Rules for Failsafe Operation of an S5-95F
S5-95F
18.3
Operating Modes
The S5-95F differentiates between three different operating modes:
•
Safety mode
•
Test mode
•
Quasi-safety mode
Safety Note
Whenever the process controller carries out safety functions, the S5-95F must operate
in safety mode". The "Test" and "Quasi-safety" modes are for the exclusive purpose of
testing the user program.
A detailed description of the operating modes can be found in section 2.5.2.
18.4
Entering the System Identification and ID Number in the System
Event DB
Product Identification
Each basic unit has the product identification code "095F
H
" in DW 0 of the system event DB. Do
not change this code.
System ID Number
Whenever you use several S5-95Fs in your installation and operate them with different user
programs, there is always the possibility of a mix-up in the EPROM submodules. To avoid mistakes,
a unique system ID number can be defined for each S5-95F. This ID number must be entered in
DB1 with the COM 95F software when the system parameters are initialized.
In the safety mode, the operating system reads the system ID number from DB1 and transfers it to
data word DW 1 of the system event DB. From this point on, the S5-95F accepts only EPROM
submodules with this system ID number. You can erase a chosen number by executing a manual
overall reset.
Safety Note
When using system ID numbers, always remember that
•
the system ID number may not be zero
•
a manual overall reset sets the system ID number to zero
18-12
EWA 4NEB 812 6210-02
