KROHNE ALTOSONIC V12 EN User Manual
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CONTENTS
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04/2013 - 4002643502 - MA ALTOSONIC V12 R02 en
ALTOSONIC V12
8.9 Returning the device to the manufacturer..................................................................... 96
8.9.1 General information.............................................................................................................. 96
8.9.2 Form (for copying) to accompany a returned device............................................................ 97
8.10 Disposal ........................................................................................................................ 97
9 Technical data
98
9.1 Measuring principle........................................................................................................ 98
9.2 Transit time measuring principle .................................................................................. 98
9.3 Swirl compensation........................................................................................................ 99
9.4 Multipath ultrasonic flowmeters.................................................................................. 100
9.5 Technical data table ..................................................................................................... 101
9.6 Dimensions and weights .............................................................................................. 105
9.7 Flow table ..................................................................................................................... 110
10 Modbus protocol description and set-up
111
10.1 Introduction ................................................................................................................ 111
10.2 Physical Communication Layer.................................................................................. 111
10.3 Serial transmission format ........................................................................................ 112
10.3.1 ASCII mode........................................................................................................................ 112
10.3.2 RTU mode.......................................................................................................................... 113
10.4 Modbus message framing.......................................................................................... 113
10.4.1 Address Field (Device Address) ........................................................................................ 114
10.4.2 Function Field ................................................................................................................... 114
10.4.3 Data Field .......................................................................................................................... 114
10.4.4 Error checking methods ................................................................................................... 114
10.4.5 Transmission gaps............................................................................................................ 115
10.4.6 Time out............................................................................................................................. 115
10.5 Supported functions ................................................................................................... 115
10.5.1 Function 01: READ COILS ................................................................................................. 116
10.5.2 Function 02: READ DISCRETE INPUTS............................................................................. 116
10.5.3 Function 03: READ HOLDING REGISTERS........................................................................ 117
10.5.4 Function 04: READ INPUT REGISTERS............................................................................. 117
10.5.5 Function 05: WRITE SINGLE COIL .................................................................................... 118
10.5.6 Function 06: WRITE SINGLE HOLDING REGISTER........................................................... 118
10.5.7 Function 08: DIAGNOSTICS............................................................................................... 118
10.5.8 Function 15: WRITE MULTIPLE COILS ............................................................................. 119
10.5.9 Function 16: WRITE MULTIPLE HOLDING REGISTERS.................................................... 119
10.5.10 Exception responses ....................................................................................................... 120
10.6 Handling of large data types ...................................................................................... 121
10.6.1 Integer (16 bit), Transmit sequence.................................................................................. 122
10.6.2 Long integer (32 bit), Transmit Sequence ........................................................................ 122
10.6.3 Single precision floating point (32 bit), transmit sequence ............................................. 123
10.6.4 Double precision floating point (64 bit), transmit sequence ............................................ 124
10.6.5 Long long (64 bit integer), transmit sequence ................................................................. 125
10.6.6 Maximum number requested items ................................................................................. 125
10.7 Default settings .......................................................................................................... 126
10.8 Modbus register mapping .......................................................................................... 127
10.8.1 Input Registers (read-only): Integer (16-bit); address range 3000-3499 ........................ 127
10.8.2 Holding Registers (read/write): Integer (16-bit); address range 3500-3999 ................... 127
10.8.3 Input Registers (read-only): Long integer (32-bit); address range 5000-5499 ............... 128