Differences Between the S5-95U and the S5-95F
S5-95F
16.2
Parameter Initialization and Programming
16.2.1 Parameter Initialization in DB1
•
DB1 in the S5-95F is more comprehensive than for the S5-95U because more information is
needed for the operating system (such as, for instance, information required for maintaining
redundancy)
•
Automatic recognition of external I/Os
•
The COM 95F software package simplifies the initialization of DB1 parameters
16.2.2 Programming
•
Access to failsafe external I/Os is possible via even addresses only
•
Branching is possible only to the beginning of a string of logic operations
•
Different timer processing than that used for the S5-95U (see section 8.1.4)
•
The LIR, TIR, TNB and TBS operations are restricted in scope (see section 8.3)
•
The operation set which may be used in OB2 is restricted (refer to the subsections in Chapter
12 which deal with interrupt-driven program scanning)
•
The address allocation in the system data area and the meaning of various addresses have
been changed (see section 6.8)
•
All standard function blocks used must be prototype-tested
16.2.3 Integral Function Blocks
In addition to those also used in the S5-95U, the S5-95F has the following two additional integral
function blocks:
•
FB255 for depassivating passivated signal groups
•
FB252 for initializing additional tests
16.2.4 Acceptance Package
•
A special acceptance package has been developed for the S5-95F.
The acceptance package is delivered together with the COM 95F software, and greatly
simplifies acceptance testing of your failsafe system's components (refer to the COM 95F
Manual for details).
16-2
EWA 4NEB 812 6210-02
