eMBMasterRegInputCB() function

Callback function used if the value of a Input Register is required by the protocol stack. The starting register address is given by \c usAddress and the last register is given by usAddress + usNRegs - 1.

Syntax

Show:

Summary

Declaration

Definition

from mb_m.h:298

eMBErrorCode eMBMasterRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs );

Implemented in esp_modbus_master.c:227

Arguments

Argument

Description

pucRegBuffer

A buffer where the callback function should write the current value of the modbus registers to.

usAddress

The starting address of the register. Input registers are in the range 1 - 65535.

usNRegs

Number of registers the callback function must supply.

Return value

The function must return one of the following error codes: - eMBErrorCode::MB_ENOERR If no error occurred. In this case a normal Modbus response is sent. - eMBErrorCode::MB_ENOREG if can not map the data of the registers - eMBErrorCode::MB_EILLSTATE if can not procceed with data transfer due to critical error - eMBErrorCode::MB_EINVAL if value data can not be transferred

Examples

References

from examples

eMBMasterRegInputCB() function

Syntax

Arguments

Return value

Examples

References

Call Tree

Data Use

Class Tree

Override Tree

Implementations

Instances

Lifecycle