Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
92 Programming Instructions Overview
Using the Instruction
Descriptions
Throughout this manual, each instruction (or group of similar instructions)
has a table similar to the one shown below. This table provides
information for all sub-elements (or components) of an instruction or
group of instructions. This table identifies the type of compatible address
that can be used for each sub-element of an instruction or group of
instructions in a data file or function file. The definitions of the terms used
in these tables are listed below this example table.
The terms used within the table are defined as follows:
• Parameter - The parameter is the information you supply to the
instruction. It can be an address, a value, or an instruction-specific
parameter such as a timebase.
• Data Files - See Data Files on page 45.
• Function Files - See Function Files on page 55.
• CS - See Communications Status File on page 63.
• IOS - See Input/Output Status File on page 89.
• DLS - See Data Log Status File on page 526.
• Address Mode - See Addressing Modes on page 93.
• Addressing Level - Address levels describe the granularity at which
an instruction allows an operand to be used. For example, relay
type instructions (XIC, XIO, etc.) must be programmed to the bit
level, timer instructions (TON, TOF, etc.) must be programmed to
the element level (timers have 3 words per element) and math
instructions (ADD, SUB, etc.) must be programmed to the word or
long word level.
Valid Addressing Modes and File Types - Example Table
Parameter
Data Files Function Files
CS - Comms IOS - I/O DLS - Data Log
Address
Mode
(1)
Address
Level
O I S B T, C, R N F ST L MG, PD RI/RIX PLS ASCII RTC HSC PTOX, PWMX STI EII BHI MMI LCD Immediate Direct Indirect Bit Word Long Word Element
Source A •••••••••• • •••••••••••• • •••
Source B •••••••••• • •••••••••••
• • •••
Destination •••••••••• • •••••
• •••
(1) See Important note about indirect addressing.
IMPORTANT
You cannot use indirect addressing with: S, MG, PD, RTC, HSC, PTOX,
PWMX, STI, EII, BHI, MMI, CS, IOS, and DLS files.
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Allen-Bradley MicroLogix 1400 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1400
Category	Controller
Language	English