Coil/ Register numbers Data addresses Function type Table name
10001-19999 0 to 65535 2 Read Inputs
30001-39999 0 to 65535 4 Read Input Registers
40001-49999 0 to 65535 3 Read Holding Registers
Coil / register numbers can be considered as location names since they do not appear in the
configuration. The Data Addresses (Start Address) are used in the configuration.
Data Types:
Industrial IoT data types:
Data type Length Data range
BOOLEAN 1 bit True
INT 4 bytes
−2147483648
LONG 8 bytes
−9223372036854775808
DOUBLE 8 bytes -9.9999999999999999999999999999999999999E+125
STRING 1 - 255 bytes
Modbus data types:
Data type Length Data type number
char 8 bits 1
unsigned char 8 bits 2
short 16 bits 3
unsigned short 16 bits 4
long 32 bits 5
unsigned long 32 bits 6
float 32 bits 7
double 64 bits 8
ascii-text 8 bits / char 9
Examples:
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