Command Interface
5-3
SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02
Command Sequence
The diagram below shows the following:
How to execute commands in the user program
How the CP 243-2 reacts to a command
Initial status
ASI_COM bit = 0
ASI_RESP bit = 0
Start command
Set ASI_COM bit = 1
Wait for response
ASI_RESP bit = ?
Response data valid
ASI_RESP bit = 1
detected
Evaluate response data
After evaluation, set
ASI_COM = 0
Ready to send command
detected
ASI_RESP bit = 0
detected
AS-i master
(user program)
CP 243-2
(reaction to command)
Receives command
Detects that
response data
were evaluated
Signals command
executed
Sets ASI_RESP = 1
Ready for new command
Sets ASI_RESP = 0
Set command parameter
in the analog output area
Initial status
ASI_COM bit = 0
ASI_RESP bit = 0
Executes command
Figure 5-1
Summary of Contents for SIMATIC NET CP 243-2
Page 4: ...Preface ii SIMATIC NET CP 243 2 AS i Master C79000 G8976 C142 02 ...
Page 8: ...Contents vi SIMATIC NET CP 243 2 AS i Master C79000 G8976 C142 02 ...
Page 128: ...Command Interface 5 60 SIMATIC NET CP 243 2 AS i Master C79000 G8976 C142 02 ...
Page 142: ...Notes on the CE Mark C 2 SIMATIC NET CP 243 2 AS i Master C79000 G8976 C142 02 ...
Page 148: ...Glossary Glossary 4 SIMATIC NET CP 243 2 AS i Master C79000 G8976 C142 02 ...