# openHistorian **URL:** http://discussions.gridprotectionalliance.org/c/gpa-products/openhistorian/10.md?page=4 [Latest](http://discussions.gridprotectionalliance.org/latest.md) · [Categories](http://discussions.gridprotectionalliance.org/categories.md) **Page:** 5 --- ## [Export monthly data from openHistorian with one day frequency](http://discussions.gridprotectionalliance.org/t/export-monthly-data-from-openhistorian-with-one-day-frequency/905)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 2\ **Last updated:** [June 4, 2021, 7:10am UTC](http://discussions.gridprotectionalliance.org/t/export-monthly-data-from-openhistorian-with-one-day-frequency/905 "2021-06-04T07:10:12Z")
Hi Ritchie, Is it possible to download monthly data for a measurement with samples of 1 day? Thanks, Datta --- ## [Prevent or stop credential cache in openHistorian 2.6.x](http://discussions.gridprotectionalliance.org/t/prevent-or-stop-credential-cache-in-openhistorian-2-6-x/893)
**Author:** [@logesaustralia](http://discussions.gridprotectionalliance.org/u/logesaustralia)\ **Replies:** 7\ **Last updated:** [May 30, 2021, 1:54pm UTC](http://discussions.gridprotectionalliance.org/t/prevent-or-stop-credential-cache-in-openhistorian-2-6-x/893 "2021-05-30T13:54:23Z")
Hi Ritchie, Currently, I’m using openHistorian 2.6.30.x. Is there any option to stop or prevent credential cache? Thanks & Regards Logu --- ## [Reading archive data from another openHistorian instance](http://discussions.gridprotectionalliance.org/t/reading-archive-data-from-another-openhistorian-instance/898)
**Author:** [@logesaustralia](http://discussions.gridprotectionalliance.org/u/logesaustralia)\ **Replies:** 1\ **Last updated:** [May 25, 2021, 1:09pm UTC](http://discussions.gridprotectionalliance.org/t/reading-archive-data-from-another-openhistorian-instance/898 "2021-05-25T13:09:02Z")
We need to use one openHistorian instance archive data to another openHistorian instance. E.g. OpenHistorian instance A running and collecting data for 5 days OpenHistorian instance B is not running and when needed, w… --- ## [Unable to extract CALC signals using openHistorian API](http://discussions.gridprotectionalliance.org/t/unable-to-extract-calc-signals-using-openhistorian-api/892)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 9\ **Last updated:** [May 21, 2021, 5:12am UTC](http://discussions.gridprotectionalliance.org/t/unable-to-extract-calc-signals-using-openhistorian-api/892 "2021-05-21T05:12:31Z")
Hi Ricthie, I am not being able to extract the measurements of Signal Type CALC using python openHistorian API although I am able to extract measurements of all other signal types. Kindly help in this regard. Thanks an… --- ## [PMU connection Tester receives junk chars from PMU](http://discussions.gridprotectionalliance.org/t/pmu-connection-tester-receives-junk-chars-from-pmu/889)
**Author:** [@logesaustralia](http://discussions.gridprotectionalliance.org/u/logesaustralia)\ **Replies:** 8\ **Last updated:** [May 19, 2021, 2:21am UTC](http://discussions.gridprotectionalliance.org/t/pmu-connection-tester-receives-junk-chars-from-pmu/889 "2021-05-19T02:21:34Z")
Hi Ritchie, I have connected a PMU from one laptop (running Windows 10 - English), please see the output. PMU connection Tester was successfully connected with PMU. Received initial configuration frame. But, Data fra… --- ## [Exporting data pertaining STAT historian instance](http://discussions.gridprotectionalliance.org/t/exporting-data-pertaining-stat-historian-instance/888)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 4\ **Last updated:** [May 17, 2021, 1:00am UTC](http://discussions.gridprotectionalliance.org/t/exporting-data-pertaining-stat-historian-instance/888 "2021-05-17T01:00:41Z")
