Host Engineering Forum

General Category => ECOMs and ECOM100s => Topic started by: Henryp on December 24, 2014, 02:10:03 PM

Title: ecom 100 and password
Post by: Henryp on December 24, 2014, 02:10:03 PM

I’m using Ecom 100 cards in various DL PLCs at our treatment plant. It appears that when a DL PLC program is password protected, the ability to write to a bit or boolean is lost. If I connect to the PLC with DS5 using a password or if I remove the password, the ability to write to the bit is restored. V memory locations seem to be unaffected and work ok. I can duplicated the issue using Kepdirect’s OPC server and quick client and with my SCADA software and its Modbus driver.

Title: Re: ecom 100 and password
Post by: Controls Guy on December 24, 2014, 02:36:01 PM

There's a secret handshake!   :D

There's some rule for creating a password that still allows comms.  IIRC, you have to start the password with an "A" to allow it.  If that's not it, it's something like that.

Title: Re: ecom 100 and password
Post by: Controls Guy on December 24, 2014, 02:38:34 PM

Or better answer.....just switch to Do-More!  Do-More allows enable/disable of all the various rights for each user class, so this isn't an issue, plus selective protection of individual code blocks.

Title: Re: ecom 100 and password
Post by: plcnut on December 24, 2014, 03:55:27 PM

CG, you are correct: The password must start with a capital 'A' to allow write access.