Setting gas as percent with a button or slider

[Dgocof]

I'm using a gas roaster with a modulation gas valve and a Fuji controller. I would like to create a button or slider to set the gas to a certain percent of maximum. So at the beginning of the roast I would like to have the burner on 25% for example. Is this possible? Could I get some advice?

[bigl00z3]

Would the following fit your need?

• Change the Fuji to a fixed value (not controlled by PID algorithm or SV value) . You can most likely do it by switching it to the manual mode. check for the register in the Fuji Modbus manual (eg. for the PXF manual check Here )
• Send the required MV value (25% in your case) using a button with a Modbus command
  (register is 0079 in HEX so 121 in Decimal ) and the value would be value to 25% you probably need to enter 2500 (but double check if there is a multiplication factor)

In this case, the command would probably be write(1,121,2500) (if your slave number for the Fuji is 1, otherwise change accordingly)

• When required reactivate the PID regulation, send a command to switch the Fuji to manual

Note: I am not in front of the roaster to test this, so you may have to test if it works as planned

Nico

[Dgocof]

Thanks Nico for your help. I will try this next week when I return.

[Dgocof]

Hi Nico, This worked great. I had to initiate standby mode first. Then implement the gas percent. Carl Rand Durango Coffee Company Durangocoffee.com 970-385-0276 ext 6

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On Mon, Apr 17, 2023 at 1:28 PM Nico Bigler ***@***.***> wrote: Would the following fit your need? - Change the Fuji to a fixed value (not controlled by PID algorithm or SV value) . You can most likely do it by switching it to the manual mode. check for the register in the Fuji Modbus manual (eg. for the PXF manual check Here <https://felib.fujielectric.co.jp/download/ContentDownload.htm?dataid=16281277&site=global&lang=en> ) - Send the required MV value (25% in your case) using a button with a Modbus command (register is 0079 in HEX so 121 in Decimal <https://www.rapidtables.com/convert/number/hex-to-decimal.html?x=00F0> ) and the value would be value to 25% you probably need to enter 2500 (but double check if there is a multiplication factor) [image: image] <https://user-images.githubusercontent.com/8886922/232585906-91b3d53d-7213-4686-9710-6393199dc7e9.png> In this case, the command would probably be write(1,121,2500) (if your slave number for the Fuji is 1, otherwise change accordingly) - When required reactivate the PID regulation, send a command to switch the Fuji to manual Note: I am not in front of the roaster to test this, so you may have to test if it works as planned Nico — Reply to this email directly, view it on GitHub <#1150 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/A36HWN4MYANJMJ5A4E4W2RLXBWKV5ANCNFSM6AAAAAAXAM23FE> . You are receiving this because you authored the thread.Message ID: <artisan-roaster-scope/artisan/repo-discussions/1150/comments/5641098@ github.com>