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Allen-Bradley MicroLogix 1000 User Manual

Allen-Bradley MicroLogix 1000
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Preface
MicroLogix 1000 Programmable Controller User Manual
13–4
Control Block Address
– an integer file address that you select. It consists of 7
integer words, containing the status bits, target file address, and other data
associated with the MSG instruction.
Control Block Length – fixed at seven elements. This field cannot be altered.
Note When
running a Micr
oLogix 1000 pr
ogram on an SLC 5/03 or SLC 5/04
processor
, or on channel 0 of an SLC 5/05 pr
ocessor, the MSG control block
length incr
eases fr
om 7 to 14 wor
ds. If you plan to run a MicroLogix 1000
pr
ogram with one of these pr
ocessors, make sur
e that the pr
ogram has at least 7
unused wor
ds following each MSG contr
ol block.
The table that follows illustrates combinations of message types and tar
get devices
and their valid file types.
Command Type
Message
Type
Initiating
Device
Valid File
Types
Target
Device
➀➁➂
Valid File Types
SLC500/ML1000 Write MicroLogix 1000 O,I,S,B,T,C,R,N MicroLogix 1000 O,I,S,B,T,C,R,N
SLC500/ML1000 Read MicroLogix 1000 O,I,S,B,T,C,R,N MicroLogix 1000 O,I,S,B,T,C,R,N
CIF Write MicroLogix 1000 O,I,S,B,T,C,R,N MicroLogix 1000 N7
CIF Read MicroLogix 1000 O,I,S,B,T,C,R,N MicroLogix 1000 N7
SLC500/ML1000 Write MicroLogix 1000 O,I,S,B,T,C,R,N SLC 500 O
,I
,S,B,T,C,R,N
SLC500/ML1000 Read MicroLogix 1000 O,I,S,B,T,C,R,N SLC 500 O
,I
,S,B,T,C,R,N
CIF Write MicroLogix 1000 O,I,S,B,T,C,R,N SLC 500 N9
CIF Read MicroLogix 1000 O,I,S,B,T,C,R,N SLC 500 N9
The
DF1 Full-Duplex protocol can be used if the target device supports it. Such devices include MicroLogix 1000
controllers (any series), SLC 5/03, SLC 5/04 and SLC 5/05 processors, and PLC-5 processors (CIF command
type only).
The DH-485 protocol can be used if the target device supports it. Such devices include MicroLogix 1000
controllers (except for Series A and B discrete controllers) and SLC 500, SLC 5/01, SLC 5/02, SLC 5/03, SLC
5/04 or SLC 5/05 processors.
The DF1 Half-Duplex protocol can also be used with Series D or later discrete and all analog MicroLogix 1000
controllers, but a master is required, such as an SLC 5/03, SLC 5/04 or SLC 5/05 processor
.
SLC 500, SLC 5/01, and SLC 5/02 processors do not support O or I file access from a MSG instruction.
SLC 5/03, SLC 5/04 and SLC 5/05 processors do support O and I file access, but only when unprotected.
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Allen-Bradley MicroLogix 1000 Specifications

General IconGeneral
Communication PortsRS-232
Power Supply24V DC or 120/240V AC
Programming SoftwareRSLogix 500
ManufacturerAllen-Bradley
CategoryController
SeriesMicroLogix
Programming LanguageLadder Logic
Input Voltage24V DC or 120/240V AC
I/O Points10 to 32 points
Processor Type8-bit
Operating Temperature0…55 °C (32…131 °F)
Processor8-bit

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