Hi Ritchie, Is there any way to download the data pertaining to the STAT historian instance without disabling PPA? Thanks, Dattatreya --- ## [Modifying Text in UI of openHistorian localhost for customer demo](http://discussions.gridprotectionalliance.org/t/modifying-text-in-ui-of-openhistorian-localhost-for-customer-demo/887)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 3\ **Last updated:** [May 14, 2021, 12:32am UTC](http://discussions.gridprotectionalliance.org/t/modifying-text-in-ui-of-openhistorian-localhost-for-customer-demo/887 "2021-05-14T00:32:30Z")
Hi Ritchie, As a part of our customer demo we are planning to abstract all instances of “openHistorian” with Analytics. Is there an easy way to implement that in our end? To illustrate please find the screenshot below w… --- ## [Measurement List for each device in openHistorian](http://discussions.gridprotectionalliance.org/t/measurement-list-for-each-device-in-openhistorian/886)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 12\ **Last updated:** [May 12, 2021, 4:42am UTC](http://discussions.gridprotectionalliance.org/t/measurement-list-for-each-device-in-openhistorian/886 "2021-05-12T04:42:31Z")
Hi, Is there a query by which we can get the list of measurements for each of the devices in openHistorian? Thanks and regards, Dattatreya --- ## [Replacing openHistorian with brand name in localhost URL](http://discussions.gridprotectionalliance.org/t/replacing-openhistorian-with-brand-name-in-localhost-url/885)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 1\ **Last updated:** [May 10, 2021, 1:04pm UTC](http://discussions.gridprotectionalliance.org/t/replacing-openhistorian-with-brand-name-in-localhost-url/885 "2021-05-10T13:04:28Z")
Hi, Is there a way to replace all openHistorian instances with organisation name in the localhost URL? Thanks and regards, Dattatreya --- ## [Sequence Component Calculation Abruptly Stopped](http://discussions.gridprotectionalliance.org/t/sequence-component-calculation-abruptly-stopped/884)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 6\ **Last updated:** [April 30, 2021, 5:14am UTC](http://discussions.gridprotectionalliance.org/t/sequence-component-calculation-abruptly-stopped/884 "2021-04-30T05:14:08Z")
Hi Ritchie, Not sure what might be the reason, the sequence component calculations suddenly stopped working from today. They were working fine till yesterday. I had refreshed the Archive folder for openHistorian. After … --- ## [Meta-data refresh is failed with error Failed to synchronize meta-data to local cache: constraint failed UNIQUE constraint failed: Device.NodeID, Device.Acronym](http://discussions.gridprotectionalliance.org/t/meta-data-refresh-is-failed-with-error-failed-to-synchronize-meta-data-to-local-cache-constraint-failed-unique-constraint-failed-device-nodeid-device-acronym/879)
**Author:** [@logesaustralia](http://discussions.gridprotectionalliance.org/u/logesaustralia)\ **Replies:** 12\ **Last updated:** [April 30, 2021, 2:11am UTC](http://discussions.gridprotectionalliance.org/t/meta-data-refresh-is-failed-with-error-failed-to-synchronize-meta-data-to-local-cache-constraint-failed-unique-constraint-failed-device-nodeid-device-acronym/879 "2021-04-30T02:11:04Z")
Hi, When updating meta-data from publisher, failed with below error message, so we are not able to see all devices. Exception Type: System.InvalidOperationException Exception Message: Failed to synchronize … --- ## [Creating custom measurements in OpenHistorian](http://discussions.gridprotectionalliance.org/t/creating-custom-measurements-in-openhistorian/883)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 1\ **Last updated:** [April 29, 2021, 3:08pm UTC](http://discussions.gridprotectionalliance.org/t/creating-custom-measurements-in-openhistorian/883 "2021-04-29T15:08:54Z")
Hi, Is there any option to create a custom measurement in openHistorian such as a new voltage measurement which differs by a constant with respect to another existing voltage measurement? Thanks, Dattatreya --- ## [Manage Power Calculation : bug when adding a line that creates the second page](http://discussions.gridprotectionalliance.org/t/manage-power-calculation-bug-when-adding-a-line-that-creates-the-second-page/882)
