EasyManuals Logo

Allen-Bradley MicroLogix 1200 Reference Manual

Allen-Bradley MicroLogix 1200
424 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #216 background imageLoading...
Page #216 background image
Publication 1762-RM001C-EN-P
16-6 Program Control Instructions
While the rung state of the first MCR instruction is true, execution
proceeds as if the zone were not present. When the rung state of the first
MCR instruction is false, the ladder logic within the MCR zone is executed
as if the rung is false. All non-retentive outputs within the MCR zone are
reset.
MCR zones let you enable or inhibit segments of your program, such as
for recipe applications.
When you program MCR instructions, note that:
You must end the zone with an unconditional MCR instruction.
You cannot nest one MCR zone within another.
Do not jump into an MCR zone. If the zone is false, jumping into it activates
the zone.
NOTE
The MCR instruction is not a substitute for a hard-wired
master control relay that provides emergency stop
capability. You still must install a hard-wired master
control relay to provide emergency I/O power shutdown.
ATTENTION
!
If you start instructions such as timers or counters in an
MCR zone, instruction operation ceases when the zone is
disabled. Re-program critical operations outside the zone
if necessary.

Table of Contents

Other manuals for Allen-Bradley MicroLogix 1200

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Allen-Bradley MicroLogix 1200 and is the answer not in the manual?

Allen-Bradley MicroLogix 1200 Specifications

General IconGeneral
SeriesMicroLogix 1200
TypeProgrammable Logic Controller (PLC)
MountingDIN rail or panel mount
Programming LanguageLadder Logic
Programming SoftwareRSLogix 500
I/O PointsUp to 40
Communication PortsRS-232, RS-485
Memory6 KB user memory
Power Supply24V DC or 120/240V AC
ExpansionSupports expansion I/O modules
Operating Temperature0°C to 55°C (32°F to 131°F)
Dimensions90 mm x 110 mm
Weight0.5 kg (1.1 lbs)

Related product manuals