Despatch Protocol Plus Modbus Communications - Manual (Page 2)

Chromalox Instruments and Controls
A-51643 Rev. 6 10/06/03 i
Revision History
Rev. Date Description
0 10/6/1998 Original Release
1 01/25/1999 Major revisions to match tested software.
2 02/12/1999 Corrected temperature readout descriptions to 1 F from 0.1 F. Corrected misc.
typos. Removed front panel security code holding register. Moved
communication security code holding register to address 0.
3 03/22/1999 Corrected figure references in communication card setup sections. Added text
concerning level 1 & 2 password holding registers.
4 01/24/2002 Added holding register address references for new menus for software version 3.0
and 3.1(Heat/Cool).
5 06/10/2002 Added section 7, Programming Example and General Hints
6 10/6/2003 Section 3.6, change data address information in register 449.
Approvals
Project Manager Bhupesh Gandhi
Design Engineer Bhupesh Gandhi
Engineering Manager Al Roman
Sales Manager Gus Guthrie
Customer Rich Johnson
Customer Brian Hajder