Delta EtherCAT User Manual

Operating MRAM on PAC EtherCAT Programming Guide
30-2 March, 2017
30
API list of MRAM in PAC
API Description
_ECAT_Master_MRAM_Write_Word_Data
Write the U16 data (Word) to the specified address of
MRAM in PAC.
_ECAT_Master_MRAM_Read_Word_Data
Read the U16 data (Word) from the specified address
of MRAM in PAC.
_ECAT_Master_MRAM_Write_DWord_Data
Write the U32 data (DWord) into the specified address
of MRAM in PAC.
_ECAT_Master_MRAM_Read_DWord_Data
Read the U32 data (DWord) from the specified address
of MRAM in PAC.
30.1 _ECAT_Master_MRAM_Write_Word_Data
 Syntax
U16 PASCAL _ECAT_Master_MRAM_Write_Word_Data(U16 CardNo, U32 Index, U32
DataNum, U16 *Data)
 Purpose
Write the U16 data (Word) to the specified address of MRAM in PAC.
Note: Delta MH1 and MP1 series PAC provide 128K byte retentive memory space. API allows Word type
data to access the retentive memory. Index 0 will occupy byte 0 and byte 1, index 1 occupies byte 2 and
byte 3 and so on. The index range is between 0 and 65535.
 Parameter
Name Data type Property Description
CardNo U16 Number Card number
Index U32 Value Range: 0 ~ 65535
DataNum U32
Quantity
Data number to be written into the memory
Data U16*
Data array
Data array to be written into the memory

Example
U16 Status = 0;
U16 CardNo = 16;
U16 data [3] = { 1, 2, 3};
// Write data to the last three data space of retentive memory.
U32 Index=65533, DataNum=3;
Status= _ECAT_Master_MRAM_Write_Word_Data(CardNo, Index, DataNum, &data);

Delta EtherCAT Specifications

General

Brand	Delta
Model	EtherCAT
Category	Control Systems
Language	English