Specifications

Allen-Bradley ControlLogix Ethernet Driver Help

PLC-5 Series 3-999 1999

Note: Not all MicroLogix and SLC 500 PLC devices support ASCII file types. For more information, refer to the

PLC's documentation.

Examples

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

To access string files, specify a file number and an element. Strings are 82 character null terminated arrays. The

driver places the null terminator based on the string length returned by the PLC. The default data types are

shown in bold.

Note: Arrays are not supported for string files.

Syntax Data Type Access

ST<file>:<element>.<field> String Read/Write

Ranges

PLC Model File Number Max. Word

MicroLogix 9-999 999

SLC 500 Fixed I/O NA NA

SLC 500 Modular I/O 9-999 999

PLC-5 Series 3-999 999

Examples

Example Description

ST9:0 String 0

ST18:10 String 10

BCD Files

To access BCD files, specify a file number and a word. The default data types are shown in bold.

PLC-5 Syntax

Syntax Data Type Access

D<file>:<word> BCD, LBCD Read/Write

D<file>:<word> [rows][cols] BCD, LBCD (array type) Read/Write

D<file>:<word> [cols] BCD, LBCD (array type) Read/Write

The number of array elements (in bytes) cannot exceed the block request size specified. This means that array

size cannot exceed 16 BCD, given a block request size of 32 bytes.

Ranges

PLC Model File Number Max. Word

MicroLogix NA NA

SLC 500 Fixed I/O NA NA

SLC 500 Modular I/O NA NA

PLC-5 Series 3-999 999

Examples

Example Description

D9:0 word 0

D27:10 [16] 16 element array starting at word 10