Siemens SIMATIC MV320

2 Engineering of the STEP 7 program
Reading QR Codes with SIMATIC MV320 via ET200SP CM PtP
Article ID: 109474684, V2.0, 10/2021
9
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2.2 The "PtPFreeport" Function Block
Function
The "PtPFreeport" function block implements:
• The initialization of the parameters used
• The configuration of the ET 200SP communication module CM PtP
("Port_Config")
• Clearing of the receive buffer in the ET 200SP communication module CM PtP
("Receive_Reset")
• The receive function ("Receive_P2P") and interpretation of the scan codes
This functionality is implemented as a simple sequencer with the following states:
Figure 2-2
1:
START_UP_STATE
2:
CONFIG_STATE
(Port_Config)
3:
DELETE_BUFFER_STATE
(Receive_Reset)
4:
DATA_RECEPTION_STATE
(Receive_P2P)
Init
Wait for
Data
Init = DONE
Configuration =
DONE
Reset =
DONE