NOTICE DATE: September 21, 2015

NOTICE TYPE: W-A092115-01 Operations

SHORT DESCRIPTION: ERCOT MOTE will be open for DST testing

INTENDED AUDIENCE: QSE operations personnel

DAY AFFECTED: October 5 through October 09, 2015 and October 19 through October 23, 2015

LONG DESCRIPTION: The ERCOT Market Operations Test Environment (MOTE) will be available for Market Participant Daylight Saving Time (DST) testing as listed in the tables below. Note that there are two periods for testing this year. The testing periods will be from Monday through Friday and will follow the simulated times shown in the table.

Iteration 1

Real-time	Simulated time	MOTE system DST Testing
10/05/2015 10:00 am	10/29/2015 10:00 pm	MOTE Servers Normal Time change to DST Time
10/05/2015 01:00 pm	10/30/2015 01:00 am	Start testing QSE submissions for next 7 days including 10/31/2015, Long Day 11/01/2015 Operating Days
10/05/2015 10:00 pm	10/30/2015 10:00 am	DAM close for Operating Day 10/31/2015
10/06/2015 10:00 pm	10/31/2015 10:00 am	DAM close for Operating Day 11/01/2015 (Long DST Day )
10/07/2015 02:00 pm	11/01/2015 02:00 am	DST Transition Time
10/07/2015 03:00 pm	11/01/2015 02:00* am	DST Repeated Hour
10/07/2015 11:00 pm	11/01/2015 10:00 am	DAM close for Operating Day 11/02/2015
10/08/2015 11:00 pm	11/02/2015 10:00 am	DAM close for Operating Day 11/03/2015
10/09/2015 10:00 am	11/02/2015 09:00 pm	Close of Test and MOTE Servers DST Time Change to Normal Time

Iteration 2

Real-time	Simulated time	MOTE system DST Testing
10/19/2015 10:00 am	10/29/2015 10:00 pm	MOTE Servers Normal Time change to DST Time
10/19/2015 01:00 pm	10/30/2015 01:00 am	Start testing QSE submissions for next 7 days including 10/31/2015, Long Day 11/01/2015 Operating Days
10/19/2015 10:00 pm	10/30/2015 10:00 am	DAM close for Operating Day 10/31/2015
10/20/2015 10:00 pm	10/31/2015 10:00 am	DAM close for Operating Day 11/01/2015 (Long DST Day )
10/21/2015 02:00 pm	11/01/2015 02:00 am	DST Transition Time
10/21/2015 03:00 pm	11/01/2015 02:00* am	DST Repeated Hour
10/21/2015 11:00 pm	11/01/2015 10:00 am	DAM close for Operating Day 11/02/2015
10/22/2015 11:00 pm	11/02/2015 10:00 am	DAM close for Operating Day 11/03/2015
10/23/2015 10:00 am	11/02/2015 09:00 pm	Close of Test and MOTE Servers DST Time Change to Normal Time

ADDITIONAL INFORMATION: For information regarding submissions, including Daylight Saving Time requirements, please refer to the latest version of the EIP External Interface Specifications document for use of the External Web Services (EWS) found in the Wholesale section of the http://www.ercot.com/services/mdt/xsds/ webpage. The most recent External Web Services XSD may also be found in the same location.

During testing, the URL for XML submissions will be: https://testingapi.ercot.com/2007-08/Nodal/eEDS/EWS/.

The URL for UI submissions will be: https://testing.ercot.com/mmsui/mmsui/displayTradesLanding.action.

The following are examples of how the Long DST Day November 1, 2014 are labeled:

0100

0200 (Normal Hour)

0200* (Repeated Hour)

0300

0400

0500

The MOTE MPIM application will be unavailable for the duration of the DST testing.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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