18. Appendix I 
18.2. Description 
554  Experion PKS Series A Fieldbus Interface Module User's Guide   R400 
 Honeywell July 2010 
Tab 
Parameter Default Value  Description 
    When this parameter is On 
and the device is attached 
to the network at one of the 
default addresses, the NMA 
regards the value as a 
configuration value and 
does not attempt to acquire 
the LAS.  
    When this parameter is On 
or it receives a FMS 
Write.ind to turn it On from 
the NMA of a Link Master 
device that is not the LAS 
and is at an assigned 
address instead of a default 
one on the network, the 
NMA instructs the Data Link 
Management Entity (DLME) 
to acquire the LAS. The two 
possible outcomes are as 
follows.  
f)  If the DLME indicates that 
the attempt failed, the NMA 
sets the value of this 
parameter to Off. If a FMS 
write response is pending, 
the NMA returns a negative 
response.  
g)  If the request succeeds on 
either the first or the second 
attempt, the NMA sets the 
value of the parameter to 
On (if not On already). If an 
FMS write response is 
pending, the NMA returns a 
positive response.  
 
Boot Operational 
Function Class 
(BOOT_OPER) 
LINKMASTER 
Specifies the Operational 
Function Class that the device 
assumes when it is powered up. 
The class selections are Basic, 
Link Master, and Bridge. The 
FIM is the Primary Link Master