Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 229)

Chapter 16
Bit Instructions
16–5
(L)
Output Latch, Output Unlatch OTL, OTU Output Instruction
(U)
(L)
B3
6
(U)
B3
6
F1 F2 F3 F4 F5
ZOOM on OTL –(L)– 2.3.0.0.2
NAME: OUTPUT LATCH
BIT ADDR: B3/6 *********0******
EDT_DAT
HHT Ladder Display:
HHT Zoom Display:
Ladder Diagrams and APS Displays:
F1 F2 F3 F4 F5
ZOOM on OTU –(U)– 2.4.0.0.2
NAME: OUTPUT UNLATCH
BIT ADDR: B3/6 *********0******
EDT_DAT
(online monitor mode)
Logic States:
Rung New
1
1
1
0
0
1
0
0 True
False
True
False
True
False
True
False
1
0
1
0
State Condition
Previous
State
Instruction
OTL
OTU
These are retentive output instructions that can be used in a pair for the data
table bit they control. Possible logic states are indicated in the table above.
OTL and OTU instructions can also be used to initialize data values at the bit
level.
When you assign an address to the OTL instruction that corresponds to the
address of an external output terminal, the output device wired to this
terminal is energized when the bit in memory is set (1). An OTU instruction
with the same address as the OTL instruction resets (0) the bit in memory.
Output Latch (OTL), Output
Unlatch (OTU)