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There is an Ethernet connection between the PROFINET interface of your PROFINET device
and a communication partner.
LED flickers yellow
Data is currently being received from or sent to a communications partner on Ethernet via
the PROFINET interface of the PROFINET deviceThe following tables explain the meaning of the status and error displays. Corrective
measures for diagnostic alarms can be found in the section Interrupts and diagnostics of the
analog on-board I/O (Page 119).
Table 6- 3 RUN/ERROR status and error displays
LEDs Meaning Remedy
RUN ERROR
Off Off
No voltage or voltage too low. • Turn on the CPU and/or the system power
supply modules.
Flashes Off
Analog on-board I/O starts up and flashes until
valid parameter assignment.
---
On Off
Parameters have been set for the analog onboard
I/O.
On Flashes
Indicates module errors (at least one error is
present on one channel, e.g. wire break).
Evaluate the diagnostics and eliminate the error
(e.g. wire break).he analog on-board I/O stored by the production. The yellow MAINT LED lights
up if the firmware detects an inconsistency (e.g. an invalid value) or missing calibration data.
The MAINT LED is located next to the red ERROR LED on the analog on-board I/O.
Note that the MAINT LED on the analog on-board I/O is only intended for troubleshooting by
. In normal conditions, the MAINT LED should not light up. However, if this is the
case, please contact "mySupport" on the Possible for the voltage measuring range (1 to 5 V), current measuring range (4 to 20 mA)
2) Possible for current output type
3) Possible for voltage output type
Hardware interrupt for inputs
The compact CPU can generate a hardware interrupt for the following events:
● Below low limit 1
● Above high limit 1
● Below low limit 2
● Above high limit 2
You can find detailed information on the event in the hardware interrupt organization block
with the "RALARM" (read additional interrupt information) instruction and in the STEP 7 (TIA
Portal) online help.If the two high limits 1 and 2 are reached at the same time, the analog on-board I/O always
signals the hardware interrupt for high limit 1 first. The configured value for high limit 2 is
irrelevant. After processing the hardware interrupt for high limit 1, the compact CPU triggers
the hardware interrupt for high limit 2.
The analog on-board I/O behaves accordingly when the low limits are reached
simultaneously. If the two low limits 1 and 2 are reached at the same time, the analog onboard
I/O always signals the hardware interrupt for low limit 1 first. After processing the
hardware interrupt for low limit 1, the analog on-board I/O triggers the hardware interrupt for
low limit 2.A diagnostics alarm is output for each diagnostics event and the ERROR LED flashes on the
analog on-board I/O. The diagnostics alarms can, for example, be read out in the diagnostics
buffer of the CPU. You can evaluate the error codes with the user program.
Table 6- 10 Diagnostics alarms, their meaning and corrective measuresResistance of encoder circuit too
high