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Chapter 6 Deployment of the CPU 821xDP
Internal status messages to CPU
Status Byte 0
Status Byte 1
6-18
The current status of the Profibus communication procedure is obtainable
from the status messages that are mapped into the peripheral addressing
range of the CPU. Status messages consist of 2Byte with the following
structure:
7
7
0
Bit-No.
Clear Data
0:
Communication processor in normal operation
1:
Receive data cleared
reserved
User Parameter
0:
no valid parameters
1:
parameter data found
Response control (active)
0:
Response control not active
1:
Response control activated by DP master
Status Profibus data transfer
0:
Data transfer error
1:
Data transfer via Profibus active
reserved
0
Bit-No.
Parameterization
0:
valid parameterization
1:
invalid parameter telegram from DP master
Configuration
0:
valid configuration data
1:
no congruence with DB1 parameters
Response control (Watchdog)
0:
Response control is still running
1:
Profibus response control has been executed
Hardware control
0:
Profibus controller VPC3plus is ok
1:
Profibus controller VPC3plus is defect
DP data
0:
Profibus slave waits for parameters from master
1:
Profibus slave is in state Profibus data exchange
reserved
ADAM 8000 Manual CPU 821x – Rev 1.1
CPU ADAM 821x
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