Safety Manual - Tuv-fs.com

More documents

Recommendations

Info

2.4 SecurityTo prevent accesses from unauthorized users or devices during the operation and unintendedchanges due to user's operation errors, consider the security mentioned in this section.• SCS security levelThe SCS controls the security levels for the safe operation of the system.Set the security level to Level 2 during the normal operation of SCS to protect the SCSagainst illegal access. It needs to be set to Level 1 for maintenance, and to Level 0 for off-lineoperation. To prevent erroneous changes of the security level, password authorization is required.Assign different passwords for authorization to individual security levels and SCSs. Checkthat the security level on the display of SENG is correct when changing the security level.• Access to SCSChanging the security level enables SCS to be accessed. To prevent erroneous access toSCS, correct operation on SENG is needed. For this purpose, SENG is provided with the displayof the system alarms and SCS status to indicate which part of SCS is to be accessed.When accessing SCS, use these functions to ensure the correct access for its safe operation.• Access control on SENGThe safety application is protected with a password, so that only authorized users are allowedto operate and modify it. The passwords for operating the safety application need to be differentfor each SCS.• Check list for securityTable 2.4-1 Check list for securityNo. Description Check1 Is the usage of the SCS Security Levels understood?2Have different passwords for changing SCS Security Levels been assigned to individualsecurity levels and individual SCSs?3 Has the Security Level of the SCS in operation been set to Level 2?45 2-10Performing operations on SCS, have you confirmed that the settings and the state ofSCS are the same as you intended?Have different passwords for operating safety application on the SENG been assignedto individual SCSs?IM 32Q01S10-31E2nd Edition : Dec.28,2012-00
2.5 Online changeProSafe-RS allows the application to be modified, I/O modules to be added or removed, andthe I/O module settings to be changed online.Before Online Change, analyze its impact on the system, provide external measures whennecessary or appropriate, and then execute it with much caution.• Online change considerationAfter modifying the application and <strong>com</strong>pleting the check, you need to perform Online ChangeDownload and test the modified part. Before Online Change Download, change the SCS SecurityLevel to Level 1, and return it to Level 2 after <strong>com</strong>pletion of the test.To prevent a system error, Online Change Download must not be performed while maintenanceoverride operation by HIS is going on.If the modified application contains any unintended changes, Online Change can lead to unexpectedsystem behavior. To prevent adverse influence on the parts outside of SCS causedby the unexpected behavior, use the Forcing Function, and also provide appropriate measuresoutside of SCS to deal with emergency situations in advance.For the detailed procedure for Online Change, refer to Engineering Guide (IM32Q01C10-31E)• Check list for online changeTable 2.5-1 Check list for online changeNo. Description Check1 Has the plan of modification been reviewed and approved?2 Does the modification need to be done online?3Has the impact of the online change on the system been analyzed and the results fullyunderstood?4 Are the Integrity Analyzer and Cross Reference Analyzer used for change verification?5 Has the Forcing Function or Fixing All Output Function been taken into account?6 Have adequate measures for emergency situations been prepared outside SCS?7 Has the procedure for the online change been clearly established? 2-11IM 32Q01S10-31E2nd Edition : Dec.28,2012-00
Page 1 and 2: User'sManualSafety ManualIM 32Q01S1
Page 3: ProSafe-RS Document MapiiSafety Sys
Page 6 and 7: Documentation Conventionsv• Symbo
Page 8 and 9: Copyright and Trademark Noticesvii
Page 10 and 11: TocApp.-1Safety ManualIM 32Q01S10-3
Page 12 and 13: 1-2Another requirement of the funct
Page 14 and 15: 2.1 Overview of ProSafe-RSThis sect
Page 16 and 17: 2-4Interference free I/O moduleEthe
Page 18 and 19: 2-6No. Description Check3 Has the m
Page 20 and 21: applications, but the others cannot
Page 24 and 25: 2.6 ForcingThis section explains th
Page 26 and 27: 2.8 Replacement of modules in SCSTh
Page 28: Revision InformationRev-1Title: Saf

Safety Manual - Tuv-fs.com

Create successful ePaper yourself

Delete template?

Save as template?