Rules Governing the Use of the S5-115F
S5-115F Manual
10.20.2 Pre-Inspection
The following documents specifying system, version and date are usually required for the pre-
inspection:
•
Component mounting diagrams of the hardware
•
Configuration printout with COM 115F DOCUMENT on a data medium and as a listing
•
Logic and signal flow diagrams
•
Control program, program sequence diagrams, program overview with data blocks on data
media and as listings
•
Cross-reference list for inputs, outputs, flags, timers, counters, blocks and I/O modules
•
Certification conditions
As well as confirming that the conditions of inspection have been met, the pre-inspection also
deals with the following points:
Checking of operating system parameters
Use a printout with COM 115F to demonstrate that all safety-related parameters are set in such a
way as to meet the safety requirements.
Which parameters are taken into account here will depend on the special requirements of the
system.
The monitored maximum scan time must meet the requirements of the process.
Checking of the configured hardware
The inspector uses the component mounting diagrams and the configuration printout to check
that all safety-related inputs and outputs have been switched in a failsafe manner. This affects
both input modules and output modules as well as sensors and actuators.
Checking the control program
The inspector checks the control program using the program listing, the sequence diagrams and
the logic plans.
Among the points checked are the following:
•
Correct conversion of logic diagrams
•
Initialization of the integral blocks
•
Initialization of standard function blocks
•
Failsafe feature of outputs, timers and counters
Outputs, timers and counters are regarded as failsafe if the input parameters used are failsafe
or if a fault prognosis has been performed. The purpose of a fault prognosis is to establish that
the failure of a non-failsafe input parameter could under no circumstances result in a
hazardous state.
Checklist for system check
Generate a checklist for the system check. The following are among the points to be included:
•
Function tests for safety-related functions
•
The conditions of inspection to be observed
•
Protection targets
•
The verifiable regulations for the automated process
10-72
EWA 4NEB 811 6148-02
