Rockwell Automation Allen-Bradley Logix 5000 Series User Manual

Chapter 5
PCCC Commands
90 Rockwell Automation Publication 1756-PM020F-EN-P - January 2019
See also
PLC-2 Communication Commands on page 83
The SLC commands use strictly a logical form of addressing (for example,
file/element/sub-element). For details about mapping the SLC files to
Logix 5000 tags, see the
Logix 5000 Controllers Design Considerations
Reference Manual, publication 1756-RM094.
Logix handles protected and unprotected commands the same way, whether
the access for data is set to Read/Write, Read Only, or None.
Important:
For the SLC Typed Read and Typed Write commands, map the data files to Logix tags of types INT, DINT, or REAL only. Use an SLC or
MicroLogix file data type that matches the data type of the Logix tag.
For INT tags, use file type 85hex (Binary) or 89hex (Integer)
For DINT tags, use file type 91hex (Long - MicroLogix only)
For REAL tags, use file type 8Ahex (Float)
For more information on SLC file types, see the DF1 Protocol and Command Set Reference Manual, publication 1770-6.5.16
.
SLC logical addressing has a limited number of logical address levels so
there are some special concerns.
In a The element number is used as the
One-dimension array Dimension index for addressing (data[elem])
Two-dimensional array Index of the second dimension and the first dimension index is 0
(data[0][elem])
Three-dimensional array Index of the third dimension and the first and second dimension indices are
both 0 (data[0][0][elem])
See also
SLC Protected Typed Logical Read with 3 Address Fields (CMD=0F,
4F; FNC=A2) on page 90
SLC Protected Typed Logical Write with 3 Address Fields(CMD=0F,
4F, FNC=AA) on page 91
SLC Protected Typed Logical Read with 2 Address Fields (CMD=0F,
4F; FNC=A1) on page 91
SLC Protected Typed Logical Write with 2 Address Fields (CMD=0F,
4F; FNC=A9) on page 92
PCCC Commands on page 81
The service is supported for compatibility with SLC modules. It reads data
from the logical address.
Request Format: [byte size][file number][file type][element number][sub-element number]
SLC Communication
Commands
SLC Protected Typed Logical
Read with 3 Address Fields
(CMD=0F, 4F; FNC=A2)

Rockwell Automation Allen-Bradley Logix 5000 Series Specifications

General

Series	Logix 5000
Category	Controller
Programming Languages	Ladder Diagram (LD), Function Block Diagram (FBD), Structured Text (ST), Sequential Function Chart (SFC)
Communication Protocols	EtherNet/IP, ControlNet, DeviceNet
Programming Software	Studio 5000
Supported I/O	Digital, Analog, Specialty (e.g., motion, temperature)
Processor Type	Varies by model (depends on specific model)
Communication Ports	Ethernet, USB, serial (depends on model)
Operating Temperature	0°C to 60°C (32°F to 140°F)
Power Supply	Varies by model (e.g., 24V DC, 120/240V AC)
Certifications	UL, CE, ATEX

Summary

Important user information

Safety Warnings and Definitions

Explains safety icons like WARNING, ATTENTION, and SHOCK HAZARD, and their implications.

Summary of Changes

New or Enhanced Features

Details new or updated information and features introduced in this manual release.

Chapter 1 CIP services

CIP Data Types

Explains atomic, structure, and array data types used in CIP communication.

Services Supported by Logix 5000 Controllers

Lists vendor-specific CIP services that operate on tags within the controller.

Chapter 2 CIP Services and User-created Tags

Step 1: Find user-created controller scope tags

Describes retrieving symbol name and type attributes for controller tags.

Step 3: Determine the structure makeup

Explains how to read template instance attributes for structure details.

Step 4: Determine the data packing

Details understanding how structure members are arranged in memory for access.

Chapter 3 CIP Addressing Examples

Atomic Members of Predefined Data Types

Provides examples of accessing atomic data types using CIP addressing methods.

Access User-Defined Structures

Demonstrates accessing user-defined structures using Symbolic Segment Addressing.

Chapter 4 CIP Over the Controller Serial Port

Unconnected Messaging (UCMM) through PCCC

Details using PCCC command 0B for serial port requests.

Connected Explicit Messages through PCCC

Explains using PCCC command 0A for explicit message connections.

Chapter 5 PCCC Commands

PLC-2 Communication Commands

Describes commands for accessing Logix 5000 tags via PLC-2.

PLC-5 Communication Commands

Details commands for accessing data using PLC-5 addressing methods.

SLC Communication Commands

Covers commands for accessing data using SLC logical addressing.

Rockwell Automation support

Installation assistance

Provides contact details for technical support during product installation.

Documentation feedback

How to provide suggestions for improving the document.