Allen-Bradley MicroLogix 1200 Reference Manual

Publication 1762-RM001C-EN-P
3-2 Function Files
Overview
Function Files are one of the three primary file structures within the
MicroLogix 1200 and MicroLogix 1500 controllers (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:
Table 3.1 Function Files
File Name File
Identifier
File Description
High-Speed Counter HSC This file type is associated with the High-Speed Counter function. See Using the
High-Speed Counter on page 5-1 for more information.
Pulse Train Output
(MicroLogix 1200 and 1500
BXB units only.)
PTO This file type is associated with the Pulse Train Output Instruction. See Pulse Train Outputs
(PTO) Function File on page 6-6 for more information.
Pulse Width Modulation
(MicroLogix 1200 and 1500
BXB units only.)
PWM This file type is associated with the Pulse Width Modulation instruction. See Pulse Width
Modulation (PWM) Function File on page 6-19 for more information.
Selectable Timed Interrupt STI This file type is associated with the Selectable Timed Interrupt function. See Using the
Selectable Timed Interrupt (STI) Function File on page 18-12 for more information.
Event Input Interrupt EII This file type is associated with the Event Input Interrupt instruction. See Using the Event
Input Interrupt (EII) Function File on page 18-17 for more information.
Real-Time Clock RTC This file type is associated with the Real-Time Clock (time of day) function. See Real-Time
Clock Function File on page 3-3 for more information.
Trim Pot Information TPI This file type contains information about the Trim Pots. See Trim Pot Information Function
File on page 3-5 for more information.
Memory Module
Information
MMI This file type contains information about the Memory Module. See Memory Module
Information Function File on page 3-6 for more information.
Data Access Tool
Information
(MicroLogix 1500 only.)
DAT This file type contains information about the Data Access Terminal. See DAT Function File
(MicroLogix 1500 only) on page 3-9 for more information.
Base Hardware Information BHI This file type contains information about the controller’s hardware. See Base Hardware
Information Function File on page 3-12 for the file structure.
Communications Status
File
CS This file type contains information about the Communications with the controller. See
Communications Status File on page 3-13 for the file structure.
I/O Status File IOS This file type contains information about the controller I/O. See Input/Output Status File on
page 3-18 for the file structure.

Allen-Bradley MicroLogix 1200 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1200
Category	Control Unit
Language	English