following presents the OMRON Ethernet DAServer supported data formats and suffixes, indicating corresponding format.

Unsigned/Signed Format

The server interprets 16-bit word in a PLC in 16-bit unsigned format (value limits 0 to 65535) or signed format (value limits -32768 to 32767). Unsigned quantities may be read by one of two methods - by entering item name without suffix or appending the suffix 'U' (or 'u') to the item name. For example, channel DM100 in a PLC

Omron Ethernet DAServer Ver 1.x User Manual Rev 1.3 17014m13