Otl - Output Latch Otu - Output Unlatch - Allen-Bradley MicroLogix 1400 Instruction Manual

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170 Relay-Type (Bit) Instructions
OTE Instruction Valid Addressing Modes and File Types
For definitions of the terms used in this table see Using the Instruction Descriptions on page 92.
Parameter
Destination Bit • • • •
(1) PTOX and PWMX files are only for use with MicroLogix 1400 BXB or BXBA unit.
(2) See Important note about indirect addressing.
OTL - Output Latch
OTU - Output Unlatch
B3:0
L
1
B3:0
U
1
Publication 1766-RM001A-EN-P - October 2008
Addressing Modes and File Types can be used as shown in the following
table:
Data Files
• • • •
You cannot use indirect addressing with: S, MG, PD, RTC, HSC, PTOX,
IMPORTANT
PWMX, STI, EII, BHI, MMI, LCD, CS, IOS, and DLS files.
Instruction Type: output
Execution Time for the OTL and OTU Instructions
Controller OTL - When Rung Is:
True
MicroLogix 1400 0.2541 µs
The OTL and OTU instructions are retentive output instructions. OTL
turns on a bit, while OTU turns off a bit. These instructions are usually
used in pairs, with both instructions addressing the same bit.
If you enable interrupts during the program scan via an OTL, OTE, or UIE,
ATTENTION
this instruction must be the last instruction executed on the rung (last
instruction on last branch). It is recommended this be the only output
instruction on the rung.
Since these are latching outputs, once set (or reset), they remain set (or
reset) regardless of the rung condition.
(1)
Function Files
• • • • •
False
0.1882 µs
Address
Address Level
(2)
Mode
• • • •
OTU - When Rung Is:
True False
0.2830 µs 0.1732 µs