ABB AC31 Assembly And Operation Manual page 151

Since in the replacement device the functionality of the extension box is integrated in the hard-
ware, error code 6 (failure of extension box) does not occur.
The input/output functions of the extensions (AX501/ 3AI1AO, DI501/ 4DI) have no diagnoses.
Table 95: Device LEDs
LED
PWR
CS31
bus
S-ERR
I/O bus
The S-ERR LED remains on even if the error no longer occurs. The error must be confirmed by
the control system (PLC/central unit), e.g. by means of a function block
data and CS31 bus system data" on page 4.
Special cases with rapidly flashing LEDs (approx. 5 Hz):
● All 4 LEDs flash rapidly: An incorrect S500 module is connected to the device. The device
fails to initialize.
● The LEDs of the CS31 bus, S-ERR bus and I/O bus flash rapidly: Invalid position of DIP
switches. The device fails to initialize.
● The LEDs of the S-ERR bus and I/O bus flash rapidly: A checksum error occurred in an
internal Flash memory.
● The LED of the I/O bus flashes rapidly: An error occurred in an internal RAM.
Table 96: S500 module DC532 LEDs
LED
I0...I7 (see No. 1
in the following
figure)
I8...I15 (see No. 2
in the following
figure)
C16...C23 (see
No. 3 in the fol-
lowing figure)
2018/09/24
The error codes that are transferred by the replacement device via the CS31
bus bus are newly displayed in CODESYS. Each error code of the CS31 bus
(table column 3) produces the error code in CODESYS (table column 2). As a
result, it is possible to operate the replacement device with a new control
system (PLC/control unit), e.g. 07KT98-ARC-AD, as well as with an old control
system (PLC/central unit), e.g. 07KT98.
Status Color LED off
Voltage supply Gree
n
CS31 bus com- Gree
munication n
Error Red
I/O bus commu- Gree
nication n
Status Color
Digital Yellow
inputs
Digital Yellow
inputs
Digital Yellow
outputs
3ADR010122, 8, en_US
Replacement devices: I/O modules > Replacement unit DC501-CS31-AD
LED on
No internal supply Internal supply
voltage voltage
No CS31 bus com- CS31 bus bus
munication communication
No error Static error
(must be con-
firmed by the
control system)
No I/O bus commu- I/O bus com-
nication munication
LED off LED on
Input is not Input is activated (input
activated voltage is indicated
even if supply is
switched off)
Input is not Input is activated (input
activated voltage is indicated
even if supply is
switched off)
Output is not Output is activated
activated
AC31 Adapters
LED flashes
-
Only diagnosis, no
data transfer. Trans-
mission is disturbed.
No CS31 bus con-
nection or activity
Error I/O bus com-
munication
Ä Chapter 1.3 "System
LED flashes
-
-
-
151