Allen-Bradley MicroLogix 1200 Reference Manual

Publication 1762-RM001C-EN-P
Function Files 3-17
13 to 18 - Reserved
19 - Bad Character Count
20 to 22 - Reserved
Table 3.17 Active Node Table Block
Word Description
23 Active Node Table Category Identifier Code (always 3)
24 Length (always 4 for DH-485, always 0 for DF1 Full-Duplex, DF1 Half-Duplex Slave,
Modbus RTU Slave, and ASCII)
25 Format Code (always 0)
26 Number of Nodes (always 32 for DH-485, always 0 for DF1 Full-Duplex, DF1
Half-Duplex Slave, Modbus RTU Slave, and ASCII)
27 Active Node Table – Nodes 0 to 15 (CS0:27/1 is node 1, CS0:27/2 is node 2, etc.) This
is a bit-mapped register that displays the status of each node on the network. If a bit is
set (1), the corresponding node is active on the network. If a bit is clear (0), the
corresponding node is inactive.
28 Active Node Table – Nodes 16 to 31 (CS0:28/1 is node 16, CS0:28/2 is node 17, etc.)
This is a bit-mapped register that displays the status of each node on the network. If a
bit is set (1), the corresponding node is active on the network. If a bit is clear (0), the
corresponding node is inactive.
29 to 42 Reserved
Table 3.16 ASCII Diagnostic Counters Block
(MicroLogix 1500 1764-LRP Processors only)
Word Bit Description

Allen-Bradley MicroLogix 1200 Specifications

General

Series	MicroLogix 1200
Type	Programmable Logic Controller (PLC)
Mounting	DIN rail or panel mount
Programming Language	Ladder Logic
Programming Software	RSLogix 500
I/O Points	Up to 40
Communication Ports	RS-232, RS-485
Memory	6 KB user memory
Power Supply	24V DC or 120/240V AC
Expansion	Supports expansion I/O modules
Operating Temperature	0°C to 55°C (32°F to 131°F)
Dimensions	90 mm x 110 mm
Weight	0.5 kg (1.1 lbs)