Retentive Timer On With Reset (Rtor); Structured Text; Function Block Operands; Fbd_Timer Structure - Allen-Bradley Logix5000 Reference Manual

Retentive Timer On with
Reset (RTOR)
RTOR(RTOR_tag);
Input Parameter Data Type
EnableIn BOOL
TimerEnable BOOL
PRE DINT
Reset BOOL
Output Parameter Data Type
EnableOut BOOL
ACC DINT
EN BOOL
TT BOOL
DN BOOL
Status DINT
InstructFault (Status.0) BOOL
PresetInv (Status.1) BOOL
Timer and Counter Instructions (TON, TOF, RTO, TONR, TOFR, RTOR, CTU, CTD, CTUD, RES)
The RTOR instruction is a retentive timer that accumulates time when
TimerEnable is set.
This instruction is available in relay ladder as two separate instructions:
· RTO (See
· RES (See
Operands:

Structured Text

Variable
RTOR tag

Function Block Operands

Operand
RTOR tag

FBD_TIMER Structure

Description
Function Block
If cleared, the instruction does not execute and outputs are not updated.
If set, the instruction executes.
Default is set.
Structured Text
No effect. The instruction executes.
If set, this enables the timer to run and accumulate time.
Default is cleared.
Timer preset value. This is the value in 1ms units that ACC must reach before timing is finished. If
invalid, the instruction sets the appropriate bit in Status and the timer does not execute.
Valid = 0 to maximum positive integer
Request to reset the timer. When set, the timer resets.
Description
The instruction produced a valid result.
Accumulated time in milliseconds. This value is retained even while the TimerEnable input is cleared.
This makes the behavior of this block different than the TONR block.
Timer enabled output. Indicates the timer instruction is enabled.
Timer timing output. When set, a timing operation is in progress.
Timing done output. Indicates when accumulated time is greater than or equal to preset.
Status of the function block.
The instruction detected one of the following execution errors. This is not a minor or major controller
error. Check the remaining status bits to determine what occurred.
The preset value is invalid.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
page 124).
page 153).
Type
FBD_TIMER
Type
FBD_TIMER
Format Description
Structure RTOR structure
Format Description
Structure RTOR structure
Chapter 3
137