**Author:** [@Korunekosama](http://discussions.gridprotectionalliance.org/u/Korunekosama)\ **Replies:** 1\ **Last updated:** [April 27, 2021, 5:56pm UTC](http://discussions.gridprotectionalliance.org/t/manage-power-calculation-bug-when-adding-a-line-that-creates-the-second-page/882 "2021-04-27T17:56:03Z")
Hello ! I encountered a bug when creating the Power Calc measurements in the Action \> Manage Power Calculations panel in OpenHistorian Manager 2.8 RC2. Everything works fine till there’s only one page listing the measu… --- ## [Sequence Components not generated for all device](http://discussions.gridprotectionalliance.org/t/sequence-components-not-generated-for-all-device/877)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 17\ **Last updated:** [April 21, 2021, 3:36am UTC](http://discussions.gridprotectionalliance.org/t/sequence-components-not-generated-for-all-device/877 "2021-04-21T03:36:49Z")
Hi, After installing the latest release of open Historian, I activated the Bulk Sequence Calculator. However I am getting the sequence components for only one device, and for the other devices only SNR is being generate… --- ## [OpenHistorian for Dummies?](http://discussions.gridprotectionalliance.org/t/openhistorian-for-dummies/285)
**Author:** [@brad](http://discussions.gridprotectionalliance.org/u/brad)\ **Replies:** 7\ **Last updated:** [April 21, 2021, 3:26am UTC](http://discussions.gridprotectionalliance.org/t/openhistorian-for-dummies/285 "2021-04-21T03:26:59Z")
Is there like a crash course documentation for OpenHistorian2? Maybe something along the lines of… “I’ve installed it, now what?”. This is coming from an Electrical Engineer trying to things working. I’ve got experience … --- ## [openHistorian Web application basic authentication not working in https (secure mode)](http://discussions.gridprotectionalliance.org/t/openhistorian-web-application-basic-authentication-not-working-in-https-secure-mode/875)
**Author:** [@logesaustralia](http://discussions.gridprotectionalliance.org/u/logesaustralia)\ **Replies:** 12\ **Last updated:** [April 20, 2021, 3:28am UTC](http://discussions.gridprotectionalliance.org/t/openhistorian-web-application-basic-authentication-not-working-in-https-secure-mode/875 "2021-04-20T03:28:03Z")
Hi, We have configured openHistorian web application in https mode (using self-signed certificate). I have created user “A” – database user not an AD user. Login process is not working for “user A” and keep holding st… --- ## [Tons of the same exception. What should I do next?](http://discussions.gridprotectionalliance.org/t/tons-of-the-same-exception-what-should-i-do-next/874)
**Author:** [@Haibo\_Mao](http://discussions.gridprotectionalliance.org/u/Haibo_Mao)\ **Replies:** 6\ **Last updated:** [April 20, 2021, 3:17am UTC](http://discussions.gridprotectionalliance.org/t/tons-of-the-same-exception-what-should-i-do-next/874 "2021-04-20T03:17:34Z")
I got tons of the same exception in the log. Please help. Time: 4/14/2021 12:08:47 AM - Component - NA - SystemHealth - None Event Name: First Chance App Domain Exception Exception: System.UnauthorizedAccessException… --- ## [Bulk sequence Calculator adapter do not start automatically](http://discussions.gridprotectionalliance.org/t/bulk-sequence-calculator-adapter-do-not-start-automatically/868)
**Author:** [@Korunekosama](http://discussions.gridprotectionalliance.org/u/Korunekosama)\ **Replies:** 9\ **Last updated:** [April 19, 2021, 12:30pm UTC](http://discussions.gridprotectionalliance.org/t/bulk-sequence-calculator-adapter-do-not-start-automatically/868 "2021-04-19T12:30:28Z")
Hello, I’m using the Bulk Sequence Calculator in OpenHistorian 2.8.16.0 to provide V & I 0/+/- values ; then showing them in Grafana. Everything works fine but when the OpenHistorian service restart, the adapter do not… --- ## [AlarmPanelState plugin in Grafana seems not to work](http://discussions.gridprotectionalliance.org/t/alarmpanelstate-plugin-in-grafana-seems-not-to-work/869)
**Author:** [@Korunekosama](http://discussions.gridprotectionalliance.org/u/Korunekosama)\ **Replies:** 2\ **Last updated:** [April 15, 2021, 10:22am UTC](http://discussions.gridprotectionalliance.org/t/alarmpanelstate-plugin-in-grafana-seems-not-to-work/869 "2021-04-15T10:22:56Z")
Hello, I’m trying to make a dashboard in Grafana (v. 7.5.0) to monitor my PMUs alarms state ; and want to use the ‘OpenHistorian AlarmPanelState’ without success for the moment. I have add the ALARMPANELSTATE adapter i… --- ## [How to enable https connection for openHistorian web Manager](http://discussions.gridprotectionalliance.org/t/how-to-enable-https-connection-for-openhistorian-web-manager/867)
**Author:** [@logesaustralia](http://discussions.gridprotectionalliance.org/u/logesaustralia)\ **Replies:** 5\ **Last updated:** [April 9, 2021, 3:32am UTC](http://discussions.gridprotectionalliance.org/t/how-to-enable-https-connection-for-openhistorian-web-manager/867 "2021-04-09T03:32:10Z")
Hi, We need to configure openHistorian web manager using SSL mode (certificate). Please provide the detailed steps for below How to configure the certificate for openHistorian Web Manager to perform https? How to use… --- ## [OSI PI input adapter is missing](http://discussions.gridprotectionalliance.org/t/osi-pi-input-adapter-is-missing/830)
**Author:** [@David\_G\_Hidalgo](http://discussions.gridprotectionalliance.org/u/David_G_Hidalgo)\ **Replies:** 8\ **Last updated:** [April 6, 2021, 4:28pm UTC](http://discussions.gridprotectionalliance.org/t/osi-pi-input-adapter-is-missing/830 "2021-04-06T16:28:12Z")
Hello I’ve dowloaded openHistorian V 2.7 Installs, made a regular installation on windows using SQLite database (with Sample data script). But, OSIsoft PI input adapters are not available on the input adapters menu. Ho… --- ## [OpenHistorian - OPC UA input](http://discussions.gridprotectionalliance.org/t/openhistorian-opc-ua-input/676)
**Author:** [@KBonnot](http://discussions.gridprotectionalliance.org/u/KBonnot)\ **Replies:** 9\ **Last updated:** [April 6, 2021, 5:45am UTC](http://discussions.gridprotectionalliance.org/t/openhistorian-opc-ua-input/676 "2021-04-06T05:45:28Z")
Hello there, Brand new here from a ‘grid user’ side of things : I work in the renewable field and I’m looking to using OpenHistorian in our existing architecture. The Modbus input configuration works well (I’m still in … --- ## [Writing key values continuously in openHistorian using Python openhistorian api](http://discussions.gridprotectionalliance.org/t/writing-key-values-continuously-in-openhistorian-using-python-openhistorian-api/857)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 16\ **Last updated:** [April 6, 2021, 1:41am UTC](http://discussions.gridprotectionalliance.org/t/writing-key-values-continuously-in-openhistorian-using-python-openhistorian-api/857 "2021-04-06T01:41:30Z")
I am using the Python openhistorian api to write values into certain tags continuously in real time on the basis of their key PointID. However I found that it is editing that tag only once and on further execution the va… --- ## [Howto compile OpenHistorian-OPC-UA-Adapter](http://discussions.gridprotectionalliance.org/t/howto-compile-openhistorian-opc-ua-adapter/864)
**Author:** [@NewUser](http://discussions.gridprotectionalliance.org/u/NewUser)\ **Replies:** 1\ **Last updated:** [April 2, 2021, 1:20pm UTC](http://discussions.gridprotectionalliance.org/t/howto-compile-openhistorian-opc-ua-adapter/864 "2021-04-02T13:20:25Z")
Hello, I installed openHistorian and it is running fine. To get data from my OPC devices i found that i need the following link : Iám running this test on Windows server2019 standard I downloaded the complete zip fi… --- ## [Reading CALC signals using openHistorian Python API](http://discussions.gridprotectionalliance.org/t/reading-calc-signals-using-openhistorian-python-api/858)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 3\ **Last updated:** [March 26, 2021, 6:40am UTC](http://discussions.gridprotectionalliance.org/t/reading-calc-signals-using-openhistorian-python-api/858 "2021-03-26T06:40:41Z")
