Series 8 C300 Controller User's Guide 
Honeywell 
8. C300 Redundancy operation 
8.2. Redundancy configuration restrictions 
 
 
 
 
1.  Factory data, such as: Vendor ID, Product Type, and Product Code must be identical 
to ensure same platform hardware. 
2.  Firmware Type must be identical ensure same platform firmware.  Synchronization 
cannot be allowed across different personalities. 
3.  The Build ID strings are compared to detect difference in firmware versions. Some 
platforms that use physical memory transfer as part of their redundancy solution are 
sensitive to a difference in firmware versions.  This includes C300. 
4.  The partner module must have a properly configured Device Index.  If this module 
has an odd Device Index N, the partner module has to have the even Device Index 
N+1.  Otherwise, if this module has an even Device Index M, the partner module has 
to have the odd Device Index M-1. 
 
Redundancy compatibility parameter - RDNCMPT 
The RDNCMPT parameter indicates the following compatibility results. 
 
Module is configured as non-redundant. 
Initial/default state when no partner is responding to the
 
partner compatibility query. 
Transient state while partner compatibility check is
 
being performed. 
Compatible indication for those platforms not sensitive
 
to difference in firmware versions. 
This includes FIM, Series 8 FIM, and IOLINK. 
Compatible indication for those platforms sensitive to
 
difference in firmware versions (that is, C300) when
 
firmware versions are identical. 
The size of the partner's compatibility message is
 
unexpected. 
The partner's Vendor ID does not match. 
The partner's Product Type does not match. 
The partner's Product Code does not match. 
The partner's Major revision is not supported. 
The partner's Minor revision is not supported.