ABB AC500 PLC - Page 822

LED Status Color LED = OFF LED = ON LED flashes
PWR System
voltage
Green Missing
internal
system
voltage or
field bus
supply is
missing
Internal
system
voltage is OK
--
CS31 CS31 commu-
nication
Green No communi-
cation at the
CS31 bus
module
Communica-
tion at the
CS31 bus OK
Diagnosis
mode
S-ERR Sum Error Red No error or
system
voltage is
missing
Internal error
(storing can
be parameter-
ized)
--
I/O-Bus Communica-
tion via the I/O
bus
Green No I/O mod-
ules con-
nected or data
error
I/O modules
connected
Error I/O bus
Reserved Not defined - - - -
I0...I7 Digital inputs Yellow Input = OFF Input = ON
(the input
voltage is
even dis-
played if the
supply voltage
is OFF)
-
C8...C23 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
--
CH-ERR2 Channel Error,
error mes-
sages in
groups (digital
inputs/outputs
combined into
the groups 2
to 4)
Red No error Severe error
within the cor-
responding
group
Error on one
channel of the
corresponding
group (e.g.
short-circuit at
an output)
CH-ERR3 Red
CH-ERR4 Red
CH-ERR *) Module Error Red No error or
process
voltage is
missing
Internal error --
*) All LEDs CH-ERR2 to CH-ERR4 light up together
The status of the LEDs concerning the CS31 bus module in connection with the I/O modules is
described in detail in the S500 system data.
Device Specifications
Communication Interface Modules (S500) > CS31
2019/04/173ADR010121, 13, en_US822