The openhistorian python API is unable to read CALC signals although it is reading all other signal types. Is there any fix for this? Also is there a way to get the source code for the Power Calculations and how the corr… --- ## [Bulk Sequence Calculator in openHistorian v2.8.7](http://discussions.gridprotectionalliance.org/t/bulk-sequence-calculator-in-openhistorian-v2-8-7/855)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 1\ **Last updated:** [March 17, 2021, 2:50am UTC](http://discussions.gridprotectionalliance.org/t/bulk-sequence-calculator-in-openhistorian-v2-8-7/855 "2021-03-17T02:50:14Z")
I have enabled the Bulk Sequence Calculator dll. But unlike Manage Power Calculations where we can evaluate the active, reactive and apparent power calculations, I am not sure where can I evaluate the sequence components… --- ## [openHistorianv2.8.7 localhost issues](http://discussions.gridprotectionalliance.org/t/openhistorianv2-8-7-localhost-issues/852)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 2\ **Last updated:** [March 16, 2021, 1:12am UTC](http://discussions.gridprotectionalliance.org/t/openhistorianv2-8-7-localhost-issues/852 "2021-03-16T01:12:12Z")
I installed openHistorian v2.8.7. I am not being able to see my device signals on grafana in the port where openHistorian has been hosted although all my devices are visible on openHistorian Manager and even I can trend … --- ## [How to use Sequence Calculator in openHistorian](http://discussions.gridprotectionalliance.org/t/how-to-use-sequence-calculator-in-openhistorian/849)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 1\ **Last updated:** [March 10, 2021, 4:38am UTC](http://discussions.gridprotectionalliance.org/t/how-to-use-sequence-calculator-in-openhistorian/849 "2021-03-10T04:38:42Z")
I have added PowerCalculations.SequenceCalculator in openHistorian Manager. But I am unable to figure out how to use this feature. When I am selecting Manage Power Calculations I do not find an option for SequenceCalcula… --- ## [Installing multiple instances of openHistorian in separate drives](http://discussions.gridprotectionalliance.org/t/installing-multiple-instances-of-openhistorian-in-separate-drives/843)
**Author:** [@Datta](http://discussions.gridprotectionalliance.org/u/Datta)\ **Replies:** 11\ **Last updated:** [March 5, 2021, 12:31am UTC](http://discussions.gridprotectionalliance.org/t/installing-multiple-instances-of-openhistorian-in-separate-drives/843 "2021-03-05T00:31:39Z")
Is it possible to install multiple instances of openHistorian in separate drives of the same system? --- ## [OpenHistorian alerts and Grafana -Two different alerts on the same Signal = issue](http://discussions.gridprotectionalliance.org/t/openhistorian-alerts-and-grafana-two-different-alerts-on-the-same-signal-issue/844)
**Author:** [@Korunekosama](http://discussions.gridprotectionalliance.org/u/Korunekosama)\ **Replies:** 6\ **Last updated:** [March 4, 2021, 4:42pm UTC](http://discussions.gridprotectionalliance.org/t/openhistorian-alerts-and-grafana-two-different-alerts-on-the-same-signal-issue/844 "2021-03-04T16:42:13Z")
Hello, I’m trying to visualize some alerts configured in OpenHistorian on Grafan panels. For each PMU I have two alerts related to the Frequency : high frequency : Signal PMU\_Frequency greater than 50.2 Hz during more… [Previous page](http://discussions.gridprotectionalliance.org/c/gpa-products/openhistorian/10.md?page=3) [Next page](http://discussions.gridprotectionalliance.org/c/gpa-products/openhistorian/10.md?page=5)