F_Rcvbo - Siemens SIMATIC S7 F Manual

Fail-Safe Blocks
8.3.2

F_RCVBO

Function
This block safely receives 20 data items of the F_BOOL data type sent by the
F_SENDBO block from another CPU.
The received data is stored at the outputs RD_BO_xx for further processing by
other blocks.
The data is transferred via safety frames.
Startup Characteristics
After a startup (cold restart or warm restart), communication must first be
established between the communication partners. As long as the recipient does not
receive a safety frame from the sender, it sets the output SUBS_ON and outputs
the substitute values at the outputs RD_BO_xx.
The substitute values can be stored at the inputs SUBBO_xx.
I/Os
Name
Inputs: ID
R_ID
CRC_IMP
TIMEOUT
ACK_REI
SUBBO_00
...
SUBBO_19
Outputs: ACK_REQ
ERROR
SUBS_ON
RD_BO_00
...
RD_BO_19
RETVAL
Fail-Safe Systems
A5E00085588-03
Data Type Explanation
WORD ID addressing parameter
DWORD R_ID addressing parameter
DWORD Address reference CRC
F_TIME Monitoring time in ms for vital-
sign monitoring
F_BOOL Acknowledgment for
reintegration of process values
after transmission errors
F_BOOL Substitute value for receipt
data 00
...
F_BOOL Substitute value for receipt
data 19
BOOL Acknowledgment for
reintegration of process values
required
F_BOOL Transmission error
F_BOOL Substitution values are output 1
F_BOOL Receipt data 00
...
F_BOOL Receipt data 19
WORD Error code
Default
0000
00000000
Supplied
automatically
T#0 ms
0
0
0
0
0
0
0
0000
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