Specifications

Allen-Bradley ControlLogix Ethernet Driver Help

I:<slot>/<bit> Boolean Read Only

I:<slot>.<word>/<bit> Boolean Read Only

Ranges

PLC Model Min. Slot Max. Slot Max. Word

MicroLogix NA NA 2047

SLC 500 Fixed I/O NA NA 1

SLC 500 Modular I/O 1 30 *

PLC-5 Series NA NA 277 (octal)

*The number of Input or Output words available for each I/O module can be found in the SLC 500 Modular I/O

Selection Guide. For slot configuration help, refer to Device Setup.

Examples

MicroLogix Description

I:0 Word 0

I/2 Bit 2

I:1/5 Bit 5 word 1

SLC 500 Fixed I/O Description

I:0 Word 0

I:1 Word 1

I/16 bit 16

I:1/0 Bit 0 word 1 (same as I/16)

PLC5* Description

I:0 Word 0

I:10 Word 8 (10 octal = 8 decimal)

I/20 Bit 16 (20 octal = 16 decimal)

I:1/0 Bit 0 word 1 (same as I/20)

*Addresses are in Octal.

SLC 500 Modular I/O Description

I:1 Word 0 slot 1

I:1.0 Word 0 slot 1 (same as I:1)

I:12 Word 0 slot 12

I:12.2 Word 2 slot 12

I:4.0/0 Bit 0 word 0 slot 4

I:4/0 Bit 0 slot 4 (same as I:4.0/0)

I:4.2/0 Bit 0 word 2 slot 4

I:4/32 Bit 32 slot 4 (same as I:4.2/0)

Status Files

To access status files, specify a word and an optional bit in the word. The default data types are shown in bold.

Syntax Data Type Access

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

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

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

S:<word>/<bit> Boolean Read/Write

S/bit Boolean Read/Write

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

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

Ranges