Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
274 File Instructions
BSR - Bit Shift Right
Instruction Type: output
If you wish to shift more than one bit per scan, you must create a loop in
your application using the JMP, LBL, and CTU instructions.
The BSR instruction loads data into a bit array on a false-to-true rung
transition, one bit at a time. The data is shifted right through the array,
then unloaded, one bit at a time. The following figure shows the
operation of the BSR instruction.
BSL Instruction Valid Addressing Modes and File Types
For definitions of the terms used in this table see Using the Instruction Descriptions on page 92.
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 RTC HSC PTOX, PWMX STI EII BHI MMI LCD Immediate Direct Indirect Bit Word Long Word Element
File •••• •• • •••
Control
(2)
• •
Length
• •
Source •• ••• •
• ••
(1) See Important note about indirect addressing.
(2) Control file only. Not valid for Timers and Counters.
IMPORTANT
You cannot use indirect addressing with: S, MG, PD, RTC, HSC, PTOX,
PWMX, STI, EII, BHI, MMI, CS, IOS, and DLS files.
EN
DN
BSR
Bit Shift Right
File #B3:3
Control R6:0
Bit Address I:0/15
Length 1<
BSR
Execution Time for the BSR Instruction
Controller When Rung Is:
True False
MicroLogix 1400 6.0790 µs 5.9942 µs
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Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes