Motor Start Logs

Description

The LTMT main unit records 250 current values measured during the last motor start.

One log can be saved to serve as motor start reference log.

The last motor start log can be saved as reference log by using:

The TeSys Tera DTM.
A command from a PLC or DCS via the communication network.

The last motor start log and the reference log:

Can be displayed with the TeSys Tera DTM.
Are available for PLC or DCS via the communication network.

Two read requests of 256 bytes are necessary to read the last motor start log, and two read requests of 256 bytes are necessary to read the reference log.

Sampling Interval

The sampling interval is based on the trip class selected in the thermal overload settings.

Trip class	Sampling interval
5	20 ms
10	40 ms
15	60 ms
20	80 ms
25	100 ms
30	120 ms
35	140 ms
40	160 ms

Motor Start Log 1

Slot	Index	Byte offset	Size (in bytes)	X	Unit	Type	Svd	Parameter name
1	30	0	8	1	–	UINT16	Y	Date and Time
1	30	8	2	1	ms	UINT16	Y	Sampling interval
1	30	10	2	0.1	A	UINT16	Y	IFLC
1	30	12	2	0.1	%IFLC	UINT16	Y	Sample 1
1	30	14	2	0.1	%IFLC	UINT16	Y	Sample 2
1	30	16	2	0.1	%IFLC	UINT16	Y	Sample 3
…	…	…	…	…	…	…	…	…
1	30	238	2	0.1	%IFLC	UINT16	Y	Sample 114

Motor Start Log 2

Slot	Index	Byte offset	Size (in bytes)	X	Unit	Type	Svd	Parameter name
1	31	0	2	0.1	%IFLC	UINT16	Y	Sample 115
1	31	2	2	0.1	%IFLC	UINT16	Y	Sample 116
1	31	4	2	0.1	%IFLC	UINT16	Y	Sample 117
1	31	6	2	0.1	%IFLC	UINT16	Y	Sample 118
…	…	…	…	…	…	…	…	…
1	31	238	2	0.1	%IFLC	UINT16	Y	Sample 234

Motor Start Log 3

Slot	Index	Byte offset	Size (in bytes)	X	Unit	Type	Svd	Parameter name
1	32	0	8	0.1	%IFLC	UINT16	Y	Sample 235
1	32	2	2	0.1	%IFLC	UINT16	Y	Sample 236
…	…	…	…	…	…	…	…	…
1	32	30	2	0.1	%IFLC	UINT16	Y	Sample 250