vi
Figure 48: Alarm condition indicated (Sensor) ....................................................................................................... 70
Figure 49: Operator menu, diagnostics screen ...................................................................................................... 70
Figure 50: Sensor alarm detail screen ................................................................................................................... 70
Figure 51: Transmitter power connections ............................................................................................................. 74
Figure 52: RS-485 communication wiring .............................................................................................................. 77
Figure 53: HMI display .......................................................................................................................................... 79
Figure 54: DIP switches ........................................................................................................................................ 84
Figure 55: Steam or clean liquid flow measurement (transmitter and manifold) ...................................................... 95
Figure 56: Level measurement on a closed tank with dry leg ................................................................................. 96
Figure 57: Level measurement on a closed tank with wet leg ................................................................................. 97
Figure 58: Examples of gas and dust application zone separations........................................................................ 99
List of Tables
Table 1: Transmitter subassemblies ........................................................................................................................ 6
Table 2: 266 Transmitter specifications ................................................................................................................... 7
Table 3: Differential pressure specifications ............................................................................................................. 9
Table 4: Static pressure specifications..................................................................................................................... 9
Table 5: RTD input specifications .......................................................................................................................... 10
Table 6: RTD element errors ................................................................................................................................. 10
Table 7: MODBUS
®
RTU message frame format ................................................................................................... 11
Table 8: Bit sequence in RTU mode (with parity checking) .................................................................................... 13
Table 9: Bit sequence in RTU mode (with no parity) .............................................................................................. 13
Table 10: Pre-installation checklist ........................................................................................................................ 16
Table 11: Model number configuration................................................................................................................... 18
Table 12: Communication parameters ................................................................................................................... 36
Table 13: Replacement parts list ........................................................................................................................... 44
Table 14: Calibration menu ................................................................................................................................... 59
Table 15: Device menu ......................................................................................................................................... 65
Table 16: Diagnostic code cause and action .......................................................................................................... 71
Table 17: Communication parameters ................................................................................................................... 76
Table 18: HMI menu structure ............................................................................................................................... 80
Table 19: DIP switch states ................................................................................................................................... 85
Table 20: ABB transmitter register map ................................................................................................................. 86
Table 21: Rosemont MODBUS
®
register map ........................................................................................................ 92
Table 22: Temperature class definitions .............................................................................................................. 102
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