Specifications

Allen-Bradley ControlLogix Ethernet Driver Help

Syntax Data Type Access

R<file>:<element>.<field> Depends on field Depends on field

The following fields are allowed for each element. For the meaning of each field, refer to the PLC's documentation.

Element Field Data Type Access

LEN Word, Short Read/Write

POS Word, Short Read/Write

FD Boolean Read Only

IN Boolean Read Only

UL Boolean Read Only

ER Boolean Read Only

EM Boolean Read Only

DN Boolean Read Only

EU Boolean Read Only

EN Boolean Read Only

Ranges

PLC Model File Number Max. Element

MicroLogix 6, 9-999 999

SLC 500 Fixed I/O 6, 9-255 255

SLC 500 Modular I/O 6, 9-999 999

PLC-5 Series 3-999 1999

Examples

Example Description

R6:0.LEN Length field of control 0 file 6

R6:10.DN Done bit of control 10 file 6

R15:18.POS Position field of control 18 file 15

Integer Files

To access integer files, specify a file number, a word, and an optional bit in the word. The default data types are

shown in bold.

Syntax Data Type Access

N<file>:<word> Short, Word, BCD, DWord, Long, LBCD Read/Write

N<file>:<word> [rows][cols] Short, Word, BCD, DWord, Long, LBCD (array type) Read/Write

N<file>:<word> [cols] Short, Word, BCD, DWord, Long, LBCD (array type) Read/Write

N<file>:<word>/<bit> Boolean Read/Write

N<file>/bit Boolean Read/Write

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

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

Ranges

PLC Model File Number Max. Word

MicroLogix 7, 9-999 999

SLC 500 Fixed I/O 7, 9-255 255

SLC 500 Modular I/O 7, 9-999 999

PLC-5 Series 3-999 1999

The maximum word location is one less when accessing as a 32-bit data type (such as Long, DWord, or Long

BCD).

Examples

Example Description