Configuring F-Communications Blocks - Siemens SIMATIC PCS 7 Operating Manual

7.3.2

Configuring F-communications blocks

The following fail-safe blocks are available for communication between safety programs on
various CPUs:
Block
F_SENDBO/F_RCVBO
F_SENDR/F_RCVR:
F_SDS_BO
(F Systems V6.0 and high-
er)
F_RDS_BO
(F Systems V6.0 and high-
er)
Requirements
The follow requirements must be fulfilled prior to configuration:
● The S7 connections between the F-CPUs involved must be configured in NetPro.
● Both CPUs must be configured as F-CPUs:
– The password for the F-CPU must be entered.
– The "CPU contains safety program" option must be activated.
Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB
7.3 Configuring fail-safe AS-AS communication
Description
Safe transmission of 20 F_BOOL data type parameters
Safe transmission of 20 F_REAL data type parameters
Fail-safe sending of 32 F_BOOL data type objects to another F-CPU
Fail-safe reception of 32 F_BOOL data type objects from another F-
CPU
Configuring the safety program
97