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PLC Model

File Number

Max Element

Micrologix

5, 9-999

999

SLC 500 Fixed I/O

5, 9-255

255

SLC 500 Modular I/O

5, 9-999

999

PLC-5 Series

3-999

1999

Control files are a structured type whose data is accessed by specifying a file number, an element, and a field. The default data types are shown in bold.

78

UN

Boolean

Read Only

OV

Boolean

Read Only

DN

Boolean

Read Only

CD

Boolean

Read Only

CU

Boolean

Read Only

Examples Example C5:0.ACC C5:10.DN C15:0.PRE

Control Files

Description Accumulator of counter 0 file 5 Done bit of counter 10 file 5 Preset of counter 0 file 15

Allen-Bradley ControlLogix Ethernet Driver Help

Ranges

Elem

ent 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

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

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

Syntax R<file>:<element>.<field>

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.

Ranges

Data Type

Access

Depends on field

Depends on field

Examples Example R6:0.LEN R6:10.DN R15:18.POS

Integer Files

Description Length field of control 0 file 6 Done bit of control 10 file 6 Position field of control 18 file 15

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