Siemens SIMATIC ET 200SP Manual page 67

"CM" LED
This LED indicates the operating status (Configuration Mode).
Table 8- 7 Meaning of the "CM" LED
CM Meaning
The AS-i master is in "protected operation".
Green OFF
The AS-i master is in "configuration mode".
Green ON
During a firmware update:
Errors have occurred during the firmware update.
Green flashes
"AUP" LED
This LED indicates whether automatic address programming is possible or not.
Table 8- 8 Meaning of the "AUP" LED
AUP Meaning
Automatic address programming is not possible.
This LED is always off in configuration mode.
Green OFF
When the AS-i master is in "protected operation", this LED indicates that automatic address
programming of an AS-i slave is possible. Automatic address programming makes it easier to
replace a defective AS-i slave on the AS-i cable.
Green ON
For more detailed information, refer to Section "Replacing a defective AS-i slave / automatic address
programming (Page 74)".
AS-Interface master CM AS-i Master ST (3RK7137-6SA00-0BC1)
Manual, 07/2017, A5E02655262020A/RS-AD/004
Alarms, faults and system events
8.3 LED statuses
67