ABB AC 800M

AC 800M Controller (PM8xx) Section 4 Operation
110 3BSE 027 941 R301
B(attery) Green Normal state – ON
Lit when condition of internal or external
battery is satisfactory. The LED is
controlled by a software battery voltage test
– BATTOK
(1)
.
Tx Yellow Data Transmission
CN1 + CN2 and COM3 + COM4
Flashes in synchronization with Tx traffic
Rx Yellow Data Reception
CN1 + CN2
COM3 + COM4
Flashes in synchronization with Rx traffic
Valid for PM861/PM864
PRIM(ary) Yellow Lit in single and redundant configuration.
Indicates Primary CPU in redundant
configuration. Controlled by software.
DUAL Yellow Lit when the CPU is running in redundant
configuration and synchronized state.
(1) The software performs cyclic battery voltage level tests via a dedicated LED control input. The
battery provides back-up power for both the application memory and the real time clock during
power down. The battery is either accessible via the PM8xx cover panel or externally connected
to the external battery connector. Battery voltage is checked by the software. Voltage is common
for both the internal and external battery. For this reason the internal battery should be removed
when using the external battery, since having two batteries connected in parallel will result in
greatly reduced capacity.
Table 15. PM8xx – LED Indicators (Continued)
Marking Color Function