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Jack H.Integration and automation of manufacturing systems.2001.pdf
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page 174

S2:46-S2:54,S2:55-S2:56 PII (Programmable Input Interrupt) settings S2:55 STI last scan time (ms)

S2:77 communication scan time (ms)

7.12.1.5 - User Function Memory

• Control file R6 is used by various functions to track progress. Values that are available are, listed below. The use of these bits is specific to the function using the control location.

EN - enable bit

EU - enable unload

DN - done bit

EM - empty bit

ER - error bit

UL - unload bit

IN - inhibit bit

FD - found bit

LEN - length word

POS - position word

7.13 INSTRUCTION TYPES

• There are basic categories of instructions,

Basic (discussed before)

-relay instructions

-timer instructions

-counter instructions Program Control

-branching/looping

-immediate inputs/outputs

-fault/interrupt detection Basic Data Handling

-moves