Siemens Error Displays of the CP 243-2 / Remedying Errors, Possible Cause Remedy

Dealing with Problems / Error Displays

6.2Error 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

APF LED lit

Possible Cause	Remedy
The AS-Interface power supply	Check the connection of the AS-
unit is not connected or is defec-	Interface power supply unit; if ne-
tive.	cessary replace the power supply
	unit.

SF lights up without pressing the SET button.

SF is lit when the SET button is pressed.

CER is lit permanently.

Power requirements of the AS-In- terface slaves are too high. Re- sult: The voltage on the AS-Inter- face cable is too low.

Short-circuit on the AS-Interface cable.

The CP 243-2 is defective. Inter- nal EEPROM error.

An AS-Interface slave with ad- dress 0 exists when there is a change to the protected mode.

The CP 243-2 has not yet been configured.

A configured AS-Interface slave has failed (evaluate the slave dis- play).

Check the power requirements of the AS-Interface slaves. If neces- sary, supply the slaves with power externally.

Check the AS-Interface cable and the attached slaves.

Replace the CP 243-2.

Remove the slave with address 0 from the AS-Interface cable.

Configure the CP 243-2 using the mode button on the front panel.

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.

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.

Remove the AS-Interface slave or reconfigure the CP 243-2 .

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.

Noise affecting the AS-Interface cable.

Check the electrical connections of the AS-Interface slaves.

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.

SIMATIC NET CP 243-2 AS-i Master	6-3
C79000-G8976-C142/02