159
Publication 1763-RM001C-EN-P - October 2009
Chapter
6
Relay-Type (Bit) Instructions
Use relay-type (bit) instructions to monitor and/or control bits in a data
file or function file, such as input bits or timer control-word bits. The
following instructions are described in this chapter:
These instructions operate on a single bit of data. During operation, the
processor may set or reset the bit, based on logical continuity of ladder
rungs. You can address a bit as many times as your program requires.
XIC - Examine if Closed
XIO - Examine if Open
Instruction Type: input
Use the XIC instruction to determine if the addressed bit is on. Use the
XIO instruction to determine if the addressed bit is off.
Instruction
Used To:
Page
XIC - Examine if Closed
Examine a bit for an ON condition
XIO - Examine if Open
Examine a bit for an OFF condition
OTE - Output Enable
Turn ON or OFF a bit (non-retentive)
OTL - Output Latch
Latch a bit ON (retentive)
OTU - Output Unlatch
Unlatch a bit OFF (retentive)
ONS - One Shot
Detect an OFF to ON transition
OSR - One Shot Rising
Detect an OFF to ON transition
OSF - One Shot Falling
Detect an ON to OFF transition
B3:0
0
B3:0
0
Execution Time for the XIC Instruction
Controller
When Instruction Is:
True
False
MicroLogix 1100
1.5
μ
s
1.45
μ
s
Execution Time for the XIO Instruction
Controller
When Instruction Is:
True
False
MicroLogix 1100
1.5
μ
s
1.5
μ
s
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive