Chapter 10 Deployment CPU 21xSER-2 Manual VIPA CPU 21x
10-14 HB103E - Rev. 05/45
Interface communication
The communication happens via the following handling blocks in the OB1:
No. Designator
SFC 230 SEND Initialize a send order
SFC 236 SEND-ALL Send user data
SFC 231 RECEIVE Initialize a receive order
SFC 237 RECEIVE-ALL Receive user data
SFC 233 CONTROL Block for communication control
SFC 234 RESET Deletes all orders and activates new
parameters
Cycle OB1:
• Create SEND and RECEIVE orders for send and receive initialization
• Create SEND ALL and RECEIVE ALL orders for user data transfer
The following section contains a summary of this blocks. More detailed
information is to find in the chapter "Integrated OBs, SFBs, SFCs".
The SEND block serves the initialization of a send order to a CP.
Please regard that a send order is only executed when the following
conditions are met:
• the SEND has received a VKE "1"
• the Bit "order in process" in the indicator word has been reset
Overview
SFC 230 - SEND
Parameter
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