Siemens SIMATIC NET CP 142-2, Manual, Page: 67 / 84

B8976111/02 AS-i Master Module CP 142-2
6-1
6 Error Indicators on the CP 142-2 / Dealing with Errors
The following table lists the possible causes of errors that can occur when operating the CP 142-2
and how to remedy the problem.
Error Possible Cause Remedy
APF indicator lit. The AS-i power supply unit is not
connected or is defective. Check the connection of the AS-i power
supply unit; if necessary replace the
power supply unit.
Power requirements of the AS-i
slave too high.
Result: Voltage on the AS-i cable
too low Check the power requirements of the
AS-i slaves.
Short circuit on the AS-i cable Check the AS-i cable and the connected
slaves.
SF lights up without pressing the
button. The CP 142-2 is in the protected
mode and an AS-i configuration
error has occurred (for example
slave failure). Eliminate the configuration error.
The CP is in the online phase (for
example after an FC “ASI_3422”
call) Change the CP to the normal mode (FC
call)
The CP is defective. Internal
EEPROM fault Replace the CP.
SF is lit when the SET button is
pressed. An AS-i slave with address 0 exists
when there is a change to the
protected mode. Remove the AS-i slave with address 0
from the AS-i cable.
CER LED is permanently lit. The CP 142-2 has not yet been
configured. Configure the CP using the mode button
on the front panel.
A configured AS-i slave has failed
(evaluate “ACTIVE SLAVES”
display). Replace the defective As-i slave or
configure the CP 142-2 again if the AS-i
slave is not required.
An unconfigured As-i slave was
connected to the AS-i cable. Remove the As-i slave or reconfigure the
CP 142-2.
An AS-i slave has been connected
whose configuration data (I/O
configuration, ID code) do not
match the values of the configured
slaves. Check whether the wrong AS-i slave has
been connected. If necessary,
reconfigure the CP 142-2.
CER display flickers, in other
words a configured AS-i slave is
lost sporadically. Bad contact Check the electrical connections of the
AS-i slaves.
Interference on the AS-i cable. Check the correct grounding of the
ET 200X and check the AS-i cable.
Check that the shield of the AS-i power
supply unit is connected correctly.
The CP does not switch from the
configuration mode to the
protected mode. Button not pressed long enough Press the button for at least 5 seconds.
An AS-i slave with address 0 is
connected to the AS-i cable. The
CP 142-2 cannot change to the
protected mode as long as this AS-i
slave exists. Remove the AS-i slave with address 0.