Rockwell-automation 1772-LP3 PLC - 2/30 Programmable Controller Progra Uživatelský manuál stáhnout pdf (Strana 114)

Timer and Counter Instructions

Chapter 5

516

Table 5.B

Timer

Instructions

NOTE: The Timer word address, XXX, is assigned to the timer Accumulated areas of the Data Table. To determine which addresses are valid

accumulated areas, the 3rd digit from the right in the word address must be even.

The time base, TB, is userselectable and can be 1.0 sec., 0.1 sec., or 0.01 sec. Preset values, YYY, and Accumulated values, ZZZ, can vary from

000 to 999.

The word address displayed will be 3, 4, or 5 digits long depending on the Data Table size. When entering the word address, use a leading zero if

necessary.

Keytop Symbol Instruction Name 1770T3 Display Description

-(TON)- TIMER ON DELAY XXX

-(TON)-

TB

PR YYY

AC ZZZ

When the rung is TRUE, the timer begins to increment the

Accumulated Value at a rate specified by the time base.

When the rung is FALSE, the timer resets the Accumulated

Value to 000. See Note.

-(TOF)- TIMER OFF DELAY XXX

-(TOF)-

TB

PR YYY

AC ZZZ

When the rung is FALSE, the timer begins to increment the

Accumulated Value.

When the rung is TRUE, the timer resets the Accumulated

Value to 000. See Note.

-(RTO)- RETENTIVE TIMER XXX

-(RTO)-

TB

PR YYY

AC ZZZ

When teh rung is TRUE, the timer begins to increment the

Accumulated value. When FALSE, the Accumulated value

is retained.

It is reset only by the RTR instruction. See Note.

-(RTR)- RETENTIVE TIMER

RESET

XXX

-(RTR)-

PR YYY

AC ZZZ

XXX - Word address of the retentive timer it is resetting.

YYY - Preset Value automatically entered by the Industrial

Terminal.

ZZZ - Accumulated Value automatically entered by the

Industrial Terminal.

When the rung is TRUE, the Accumulated Value and

status bit are reset to zero. See Note.

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 345 346

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