Siemens SITRANS Series - Page 7

9.3.7 Diagnostics functions...........................................................................................................149
9.3.7.1 Limit monitoring and event counter......................................................................................149
9.3.7.2 Trend log..............................................................................................................................152
10 Functional Safety......................................................................................................................................153
10.1 Safety concept.....................................................................................................................153
10.1.1 Random and systematic errors............................................................................................153
10.1.2 SIL-compliant product version..............................................................................................153
10.1.3 Safety function.....................................................................................................................154
10.1.3.1 Device statuses....................................................................................................................156
10.1.3.2 Safety parameters................................................................................................................156
10.1.4 Operating modes of the device............................................................................................157
10.1.5 Device mode........................................................................................................................157
10.1.5.1 Validation.............................................................................................................................158
10.1.5.2 Safety-related parameters....................................................................................................159
10.1.5.3 Device mode "Functional Safety enabled"...........................................................................159
10.2 Enabling Functional Safety..................................................................................................160
10.2.1 Enabling Functional Safety over device with display...........................................................160
10.2.2 Enabling Functional Safety over remote operation..............................................................163
10.3 Acknowledging safety-related errors....................................................................................168
10.3.1 "Safety critical error" device mode.......................................................................................168
10.3.2 Acknowledging safety-related errors via remote operation..................................................169
10.4 Disabling Functional Safety over device with display...........................................................170
10.5 Disabling Functional Safety over remote operation.............................................................171
10.6 Proof test..............................................................................................................................172
10.6.1 Intervals and rules for proof test...........................................................................................172
10.6.2 Documenting a proof test.....................................................................................................173
10.7 Repair and service...............................................................................................................173
11 Service and maintenance.........................................................................................................................175
11.1 Basic safety instructions.......................................................................................................175
11.2 Cleaning...............................................................................................................................176
11.2.1 Cleaning the enclosure........................................................................................................176
11.2.2 Servicing the remote seal measuring system......................................................................176
11.3 Maintenance and repair work...............................................................................................177
11.3.1 Defining the maintenance interval........................................................................................177
11.3.2 Checking the gaskets...........................................................................................................178
11.3.3 Check cable glands..............................................................................................................179
11.4 Return procedure.................................................................................................................180
11.5 Disposal...............................................................................................................................180
12 Diagnostics and troubleshooting..............................................................................................................181
12.1 Device status symbols.........................................................................................................181
12.2 Diagnostic messages...........................................................................................................184
12.3 Troubleshooting...................................................................................................................190
12.3.1 Troubleshooting Functional Security....................................................................................190
Table of contents
SITRANS P320/P420 (mA/HART)
Operating Instructions, 06/2018, A5E44852162-AA 7