IOLM_SMI_SHeader Struct Reference

#include <IOLM_SMI_Types.h>

Data Fields
INT8U	u8Service
	IOLM_SMI_EServiceID.
INT8U	u8Reserved
	Reserved.
INT16U	u16ExpRefArgBlockId
	Expected response or referenced ArgBlock Id in BigEndian.
INT8U	u8Instance
	Addressed instance (port, track, etc.).
INT8U	u8ClientId
	Client id. IOLM_SMI_CLIENTID_INTERN and IOLM_SMI_CLIENTID_BROADCAST are reserved.
INT16U	u16ArgBlockLength
	Little endian.

Detailed Description

This structure is used for the SMI_Header.

The SMI_Header is sent before every data exchange to prepare the recipient for the following data. On serial transmission after the Header follows an ArgBlock with u16ArgBlockLength number of bytes.