Siemens CP 243-2 - Manual (Page 131)

Dealing with Problems / Error Displays
6-3
SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02
6.2 Error Displays of the CP 243-2 / Remedying Errors
<F 1>The following table lists the possible causes of errors that can occur when
operating the CP 243-2 and how to remedy the problem.
Table 6-1 Error Displays of the CP 243-2 / Remedying Errors
Error Possible Cause Remedy
APF LED lit The AS-Interface power supply
unit is not connected or is defec-
tive. Check the connection of the AS-
Interface power supply unit; if ne-
cessary replace the power supply
unit.
Power requirements of the AS-In-
terface slaves are too high. Re-
sult: The voltage on the AS-Inter-
face cable is too low. Check the power requirements of
the AS-Interface slaves. If neces-
sary, supply the slaves with power
externally.
Short-circuit on the AS-Interface
cable. Check the AS-Interface cable and
the attached slaves.
SF lights up without pressing the
SET button. The CP 243-2 is defective. Inter-
nal EEPROM error. Replace the CP 243-2.
SF is lit when the SET button is
pressed. An AS-Interface slave with ad-
dress 0 exists when there is a
change to the protected mode. Remove the slave with address 0
from the AS-Interface cable.
CER is lit permanently. The CP 243-2 has not yet been
configured. Configure the CP 243-2 using the
mode button on the front panel.
A configured AS-Interface slave
has failed (evaluate the slave dis-
play). Replace the defective AS-Inter-
face slave or configure the
CP 243-2 again if the slave is not
required.
An unconfigured AS-Interface
slave was connected to the AS-In-
terface cable. Remove the AS-Interface slave or
reconfigure the CP 243-2 .
An AS-Interface slave was con-
nected whose configuration data
(I/O configuration, ID codes) do
not match the values of the confi-
gured AS-Interface slave. Check whether the wrong AS-In-
terface slave has been connec-
ted. If necessary, reconfigure the
CP 243-2.
CER display flickers, in other
words a configured AS-Interface
slave is lost sporadically. Bad electrical connection. Check the electrical connections
of the AS-Interface slaves.
Noise affecting the AS-Interface
cable. Check the correct grounding of
the S7-200 and check the AS-In-
terface cable. Check that the
shield of the AS-Interface power
supply unit is connected correctly.