External repository for random data (errd) – Rockwell Automation 1732E-XXXX ArmorBlock 2-Port EtherNet/IP Modules with QuickConnect User Manual
Page 15
1732E ArmorBlock 2-Port EtherNet/IP Modules with QuickConnect 15
Publication 1732E-IN010C-EN-E - June 2013
Refer to On-Machine Connectivity Catalog, publication
, for Rockwell
Automation cable and cord set offerings or use the configuration tools available at
.
External Repository for Random Data (ERRD)
The QuickConnect modules provide onboard nonvolatile memory, of up to 6 Kbytes, for
storing block-specific data such as Tool ID and counter value. You can read from and write
to the module memory.
To read from the module
1. Send an EtherNet/IP Explicit Message with the following information:
To write to the module
2. Send the following three EtherNet/IP Explicit Messages:
Service Code
4C (hex)
Class ID
6E (hex)
Instance ID
1
Attribute ID
1
Request Data
Data Payload (total 8 bytes):
Offset Description
0x00
Address to Read from
0x04
Number of bytes to read (max. 472 bytes)
Start command
Service Code
06 (hex)
Class ID
6E (hex)
Instance ID
1
Attribute ID
1
Write command
Service Code
4D (hex)
Class ID
6E (hex)
Instance ID
1
Attribute ID
1
Request Data
Data Payload (max 8+ 472 bytes):
Offset Description
0x00
Address to Write to
0x04
Number of bytes to write (max. 472 bytes)
0x08
User Data (Array of USINT)