Fault Indications/Fault Remedies - Siemens SIMATIC ET 200SP Manual

Alarms, faults and system events

8.8 Fault indications/fault remedies

8.8 Fault indications/fault remedies
Fault indications/remedies for faults on the CM AS-i Master ST
Below are possible fault indications during operation of the AS-i master and potential
remedial measures.
Table 8- 9 Fault indications and remedies for faults on the AS-i Master
Fault
"AS-i fault" LED lights up red
"DIAG" LED not lit
"DIAG" LED flashes green, but does
not switch to constant green light
"CER" LED is lit.
"CER" LED flashes erratically , i.e. a
configured AS-i slave fails sporadically.
The AS-i master does not switch from
"configuration mode" to "protected
operation".
STEP 7
In it is not possible to switch
between "configuration mode" and
"protected operation"
80
Possible cause
The current consumption of the
AS-i slaves is too high. Result: Voltage
on the AS-i cable is too low.
No voltage is present on the AS-i cable
or the voltage is too low.
Short-circuit on the AS-i cable
There is no supply over the
communications bus.
The AS-i master is not configured.
A configured AS-i slave has failed.
Evaluate the slave indication.
•
A non-configured AS-i slave was
connected to the AS-i cable.
An AS-i slave has been connected
whose configuration data, e.g., IO
code, ID codes, does not match the
values of the configured AS-i slave.
Loose connection
Injection of interference on the
AS-i cable.
The connected sensor is causing an
overload.
An AS-i slave with address 0 is
connected to the AS-i cable.
The AS-i master is unable to switch to
"protected operation" as long as this
slave is connected.
The automation system is in the "RUN"
state.
AS-Interface master CM AS-i Master ST (3RK7137-6SA00-0BC1)
Remedy
Check the current consumption of the
AS-i slaves.
Check the connection with the AS-i
power supply unit.
Check the AS-i cable and the
connected AS-i slaves.
Check whether the module is inserted
correctly.
Configure the AS-i master in
Replace the defective AS-i slave or
configure the AS-i master again if the
AS-i slave is not required.
Remove the AS-i slave or configure the
AS-i master again.
Check whether an incorrect AS-i slave
has been connected. Configure the
AS-i master again, if necessary.
Check the connections of the
AS-i slaves.
Check that the grounding of the AS-
i master and routing of the AS-i cable
are correct. Check whether the shield
of the AS-i power supply unit is
connected correctly.
Check the sensor and the sensor cable
for damage.
Remove the AS-i slave with address 0
or set the correct address using the
AS-i addressing device.
Switch the automation system to the
"STOP" state.
Manual, 07/2017, A5E02655262020A/RS-AD/004
STEP 7
.