T850_TO_T870 and T870_TO_T850 Elementary Functions for the BMENOP0300

Introduction

The BMENOP0300 module is a device that sends and receives data timestamped according to the IEC 61850 protocol. Some Mx80 ERT devices send and receive data timestamped according to the IEC60870 protocol.

To enable data transfer between devices that support different timestamp structures, you can use the following elementary functions in your program logic:

T850_TO_T870: This EF takes IEC60870 timestamped data (for example, data generated by the BMXNOR0200 module) and converts it to the more easily readable IEC 61850 format.
T870_TO_T850: This EF takes IEC 61850 timestamped data generated by the BMENOP0300 module and converts it to the IEC60870 format where it can be used by other Mx80 ERT devices.

T850_TO_T870 Representation in FBD

The following graphic depicts the T850_TO_870 function:

T850_TO_T870 Parameters

Parameter	Type	Description
Input parameters:
IN	TIME_850_FORMAT	the IEC 61850 timestamp format
Output parameters:
OUT	TIME_870_FORMAT	the IEC 60870 timestamp format

T870_TO_T850 Representation in FBD

The following graphic depicts the T870_TO_T850 function:

T870_TO_T850 Parameters

Parameter	Type	Description
Input parameters:
IN	TIME_870_FORMAT	the IEC 60870 timestamp format
Output parameters:
OUT	TIME_850_FORMAT	the IEC 61850 timestamp format

Data Type Structure: TIME_850_FORMAT

Element	Type	Description
Seconds	DWORD	seconds since 01-01-1970 NOTE: Only dates after January 01, 2000 are valid.
Ms_Quality	DWORD	milliseconds in IEC 61850 format in low three bytes (Highest byte manages quality.)

Data Type Structure: TIME_870_FORMAT

Element	Type	Description
ms	WORD	from 0...59999 ms
min	BYTE	Numerical minute reference: 0...59. The highest bit indicates time validity: 0 = valid time 1 = invalid time
hour	BYTE	numerical hour reference: 0...23 NOTE: SU (summertime) is not supported.
day	BYTE	numerical day reference: 1...31. NOTE: Day of week is not supported.
mon	BYTE	numerical month reference: 1...12
year	BYTE	numerical year reference: 0...99
reserved	BYTE	<reserved>