ABB AC500 PLC - Page 773

LED Status Color LED = OFF LED = ON LED Flashes
S-ERR Sum Error Red -- Internal error
detected
2 Hz: Diag-
nostic event
happened
I/O-Bus Communica-
tion via the I/O
bus
Green No I/O bus
communica-
tion
Expansion
modules con-
nected
2 Hz: Error
I/O bus
RUN A CPU active Green CPU A is not
primary
CPU A is pri-
mary
RUN B LED
off:
CI590-CS31-
HA primary
self selection.
No primary
order from
both PLC.
PLC A has
been selected
as primary.
RUN B LED
on: 2 primary
orders. PLC B
is primary.
R. B CPU active Green CPU B is not
primary
CPU B is pri-
mary
RUN A LED
off:
CI590-CS31-
HA primary
self selection.
No primary
order from
both PLC.
PLC B has
been selected
as primary.
RUN A LED
on: 2 primary
orders. PLC A
is primary.
SYNC-ERR Outputs from
CPU A and
CPU B
Red -- Configuration
conflict
detected
10 Hz: Not
parameterized
2 Hz: Switch-
over has
occured
C0...C15 Digital inputs/
outputs
Yellow Input/output =
OFF
Input/output =
ON (the input
voltage is
even dis-
played if the
supply voltage
is OFF)
--
UP Process
supply voltage
and initializa-
tion
Green Process
voltage is
missing
Process
voltage
OK and initial-
ization com-
pleted
Module was
not initialized
correctly
Device Specifications
Communication Interface Modules (S500) > CS31
2019/04/17 3ADR010121, 13, en_US 773