Modbus / TCP connection - PR-43-AC - PR-43-AP - PR-43-GC - PR-43-GP - PR-43-PC

The MI has a built-in Modbus / TCP server that provides measurement data for connected clients. Clients can connect and read the Modbus registers by using function code 3. Each active MI app updates its registers that depend on app type. The following tables list the registers.

The following table lists the Modbus registers of a Refractometer app. The register address n is the appslot number.

Table 1. Refractometer app Modbus registers

Name	Address	Type	Function
Status	n032	32-BYTE STRING	Refractometer status message
Conc	n050	FLOAT	Final concentration value
Temp	n052	FLOAT	Process temperature
Calc	n054	FLOAT	Calculated concentration value
nD	n056	FLOAT	Calculated refractive index value
S/N	n098	32-BYTE STRING	Refractometer serial number
Ext wash	1n000	4-BYTE INT	External wash request input

The external wash request includes a state machine to prevent continuous wash triggering that would wear out the sensor, so there must be a resetting value (zero) between each wash triggering values (ones).

The following table lists the Modbus registers of a Recipe app. The register address n is the appslot number.

Table 2. Recipe app Modbus registers

Name	Address	Type	Function
Status	n032	32-BYTE STRING	Refractometer status message
Conc	n050	FLOAT	Final concentration value
Temp	n052	FLOAT	Process temperature
Calc	n054	FLOAT	Calculated concentration value
nD	n056	FLOAT	Calculated refractive index value
S/N	n098	32-BYTE STRING	Refractometer serial number
Ext wash	1n200	4-BYTE INT	Recipe identification number input