Rockwell Automation 1772-LV Mini-PLC - 2/15 Programmable Controller (Series B) Programming and Operations - Manual (Page 176)

Quick Reference Section
Appendix A
AĆ7
Table A.D
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 most significant digit in the word address must be an even number.
The time base, TB, is user-selectable and can be 1.0, 0.1, or 0.01 second. Preset values, YYY, and accumulated values, ZZZ, can vary from 000
to 999.
Bit 15 is the timed bit. Bit 17 is the enable bit.
The word address displayed will be 3 or 4 digits long depending on the data table size. When entering the word address, ust a leading zero if
necessary.
Key Symbol Instruction Name 1770-T3 Display Rung Condition Status Bit
-(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.
When the rung is true:
Bit 15 - set when AC = PR
Bit 17 - set
When the rung is false:
Bits 15 and 17 - reset
-(TOF)- Timer Off Delay XXX
-(TOF)-
TB
PR YYY
AC ZZZ
When the rung is true, the timer resets the
accumulated value to 000.
When the rung is false, the timer begins to
increment the accumulated value.
When the rung is true:
Bit 15 - set
Bit 17 - set
Whenthe rung is false:
Bit 15 - resets when AC = PR bit 17
reset
-(RTO)- Retentive Timer XXX
-(RTO)-
TB
PR YYY
AC ZZZ
When the rung is true, the timer begins to
incremetn the acumulated value. When
false, the accumualted value is retained.
When the rung is true:
Bit 15 - set when AC = PR
bit 17 - set
When the rung is false:
Bit 15 - no ation is taken.
Bit 17 - reset
-(RTR)- Retentive TImer
Reset
XXX
-(RTR)-
PR YYY
AC ZZZ
XXX - Word address of the retentive timer it
is resetting.
The preset and accumulated values are
automatically entered by the industrial
terminal.
WHen the rung is true, the accumulated
value and status bits are reset.
When the rung is true:
Bit 15 and 17 - reset
When the rung is false:
No action is taken.