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.

Table 6-1 Error Displays of the CP 243-2 / Remedying Errors

Error Possible Cause Remedy

The CP 243-2 does not switch from the configuration mode to the protected mode.

The S7-200 CPU is in the “RUN”

mode.

Switch the S7-200 CPU to

“STOP”. This sets the PLC_RUN bit to 0.

The SET button was not pressed long enough.

Press the button for at least 0.5 seconds.

A slave with address “0” is con-nected to the AS-Interface cable.

The CP 243-2 cannot change to the protected mode as long as this slave exists.

Remove the slave with address 0.

The CP 243-2 does not switch from the protected mode to the configuration mode.

The S7-200 CPU is in the “RUN”

mode.

Switch the S7-200 CPU to

“STOP”.

This sets the PLC_RUN bit to ‘0’.

Button not pressed long enough Press the button for at least 0.5 seconds.

After failure of an AS-Interface slave, the “AUP” display remains off.

The CP 243-2 is in the configura-tion mode.

“Automatic programming” is not possible in the configuration mode.

Program the address of the new AS-Interface slave with the ad-dressing unit.

More than one AS-Interface slave has failed.

Check the AS-Interface cable.

If “APF” is displayed at the same time, check the power supply on the AS-Interface cable.

If more than one AS-Interface slave is defective, program the ad-dress on the replaced AS-Inter-face slaves using the addressing unit.

The CP 243-2 has not detected configured AS-Interface slaves.

Remove the unconfigured AS-In-terface slaves from the AS-Inter-face cable.

The AUTO_ADDR_ENABLE flag is not set.

Set the bit with the appropriate commands or by pressing the SET button during AS-i Power Fail.

Table 6-1 Error Displays of the CP 243-2 / Remedying Errors

Error Possible Cause Remedy

Automatic address programming is unsuccessful although the

“AUP” display is lit.

The configuration data (I/O confi-guration, ID codes) of the repla-ced AS-Interface slave do not match the values of the original AS-Interface slave.

Check whether the correct “repla-cement slave” was used.

Compare the information from the manufacturer about configuration data.

If you want to replace the original AS-Interface slave with a different type, assign the address with the addressing unit and reconfigure the CP 243-2 (for example by pressing the SET button).

The replaced AS-Interface slave does not have the address “0”.0

Set the address of the replaced AS-Interface slave with the ad-dressing unit.

Replaced AS-Interface slave is not correctly connected or is de-fective.

Check the connections of the AS-Interface slave and if necessary replace the AS-Interface slave.

The “CER” LED and the LEDs of active AS-Interface slaves flicker irregularly.

An extender is installed in the AS-Interface with “Line1” and “Line2”

connections reversed.

Correct the connections to the ex-tender.