IMR02F04-E1
i-4
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4.2 Function Code ............................................................................................... 29
4.3 Communication Mode .................................................................................... 29
4.4 Slave Responses ........................................................................................... 30
4.5 Calculating CRC-16 ....................................................................................... 31
The flow chart of CRC-16 ............................................................................................ 32
Example of a CRC calculation in the 'C' language ...................................................... 33
4.6 Register Read and Write ............................................................................... 34
4.6.1 Read holding registers [03H] .................................................................................... 34
4.6.2 Preset single register [06H] ...................................................................................... 35
4.6.3 Diagnostics (Loopback test) [08H] ........................................................................... 36
4.6.4 Preset multiple registers [10H] ................................................................................. 37
4.7 Caution for Handling Communication Data ................................................... 38
4.8 How to Use Modbus Data Mapping ............................................................... 39
4.9 Modbus Data Mapping Address .................................................................... 40
Register address for data mapping ............................................................................. 40
Register address for data read/writes .......................................................................... 41
5. COMMUNICATION DATA LIST ......................................... 42
5.1 Reference to Communication Data List ......................................................... 42
5.2 Communication Data List (RKC communication/Modbus) ............................. 44
Gain setting and linearizing type (Only our pressure sensor CZ-100P/CZ-200P) ....... 53
5.3 The communication data which will be initialized or changed,
if the communication data are changed ......................................................... 54
The communication data which will be initialized if the Input type is changed ............ 54
The communication data which will be initialized if the Display unit is changed .......... 55
The communication data which will be initialized if the Alarm type is changed ........... 56
The communication data which will be automatically converted
if the Input decimal point position is changed .............................................................. 57
The communication data which will be automatically converted
if the Gain setting decimal point position is changed ................................................... 57
The communication data which will be automatically converted
if the Pressure display high/low are changed .............................................................. 58
6. TROUBLESHOOTING ........................................................ 59
RKC communication .................................................................................................... 59
Modbus ....................................................................................................................... 60
7. ASCII 7-BIT CODE TABLE ................................................ 61