Siemens SITRANS FC720 Operating Instructions Manual page 5

15.3.5 Performing autozero ............................................................................................................ 135
15.4 Advanced settings............................................................................................................................. 135
15.4.1 Setting hardware write-protection ........................................................................................ 135
15.4.2 Modbus hardware setting .................................................................................................... 137
15.4.3 PROFIBUS PA hardware setting ......................................................................................... 139
15.4.3.1 Access to Hardware DIP switches ....................................................................................... 139
15.4.3.2 Setting hardware write-protection ........................................................................................ 141
15.4.3.3 Setting the bus address ....................................................................................................... 142
16 Troubleshooting ........................................................................................................................................ 143
16.1 Malfunction of operation.................................................................................................................... 143
16.2 Zero point unstable ........................................................................................................................... 144
16.3 Display deviating ............................................................................................................................... 144
17 Maintenance and repair ............................................................................................................................ 147
17.1 Exterior cleaning ............................................................................................................................... 148
17.2 Recalibration and calibration service ................................................................................................ 148
17.3 Impairment of the display .................................................................................................................. 148
17.4 List of replacement parts................................................................................................................... 148
17.5 Ordering of spare parts ..................................................................................................................... 148
18 Sensor replacement .................................................................................................................................. 150
18.1 Dismantling of the defective sensor .................................................................................................. 150
18.1.1 Connecting interfaces .......................................................................................................... 150
18.1.2 Disconnect remote type sensor ........................................................................................... 151
18.1.3 Disconnect compact type sensor ......................................................................................... 152
18.1.4 Remove defective sensor .................................................................................................... 153
18.2 Installation of the Spare sensor......................................................................................................... 153
18.3 Parameter setting.............................................................................................................................. 153
18.3.1 Relevant settings and parameter storage ............................................................................ 153
18.3.2 Parameter setting procedure ............................................................................................... 154
18.4 Wiring ................................................................................................................................................ 154
18.5 Commissioning.................................................................................................................................. 154
19 Transmitter replacement .......................................................................................................................... 155
19.1 Dismantling of the defective transmitter ............................................................................................ 155
19.1.1 Connecting interfaces .......................................................................................................... 155
19.1.2 Disconnect remote type transmitter ..................................................................................... 156
19.1.3 Remove defective transmitter .............................................................................................. 157
19.1.4 Disconnect compact type transmitter................................................................................... 157
19.1.5 Remove microSD card (transmitter with display only) ......................................................... 159
19.2 Installation of the Spare transmitter .................................................................................................. 160
19.3 Parameter setting.............................................................................................................................. 160
19.3.1 Relevant settings and parameter storage ............................................................................ 160
19.3.2 Setting methods ................................................................................................................... 160
19.3.3 Set up process variable units............................................................................................... 161
19.3.4 Set up sensor relevant and sensor specific parameters ...................................................... 162
19.3.5 Set up customer specific parameters .................................................................................. 163
19.3.6 Set up system related parameters ....................................................................................... 164
19.4 Wiring ................................................................................................................................................ 164
11.09.2023A5E52748387-AA, 2023/09
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