Siemens SIMATIC ET 200SP Manual page 52

Data exchange between the user program and AS-i slaves
7.2 Transmitting AS-i digital values
Status information for process image with 32 bytes
For a process image that is 32 bytes long, the following information is transferred in byte
n+16 (FW V1.1 and higher):
Table 7- 5 Status information in byte n+16 for a process image that is 32 bytes long:
Bit 7: EFD
Bit 6: CM
Bit 5: CFGOK
Bit 4: DIAG
The status information provides a quick summary diagnosis.
If a process image is 16 bytes long, only the first 16 bytes (byte n to byte n+15) are
transferred.
52
0 = No ground fault detected
1 = Ground fault detected
0 = Master in protected operation
1 = Master in configuration mode
0 = Configuration not OK or slave exists with address 0
1 = Configuration OK
0 = No diagnostics pending
1 = Diagnostics pending. This information is set for the following events:
-The AS-i master is in "offline" mode.
- The AS-i voltage is not OK.
- Multiple addressing was detected.
- An I/O error was detected.
- A configuration error was detected.
- A slave with address 0 exists.
AS-Interface master CM AS-i Master ST (3RK7137-6SA00-0BC1)
Manual, 07/2017, A5E02655262020A/RS-AD/004