Appendix E. Reference; Appendix E.1. Data Types; Appendix E.2. Single Writes - FieldServer FS-8700-01 Driver Manual

FS-8700-01 Modbus RTU/ASCIIFS-8700-01_Modbus_RTU Driver Manual

Appendix E. Reference

Appendix E.1. Data Types

If Node parameter Address_Type is set as ADU or PDU, then Data_Type must be specified as follows
For Address_Type ADU :
Address range Data_Type
1 - 65536 Coil
1 – 65536 Discrete_Input
1 – 65536 Input_Register
1 - 65536 Holding_Register
For Address_Type PDU :
Address range Data_Type
0 - 65535 FC01
0 – 65535 FC02
0 – 65535 FC04
0 – 65535 FC03
For Address_Type Modicon_5digit
When a Modbus address range is specified, a particular Data Type is implied. The defaults are as follows:
Address range Data_Type
40001 - 49999 Register
30001 - 39999 Analog_Input
10001 - 19999 Digital_Input
00001 - 09999 Coil

Appendix E.2. Single Writes

For pure write operations where the function = WRBC or WRBX, the driver defaults to using Function Codes 15 and
16 (Multiple writes). It is possible to force the driver to use Function Codes 5 and 6 (Single Writes) by manipulating
the Data_Type parameter as follows:
For Address_Type ADU:
Address range Data_Type
1 - 65536 Single_Coil
1 - 65536 Single_Register l
For Address_Type PDU:
Address range Data_Type
0 - 65535 FC05
0 - 65535 FC06
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Function Code (Write)
15
n/a.
n/a.
16
Function Code (Write) Function Code (Read)
15 1
n/a. 2
n/a. 4
16 3
Function Code (Write)
16
n/a.
n/a.
15
Function Code (Write)
5
6
Function Code (Write)
5
6
Function Code (Read)
1
2
4
3
Function Code (Read)
3
4
2
1
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