<aside> 💡 For the activity you need a variable from the machine (or from a sensor) that is

a) always available

b) changes when the activity changes

</aside>

<aside> 💡 Examples for Activity

Activity example 1.json

Activity example 2.json

</aside>

1. Decide on what raw-data the activity shall be logically dependent. This data shall come from an MQTT-IN node! (not directly from S7, etc.)

   Machine Property	Hint on activity
   has rotating cylinders	when cylinders are rotating, the machine is active (activity = 1) (when all cylinder are rotating?)
   the machine has an engine	when the engine is turned on/reaches a minimal power, the machine is activated.
   the machine measures the feeding rate	A feeding rate over 0 implies the machines activity
   some kind of glider/rider movement is measured by a sensor	If the distance between sensor and glider/rider changes over a specific threshold, the machine is active.
   Mean Output over timeinterval x	If machines produces a /count at least every x Seconds (x seconds = cycle time) than the machine can be interpreted as active

   <aside> 💡 Feel free to add other logics you used in practice!

   </aside>

   There are several other options, as each machine is a bit different and gives individual information through sensors, S7 or WAGO, etc.

2. From the value you have chosen, you need to map this value on 1 and 0 (for the activity) using a function. Also boolean values have to be mapped!

   

   //from a boolean value as input
   msg.payload = msg.payload.LA_T_START ? 1 : 0;
   return msg;
   
   //or 
   
   //when the pace is 0, the activity shall be 0 as well. 
   //else activity shall be 1
   var acti; 
   
   if (msg.payload.Geschw_mm_sec == 0) {
       acti = msg.payload.Geschw_mm_sec; 
   }
   else{
       acti = 1;
   }
   
   msg.payload = {
   
   "timestamp_ms": Date.now(),
   "activity": acti,
   
   };
   
   return msg;
   

3. After this calculation you just need to give the message the “activity”-topic and send it out via MQTT