Honeywell HPM

2 Equipment Description
2.27 EUCN Cable System
150 HPM High-Performance Process Manager Service R688
Honeywell December 2020
No UCN coaxial
cable problems
A
SIL
B
SIL
A
NSY
B
NSY
OK/OK
UCN:
OK/BACKUP
LCN: OK/BACKUP
FTE composite status
A->A
A->B
B->A
B->B
OK
OK
OK
OK
If UCN cable A
on an ENB node
has a problem
A
SIL
B
SIL
A
NSY
B
NSY
FAIL/OK
UCN:
OK/BACKUP
LCN: OK/BACKUP
*
FTE composite status
A->A
A->B
B->A
B->B
OK
OK
OK
OK
If UCN cable B
on an ENB node
has a problem
A
SIL
B
SIL
A
NSY
B
NSY
FAIL/OK
UCN:
OK/BACKUP
LCN: OK/BACKUP
*
FTE composite status
A->A
A->B
B->A
B->B
OK
OK
OK
OK
If both UCN cable
A and B on an
ENB node have a
problem
Primary fails,
Secondary takes
over as the
primary
A
SIL
B
SIL
A
NSY
B
NSY
OK/OK
UCN:
OK/OFFNET
LCN:
FAIL/WARNING
*
[1]
*
[1]
FTE composite status
A->A
A->B
B->A
B->B
OK
OK
OK
OK
[1]
Note: The A SIL, B SIL, A NSY, and B NSY indications only appear for an instant and then shows
blank due to node failure.
Note: If any SIL or NSY bits are set, then the corresponding cables are backlit on the UCN Status
Display, if the UCN CABLE STATUS target is chosen.