# Creating Alarm into the Data Type **URL:** \ **Category:** Ignition\ **Tags:** ignition79\ **Created:** [November 7, 2022, 10:07am UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177 "2022-11-07T10:07:50Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![nejdetciritci](https://avatars.discourse-cdn.com/v4/letter/n/ec9cab/32.png) [@nejdetciritci](https://forum.inductiveautomation.com/u/nejdetciritci)\ **Post date:** [November 7, 2022, 10:07am UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/1 "2022-11-07T10:07:50Z")
Hi everyone, I have a problem with data types and alarms, I created a data type and defined three opc tags, two expression tag for alarms and I generated three alarms at alarms section for defined expression tags. After creating data type, I created a few instance under Tags folder. One of instance uses an alarm in a data type. When I create it I disable the other expression tag and irrelevant opc TAGS. Another instance also uses an alarm. When I create it I disable a irrelevant opc TAG. When it's all over, two instance's alarms tags are showing "Evaluation Error". What is the problem? How can I fix it? Thanks for your help, ---
**Author:** ![tupanaster](https://avatars.discourse-cdn.com/v4/letter/t/5daacb/32.png) [@tupanaster](https://forum.inductiveautomation.com/u/tupanaster)\ **Post date:** [November 7, 2022, 10:12am UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/2 "2022-11-07T10:12:17Z")
A quick guess is that your expression tag is failing to evaluate. Is it a big formula? If you overwrite the instance with just a `true` statement, will the error disappear and trigger the alarm? ---
**Author:** ![nejdetciritci](https://avatars.discourse-cdn.com/v4/letter/n/ec9cab/32.png) [@nejdetciritci](https://forum.inductiveautomation.com/u/nejdetciritci)\ **Post date:** [November 7, 2022, 10:30am UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/3 "2022-11-07T10:30:19Z")
When I overwrite the instance, expression tags value is changing but it doesn't show at the alarm view. I checked expression tag's expression section, everything is written correctly. However it doesn't get fixed until I delete the unused ones. I don't want to delete, I want to disable it but if I don't delete it, it doesn't work as I said. If a tag in the data type are deleted, data type loses its significance . ---
**Author:** ![tupanaster](https://avatars.discourse-cdn.com/v4/letter/t/5daacb/32.png) [@tupanaster](https://forum.inductiveautomation.com/u/tupanaster)\ **Post date:** [November 7, 2022, 11:37am UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/4 "2022-11-07T11:37:54Z")
I'll use some screenshots. ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/1/c12f17d5da87f29930a055d1e007848982c51343.png) ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/9/a9d089b950b6bef94110a2d64be9e73a93dba86a.png) Having checked those fields marked by the arrows, you should see an alarm. I'm not sure if you changed your instance locally to make a test. That green dot shows that it is being modified locally ---
**Author:** ![nejdetciritci](https://avatars.discourse-cdn.com/v4/letter/n/ec9cab/32.png) [@nejdetciritci](https://forum.inductiveautomation.com/u/nejdetciritci)\ **Post date:** [November 7, 2022, 12:22pm UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/5 "2022-11-07T12:22:15Z")
**Thank you for your interest,** I think I can't explain my problem because of that I will write step by step. -START -Create a data type (TestDT) -Create two folder in data type(TestDT) Folder 1 name: Alarms Folder 2 name: OPC Tags -Create two expression tag in Alarms folder Exp. Tag 1 name: Alarms\_Data (short) Exp. Tag 2 name: Alarms\_Connection (short) -Create three OPC tags in OPC Tags folder OPC Tag 1 name: OPC\_Data (short) OPC Tag 2 name: OPC\_Error (short) OPC Tag 3 name: OPC\_Connection (short) -Create 5 alarms in Alarms\_Data (Use Mode Bit State) and write the following in Expression section of Alarms\_Data with binEnc() Alarm1: It will look at bit 0 of OPC\_Data (Data1 overflow error) Alarm2: It will look at bit 1 of OPC\_Data (Data2 overflow error) Alarm3: It will look at bit 2 of OPC\_Data (Data3 overflow error) Alarm4: It will look at bit 3 of OPC\_Data (Data4 overflow error) Alarm5: It will look at bit 4 of OPC\_Data (Data5 overflow error) -Create 2 alarms in Alarms\_Connection (Use Mode Bit State) and write the following in Expression section of Alarms\_Connection with binEnc() Alarm1: It will look at bit 0 of OPC\_Error (Motor error) Alarm2: It will look at bit 1 of OPC\_Error (Lamb error) Alarm3: It will look at bit 2 of OPC\_Error (Low voltage error) Alarm4: It will look at bit 3 of OPC\_Error (High current error) Alarm5: It will look at bit 0 of OPC\_Connection (PLC Conn. lost) Alarm5: It will look at bit 1 of OPC\_Connection (PC Conn. lost) -Create two instances Instance 1 name: PLC1\_100100NC Instance 2 name: PLC1\_100110NC -Disable OPC\_Data tag in the instance of PLC1\_100110NC -Enter instance's OPC Server and Item Path -Watch them -FINISH If you follow this road, you will see an error under the Tag Browser. PLC1\_100110NC will say to you why you create OPC\_Data tag and why don't you use it? Then you must do these if you want to work it. -Go to PLC1\_100110NC instance. -Open Expression section of Alarms\_Data -Delete related things with OPC\_Data -Say OK. Problem was solved. **BUT** I don't want to follow this method. **AND** I wonder that how can I solve it another method? **Thanks,** @Kevin.Herron @paul-griffith @pturmel ---
**Author:** ![tupanaster](https://avatars.discourse-cdn.com/v4/letter/t/5daacb/32.png) [@tupanaster](https://forum.inductiveautomation.com/u/tupanaster)\ **Post date:** [November 7, 2022, 12:55pm UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/6 "2022-11-07T12:55:07Z")
If it's possible, post some screenshots and/or JSON strings for UDTs and tags. ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [November 7, 2022, 1:19pm UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/7 "2022-11-07T13:19:39Z")
If you have expression tags that depend on a disabled tag, I'm not sure what you should expect. Disable those expression tags, too. ---
**Author:** ![nejdetciritci](https://avatars.discourse-cdn.com/v4/letter/n/ec9cab/32.png) [@nejdetciritci](https://forum.inductiveautomation.com/u/nejdetciritci)\ **Post date:** [November 7, 2022, 1:51pm UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/8 "2022-11-07T13:51:27Z")
I am using some alarms in this expression tag so I can't disable this expression tag. @pturmel ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [November 7, 2022, 1:54pm UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/9 "2022-11-07T13:54:41Z")
How can those alarms ever fire if their ultimate source is disabled? It sounds to me like you are trying to push a square peg through a round hole. ---
**Author:** ![nejdetciritci](https://avatars.discourse-cdn.com/v4/letter/n/ec9cab/32.png) [@nejdetciritci](https://forum.inductiveautomation.com/u/nejdetciritci)\ **Post date:** [November 7, 2022, 2:24pm UTC](https://forum.inductiveautomation.com/t/creating-alarm-into-the-data-type/66177/10 "2022-11-07T14:24:31Z")
I just disable the ones I don't want triggered.