Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 138)

Chapter 8
Using Basic Instructions
8–19
Once instruction entry is complete, the parameters are condensed to two
screens as shown here:
P 0 0 0 T O F T 0 1
P 1 2 0 A 0
P 0 0 0 T O F B A S E
0 . 0 1 S E C
When the controller changes from the RRUN, RCSN, or RSSN mode to the
RPRG mode, or user power is lost while a timer off-delay instruction is
timing but has not reached its preset value, the following occurs:
•
Timer Enable (EN) bit remains set.
•
Timer Timing (TT) bit remains set.
•
Timer Done (DN) bit remains set.
•
Accumulated value (ACC) remains the same.
On returning to the RRUN, RCSN, or RSSN mode, the following can
happen:
Condition Result
If the rung is true: TT bit is reset.
DN bit remains set.
EN bit is set.
ACC value is reset.
If the rung is false: TT bit is reset.
DN bit is reset.
EN bit is reset.
ACC value is set equal to the preset value.
!
ATTENTION: The Reset (RES) instruction cannot be used with
the TOF instruction because RES always clears the status bits as
well as the accumulated value. (See page 8–27.)
Important: The TOF times inside an inactive MCR Pair.