7
Dealing with Problems / Error Displays
112
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
7.2
Error Displays/Remedying Errors
The following table lists the possible causes of errors that can occur when
operating the CP 343-2 and how to remedy the problem.
Table 10-1
Error
Possible Cause
Remedy
APF LED lit
Power requirements of the AS-i
slaves are too high. Result: The
voltage on the AS-i cable is too
low.
Check the power requirements of
the AS-i slaves. If necessary, sup-
ply the AS-i slaves with an exter-
nal voltage.
Power requirements of the AS-i
slave too high.
Check the power requirements of
the AS-i slaves. If necessary,
supply the slaves with power
externally.
PWR LED not lit
The CP connection to the
backplane bus is faulty.
Check whether the module is
plugged in correctly.
SF lights up without pressing the
button.
The CP 342−2 is in the protected
mode and an AS-i configuration
error has occurred (for example
slave failure).
Eliminate the configuration error.
The CP is defective. Internal
EEPROM error −> see signaling
S7−300 system diagnostic buffer.
Replace the CP.
SF is lit when the SET button is
pressed.
A slave with address 0 exists
when there is a change to the pro-
tected mode.
Remove the slave with address 0
from the AS-i cable.
CER LED is permanently lit.
The CP 343-2 module has not yet
been configured.
Configure the CP 343-2 module
using the SET button on the front
panel.
A configured AS-i slave has failed
(evaluate the slave display).
Replace the defective AS-i slave
or reconfigure the CP 343-2 mo-
dule if the AS-i slave is not requi-
red.
An unconfigured slave was con-
nected to the AS-i cable.
Remove the AS-i slave or reconfi-
gure the CP 343-2 module.
An AS-i slave was connected
whose configuration data (I/O con-
figuration, ID code) do not match
the values of the configured AS-i
slave.
Check whether the wrong slave
has been connected. If necessary,
reconfigure the CP 343-2.
Short circuit on the AS-i cable
Check the AS-i cable and the con-
nected AS-i slaves.
