T850_TO_T870 and T870_TO_T850 Elementary Functions for the 140 NOP 850 00

Introduction

The 140 NOP 850 00 module is a device that sends and receives data timestamped according to the IEC60870 protocol. Some Quantum ERT devices send and receive data timestamped according to the IEC 61870 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 IEC61850 timestamped data (for example, data generated by the 140 NOP 850 00 module) and converts it to the more easily readable IEC 60870 format.
T870_TO_T850: This EF takes IEC 60870 timestamped data generated by a Quantum ERT device and converts it to the IEC61850 format where it can be used by the 140 NOP 850 00 module.

T850_TO_T870 Representation in FBD

The following graphic depicts the T850_TO_T870 function:

T850_TO_T870 Parameters:

Parameter	Type	Description
Input parameters:
IN	TIME_850_FORMAT	The IEC61850 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 IEC61850 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 IEC61850 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>