E1.20 RDM (Remote Device Management) Protocol Forums  

Go Back   E1.20 RDM (Remote Device Management) Protocol Forums > RDM Developer Forums > RDM Interpretation Questions

RDM Interpretation Questions Discussion and questions relating to interpreting and understanding the E1.20 RDM Standard.

Reply
 
Thread Tools Search this Thread Display Modes
Old January 12th, 2007   #1
prwatE120
Task Group Member
 
Join Date: Jun 2006
Posts: 180
Default Table 6-6 Checksum Example Error

In section 6.2.11 Table 6.6 we have an example of checksum usage.

It happens to use of a GET_COMMAND: STATUS_MESSAGES and shows in slot #24 a value of 0xFF for the paramater data STATUS_ERROR.

HOWEVER the Status Type define for STATUS_ERROR is shown in Table A-4 as 0x04.

How did I find this ??

A controller (by others) sent me a GET:STATUS_MESSAGES with 0xFF in the paramater data, which I rejected with a
NACK: NR_DATA_OUT_OF_RANGE, since the only valid values (from Table A-4) are 0x00 thru 0x04.

I suggest we review this (and other task group posts) in Dallas before making some of this knowledge public via this forum

regards
prwatE120 is offline   Reply With Quote
Old January 19th, 2007   #2
sblair
Administrator
 
Join Date: Feb 2006
Posts: 419
Send a message via AIM to sblair Send a message via MSN to sblair
Default

That example is incorrect. The correct value for STATUS_ERROR is 0x04. The correct value for SC_SUB_MESSAGE is 0x01.

With the STATUS_ERROR of 0x04 and SC_SUB_MESSAGE, the correct Checksum would be: High Byte=0x06, Low Byte=0x69.
__________________
Scott M. Blair
RDM Protocol Forums Admin

Last edited by sblair; January 19th, 2007 at 09:08 PM.
sblair is offline   Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
COMMS_STATUS Error reporting prwatE120 RDM Interpretation Questions 0 January 20th, 2007 08:07 AM
ACK_TIMER Example Error prwatE120 RDM Interpretation Questions 1 December 26th, 2006 04:46 PM
Checksum curiosa sjackman RDM General Implementation Discussion 3 October 3rd, 2006 07:24 AM
Discovery Checksum Problem Analysis nic123 RDM General Implementation Discussion 3 September 24th, 2006 11:25 PM
Error counters Nigel Worsley RDM Interpretation Questions 1 July 3rd, 2006 04:42 PM


All times are GMT -6. The time now is 07:45 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.