Siemens SIMATIC MV500, Operating Instructions Manual, Page: 203 / 294

Process interfacing via an automation system (PLC, PC)
9.6 Control via TCP/IP and RS232
SIMATIC MV500
Operating Instructions, 03/2021, C79000-G8976-C494-05
203
Response string
"RTRDY<endekennung>" (Reply sTore program ReaDY)
Table 9- 59 String structure
Characters Description
<endekennung> - Non-printable ASCII character with the value "0x04".
After this response string is received, a trigger can be sent via an external source.
Note the following:
•
If this response string is not sent, either the DISA bit has not been set or <program no> is
outside the valid range.
• If "RTRDY" is received and the trigger is sent, the status must be queried cyclically with
"MGST". The query is used to check whether the save procedure is completed.
• When the save procedure is completed, the optical reader will be in processing mode with
<program no>.
• If the optical reader is not in processing mode and there is no error state, the save
procedure is not yet finished or it is still waiting for the trigger signal.
Once the save procedure is completed, the DISA bit is reset.
The save procedure can be canceled with "Reset command (Page 204)" (upon receipt of
"RTRDY").
Example sequence
Table 9- 60 Example sequence of a command execution
Send
(string)
Receive
(string)
Description
MDIH -- Set DISA bit.
MGST -- Status query
If there is no error, the saving process can be
started.
-- RGST ...
MT05 -- Start the save procedure.
-- RTRDY Wait for acknowledgment.
T -- Trigger with the standard trigger text
Trigger source = Control source.
Note: Triggering is also possible via DI/DQ, for
example.