Specifications

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Allen-Bradley DH+/DH-485 Device Driver Help

All SLC Family PLCs do not support ASCII file types. Refer to PLC documentation.

Example

Description

A9:0

Character 0 (high byte of word 0)

A27:10 [80]

80 character array starting at character 10

A15:0 [4] [16]

4 by 16 character array starting at character 0

A62:0/32

32 character string starting at word offset 0

String Files

You can access data in a string file by specifying a file number and an element. The only data type allowed is string,

which are 82 character null terminated arrays. The driver places the null terminator based on the string length returned

by the PLC.

Syntax

Data Type

ST<file>:<element>

String

Note: Arrays of strings are not supported.

The following file numbers and maximum word locations are allowed for each model.

PLC Model

File Number

Max Word

SLC Family

9-999

999

PLC-5 Family

3-999

999

Example

Description

ST9:0

string 0

ST18:10

string 10

SLC Family Open Addressing

Open Addressing

The actual number of addresses available depends on the model of the PLC being used. The ranges have been opened

up to allow for maximum flexibility with future models. If, at runtime, the driver finds that an address is not present in

the device, the driver will post an error message and remove the tag from its scan list.

Note: This model has no model specific addressing.