Function Files; Chapter 3 Function Files Overview - Allen-Bradley MicroLogix 1400 Instruction Manual

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Function Files

Overview
Function Files
File
File Name
Identifier
High-Speed Counter
HSC
Extended Pulse Train
PTOX
Output
Extended Pulse Width
PWMX
Modulation
Selectable Timed Interrupt
STI
Event Input Interrupt
EII
Real-Time Clock
RTC
Memory Module
MMI
Information
Base Hardware Information
BHI
Communications Status
CS0
File for Channel 0
Communications Status
CS2
File for Channel 2
I/O Status File
IOS
Ethernet Status File for
ES1
Channel 1
LCD Information File LCD
Publication 1766-RM001A-EN-P - October 2008
Function Files are one of the three primary file structures within the
MicroLogix 1400 controller (Program Files and Data Files are the others).
Function Files provide an efficient and logical interface to controller
resources. Controller resources are resident (permanent) features such as
the Real-Time Clock and High-Speed Counter. The features are available
to the control program through either instructions that are dedicated to a
specific function file, or via standard instructions such as MOV and ADD.
The Function File types are:
File Description
This file type is associated with the High-Speed Counter function. See Using the
High-Speed Counter and Programmable Limit Switch on page 99 for more information.
This file type is associated with the Pulse Train Output Instruction. See Pulse Train Outputs
(PTOX) Function File on page 143 for more information.
This file type is associated with the Pulse Width Modulation instruction. See Pulse Width
Modulation (PWMX) Function File on page 159 for more information.
This file type is associated with the Selectable Timed Interrupt function. See Using the
Selectable Timed Interrupt (STI) Function File on page 318 for more information.
This file type is associated with the Event Input Interrupt instruction. See Using the Event
Input Interrupt (EII) Function File on page 322 for more information.
This file type is associated with the Real-Time Clock (time of day) function. See Real-Time
Clock Function File on page 57 for more information.
This file type contains information about the Memory Module. See Memory Module
Information Function File on page 60 for more information.
This file type contains information about the controller's hardware. See Base Hardware
Information Function File on page 62 for the file structure.
This file type contains information about the Communications with the controller. See
Communications Status File on page 63 for the file structure.
This file type contains information about the controller I/O. See Input/Output Status File on
page 89 for the file structure.
The file type contains information about the Ethernet Communications with the controller.
This file type is associated with the LCD screen, keypads, and trimpot.