S7 1214 & Redlion - Register value on start up not being seen

[UKAi]

Hello
I have a siemens 1500 connected to a redlion DA30

I use the redlion to write an operator entered number (retained) to a register in the PLC

operator entry

tag

when I start the machine up the redlion has a value, but the PLC does not .. any ideas

redlion on start up

plc on start up

After a start up, IF I enter a new value in the redlion, the PLC updates and shows the value.

my first thought is on start up of the redlion to (+1) to the register wait for a few seconds and then (-1) from it,

Has this happened to anyone else?

Thanks

 

[JesperMP]

What data type is a red-lion LONG exactly ?
A 'Long' is usually a 64-bit data type in many programming languages.
edit: In Java, a long is a 64-bit data type, in C it is a 32-bit data type.
edit edit: And in S7-1500 an LINT is a 64-bit data type, i.e. a "long integer".

DB7.DBD38 in the S7-1200 is 32-bit double-integer.

edit edit edit: Not sure if S7-1200 supports Long data types. S7-1500 does.
My guess is that you have to change the data type in the red lion software to a double integer.

 

[L D[AR2P#0.0]]

Is DB7 set to optimised or non-optimised.
Has the plc PUT/GET been enabled.

 

[UKAi]

thanks Jesper will have a look at the data type - I am in fact using a 1500 series on this job
LD - the block is not optimised, PUT/GET is enabled

- the values display correctly in the PLC once the red lion value is changed following start up - its more like the PLC cant read the redlions retained value, until it is changed

 

[JesperMP]

The S7-1500 is not reading from the red-lion.
The red lion is sending values from the to the S7-1500 upon data entry on the screen.
That is what you are seeing.
If you need data to be retentive, they should be in the PLC.

Apart from recipes, I have never heard of retentive data residing in an HMI.

 

[UKAi]

Thanks for clearing that up,
Is there a way I can make the redlion send it's retained value on start up? Or at least without having to change it?

 

[Rob...]

How is the tag set up to read from the PLC?

Cyclic continuous
Cyclic in operation
On demand

 

[UKAi]

Where do you set that? I can't see it in the tag browser anywhere?

 

[UKAi]

Okay guys my bad.
I had the tag set with security access. Doh.
Removed this and now the retained value in the HMI is written to the plc on start.
Doh.
Thanks for the quick replies

 

[Rob...]

Storage property is where you should look.

 

[UKAi]

Hi Rob,

yea, that option for me is greyed out as the tags are not defined as an array,
(see my first post 2nd image)

 

[UKAi]

Okay guys my bad.
I had the tag set with security access. Doh.
Removed this and now the retained value in the HMI is written to the plc on start.
Doh.
Thanks for the quick replies