Siemens SIMATIC S7 F User Manual

Fail-Safe Blocks
Fail-Safe Systems
A5E00085588-03
8-33
8.3.4 F_RCVR
Function
This block safely receives 20 data items of the F_REAL data type sent by the
F_SENDR block from another CPU.
The received data comes to the outputs RD_R_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_R_xx.
The substitute values can be applied at the inputs SUBR_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
SUBR_00 F_REAL Substitute value for receipt
data 00
0
... ...
SUBR_19 F_REAL 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_R_00 F_REAL Receipt data 00 0
... ...
RD_R_19 F_REAL Receipt data 19 0
RETVAL WORD Error code 0000

Siemens SIMATIC S7 F Specifications

General

Brand	Siemens
Model	SIMATIC S7 F
Category	Controller
Language	English