Fail-Safe Blocks
Fail-Safe Systems
A5E00085588-03
8-29
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 Data Type Explanation Default
Inputs:
ID WORD ID addressing parameter 0000
R_ID DWORD R_ID addressing parameter 00000000
CRC_IMP DWORD Address reference CRC Supplied
automatically
TIMEOUT F_TIME Monitoring time in ms for vital-
sign monitoring
T#0 ms
ACK_REI F_BOOL Acknowledgment for
reintegration of process values
after transmission errors
0
SUBBO_00 F_BOOL Substitute value for receipt
data 00
0
... ...
SUBBO_19 F_BOOL Substitute value for receipt
data 19
0
Outputs:
ACK_REQ BOOL Acknowledgment for
reintegration of process values
required
0
ERROR F_BOOL Transmission error 0
SUBS_ON F_BOOL Substitution values are output 1
RD_BO_00 F_BOOL Receipt data 00 0
... ...
RD_BO_19 F_BOOL Receipt data 19 0
RETVAL WORD Error code 0000
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