Operation Timing For I/O Instructions; Tr Bits - Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual

Programmable controllers

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Sequence Input Instructions

3-3-10 Operation Timing for I/O Instructions

The following chart shows the differences in the timing of instruction opera-

tions for a program configured from LD and OUT.

Instruction execution

TR bits are used to temporarily retain the ON/OFF status of execution condi-

tions in a program when programming in mnemonic code. They are not used

when programming directly in ladder program form because the processing is

automatically executed by the Peripheral Device. The following diagram

shows a simple application using two TR bits.

Input received

I/O refreshing

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