Verification of Redundant CPU Section 4 Operation
188 3BSE036351-510 A
Verification of Redundant CPU
Check, in redundant configuration, the following LED indicators on
PM861/PM864/PM865/PM866/PM891 and, if used, SM810/SM811
(see Table 24 on page 188).
CI872
F(ault) Red LED must be OFF OK
R(un) Green LED must be ON (steady) OK
CI873
F(ault) Red LED must be OFF OK
R(un) Green LED must be ON (steady) OK
Table 24. AC 800M Controller
(PM861/PM864/PM865/PM866/PM891/SM810/SM811) – Verification of
Satisfactory System Operation in Redundant configuration
LED Indicator Status
AC 800M Controller
Status
Primary CPU Back-up CPU
PRIM(ary) yellow ON PRIM(ary) yellow OFF OK
DUAL yellow ON DUAL yellow ON OK
Primary SM810/SM811 Back-up SM810/SM811
PRIM(ary) yellow ON PRIM(ary) yellow OFF OK
SYNC yellow ON SYNC yellow ON OK
Table 23. AC 800M Controller – Verification of Satisfactory System Operation
LED Indicator Status
AC 800M
Controller
Status