6.2.15  Entering fieldbus parameters using front-panel keys ........................................ 136
 6.2.16  Displaying system information .............................................................................. 137
 6.2.17  Printing configuration data .................................................................................... 138
 6.3  Other functions via keypad .................................................................................................. 138
 6.3.1  Testing the front-panel keys .................................................................................... 138
 6.3.2  Testing digital inputs ................................................................................................ 139
 6.3.3  Testing digital outputs .............................................................................................. 140
 6.3.4  Testing the RS-232 interface .................................................................................... 141
 6.3.5  Testing the RS-485 interface .................................................................................... 142
 6.3.6  Testing the analog output ........................................................................................ 142
 7  ModBus protocol ....................................................................................................................... 144
 7.1  General description ............................................................................................................... 144
 8  SMA protocol .............................................................................................................................. 145
 8.1  General description ............................................................................................................... 145
 9  Fieldbus interface ...................................................................................................................... 146
 9.1  General notes ......................................................................................................................... 146
 9.2  Scale protocol ......................................................................................................................... 146
 9.2.1  Data exchange range ................................................................................................ 147
 9.2.2  Reading and writing data with function numbers ................................................ 151
 9.2.3  Reading and writing bits directly ............................................................................ 153
 9.2.4  Waiting for the result of the action ........................................................................ 155
 9.2.5  Function numbers ..................................................................................................... 156
 9.2.6  Example: reading the gross weight ........................................................................ 166
 9.2.7  Special note for DeviceNet and EtherNet/IP ......................................................... 168
 10  SPM ............................................................................................................................................ 169
 10.1  General notes ....................................................................................................................... 169
 10.2  Elementary data types ........................................................................................................ 169
 10.3  Addressing ............................................................................................................................ 170
 10.4  System data .......................................................................................................................... 171
 11  Error messages ........................................................................................................................ 174
 11.1  Error messages measuring circuit ..................................................................................... 174
 11.2  General error messages ..................................................................................................... 175
 11.3  Error numbers @ "LAST_ERROR" ....................................................................................... 177
 11.3.1  Weighing point errors ............................................................................................ 177
 12  Maintenance/repairs/cleaning .............................................................................................. 178
 12.1  Maintenance ......................................................................................................................... 178
 12.2  Repairs ................................................................................................................................... 178
 12.2.1  Battery for date/time .............................................................................................. 178
 12.2.2  Replacing the battery for date/time ..................................................................... 179
 12.3  Solder work ........................................................................................................................... 179