Rockwell Automation 1785 PLC-5 User Manual download pdf (Page 59)

The PLC-5 controller supports multiple industry-standard programming

languages. You can program logic in IEC

1131-based structured text, function

block, and built-in ladder logic instructions.

Instruction Set

See the Product Certification link at

http://www.rockwellautomation.com/products/certification for Declarations

of Conformity, Certificates, and other certification details.

Instruction Family Description

Relay-type The bit (relay-type) instructions monitor and control the status of bits.

XIC, XIO, OTE, OTL, OTU,IIN, IOT, IDI, IDO

Timer and Counter The timer and counter instructions control operations based on time or the number of events.

TON, TOF, RTO, CTU, CTD, RES

Compare The compare instructions compare values by using an expression or a specific compare instruction.

CMP, EQU, GEQ, GRT, LEQ, LES, LIM, MEQ, NEQ

Compute The compute/math instructions evaluate arithmetic operations using an expression or a specific arithmetic

instruction.

CPT, ACS, ADD, ASN, ATN, AVE, CLR, COS, DIV, LN, LOG, MUL, NEG, SIN, SQR, SRT, STD, SUB, TAN, XPY

Logical The logical instructions perform logical operations on bits.

AND, NOT, OR, XOR

Conversion The conversion instruction convert integer and BCD values or convert radian and degree values.

TOD, FRD, DEG, RAD

Bit Modify Move The move instructions modify and move bits.

BTD, MOV, MVM

File The file instructions perform operations on file data and compare file data.

FAL, FSC, COP, FLL

Diagnostic The diagnostic instructions compare data to help you detect problems.

FBC, DDT, DTR

Shift Use the shift instructions to modify the location of data within files.

BSL, BSR, FFL, FFU, LFL, LFU

Sequencer Sequencer instructions monitor consistent and repeatable operations.

SQO, SQI, SQL

Program Control Program flow instructions change the flow of ladder program execution.

MCR, JMP, LBL, FOR, NXT, BRK, JSR, SBR, RET, TND, AFI, ONS, OSR, OSF, SFR, EOT, UIE, UID

Process Control The process control instruction provides closed-loop control.

PID

Block-transfer The block-transfer instructions transfer words to or from other devices.

BTR, BTW, CIO

Message The message instruction reads or writes a block of data to another station.

MSG

ASCII The ASCII instruction read, write, compare, and convert ASCII strings.

ABL, ACB, ACI, ACN, AEX, AHL, AIC, ARD, ARL, ASC, ASR, AWA, AWT

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Rockwell Automation 1785 PLC-5 User Manual Page 59