# Cannot read/write a plc5 float

**URL:** <https://forum.inductiveautomation.com/t/cannot-read-write-a-plc5-float/8829>\
**Category:** Ignition\
**Created:** [July 31, 2014, 11:15am UTC](https://forum.inductiveautomation.com/t/cannot-read-write-a-plc5-float/8829 "2014-07-31T11:15:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![giles](https://avatars.discourse-cdn.com/v4/letter/g/c68b51/32.png) [@giles](https://forum.inductiveautomation.com/u/giles)\
**Post date:** [July 31, 2014, 11:15am UTC](https://forum.inductiveautomation.com/t/cannot-read-write-a-plc5-float/8829/1 "2014-07-31T11:15:37Z")

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Hi I am using the allen bradley ethernet driver with a PLC5 - but it will not read/write a float eg F15:0

any ideas anybody?

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [July 31, 2014, 12:53pm UTC](https://forum.inductiveautomation.com/t/cannot-read-write-a-plc5-float/8829/2 "2014-07-31T12:53:29Z")

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Are there any errors in the console on the gateway when you attempt to read or write? The tag does show up in the browse though?

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**Author:** ![giles](https://avatars.discourse-cdn.com/v4/letter/g/c68b51/32.png) [@giles](https://forum.inductiveautomation.com/u/giles)\
**Post date:** [July 31, 2014, 2:18pm UTC](https://forum.inductiveautomation.com/t/cannot-read-write-a-plc5-float/8829/3 "2014-07-31T14:18:47Z")

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Hi

By which I assume you mean.

System

Status  
Licensing  
Backup/Restore  
-\>Console  
User Manual

If so there are two like this:

15:14:00 DefaultExceptionMapper Connection lost, give up responding.

org.apache.wicket.protocol.http.servlet.ResponseIOException: org.eclipse.jetty.io.EofException  
at org.apache.wicket.protocol.http.servlet.ServletWebResponse.flush(ServletWebResponse.java:268)  
at org.apache.wicket.protocol.http.HeaderBufferingWebResponse.flush(HeaderBufferingWebResponse.java:92)  
at org.apache.wicket.request.resource.AbstractResource.flushResponseAfterHeaders(AbstractResource.java:633)  
at org.apache.wicket.request.resource.AbstractResource.setResponseHeaders(AbstractResource.java:619)  
at org.apache.wicket.request.resource.AbstractResource.respond(AbstractResource.java:493)  
at org.apache.wicket.request.handler.resource.ResourceRequestHandler.respond(ResourceRequestHandler.java:75)  
at org.apache.wicket.request.handler.resource.ResourceReferenceRequestHandler.respond(ResourceReferenceRequestHandler.java:108)

but I don’t think they are related.

I can’t browse any data in the plc - not sure I am meant to be able to with a plc5? However it works for integers just not floats

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<div class="post-metadata">

**Author:** ![giles](https://avatars.discourse-cdn.com/v4/letter/g/c68b51/32.png) [@giles](https://forum.inductiveautomation.com/u/giles)\
**Post date:** [July 31, 2014, 2:59pm UTC](https://forum.inductiveautomation.com/t/cannot-read-write-a-plc5-float/8829/4 "2014-07-31T14:59:00Z")

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Ah ignore this I seem to have tags in my database whi8ch don;t actually exist in the plc Thanks for your help