# Help on message construction in a TRIGGER node
**URL:** https://discourse.nodered.org/t/help-on-message-construction-in-a-trigger-node/23381
**Category:** General
**Created:** [20 March 2020 23:24 UTC](https://discourse.nodered.org/t/help-on-message-construction-in-a-trigger-node/23381 "2020-03-20T23:24:30Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [20 March 2020 23:24 UTC](https://discourse.nodered.org/t/help-on-message-construction-in-a-trigger-node/23381/1 "2020-03-20T23:24:30Z")
This is a broken down flow of my _problem_.
Putting aside the `change` node at the top:
Press the `inject` node and get a message saying 192.168.0.254 is online.
The `trigger` node waits 10 seconds and if nothing is received I want it to send the same message but replace online with offline.
Alas this isn't happening.
--
Now the top part:
This sets the flow variable `SCAN_FREQUENCY` to 20000. (20 seconds)
I want the _delay_ on the `trigger` node to be twice that value.
It is shown like this because there is no direct connection from how the _SCAN\_FREQUENCY_ is set and the `trigger` node.
The code:
```auto
[{"id":"7b035fc4.696038","type":"inject","z":"a941e919.4a7d88","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":100,"y":2270,"wires":[["d263b33b.c60ba8"]]},{"id":"d263b33b.c60ba8","type":"change","z":"a941e919.4a7d88","name":"","rules":[{"t":"set","p":"SCAN_TIME","pt":"flow","to":"20000","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":290,"y":2270,"wires":[[]]},{"id":"ae0a9ed3.61274","type":"function","z":"a941e919.4a7d88","name":"","func":"msg = {\"topic\":\"192.168.0.254\",\n \"host\":\"192.168.0.254\",\n \"_topic\":\"Gateway\",\n \"payload\":\"192.168.0.254 On-line\",\n };\n\nreturn msg;","outputs":1,"noerr":0,"x":250,"y":2380,"wires":[["45d4648.bca2c9c","f302ebc0.037eb8"]]},{"id":"834f8cd5.72dd28","type":"inject","z":"a941e919.4a7d88","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":100,"y":2380,"wires":[["ae0a9ed3.61274"]]},{"id":"45d4648.bca2c9c","type":"debug","z":"a941e919.4a7d88","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":420,"y":2340,"wires":[]},{"id":"f302ebc0.037eb8","type":"trigger","z":"a941e919.4a7d88","op1":"","op2":"{\"topic\":\"192.168.0.254\",\"host\":\"192.168.0.254\",\"_topic\":\"Gateway\",\"payload\":\"192.168.0.254 Off-line\",\"_msgid\":\"f742073e.b764d8\"}","op1type":"pay","op2type":"json","duration":"10","extend":true,"units":"s","reset":"","bytopic":"all","name":"","x":440,"y":2380,"wires":[["598f8ae4.df6c7c"]]},{"id":"598f8ae4.df6c7c","type":"debug","z":"a941e919.4a7d88","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":610,"y":2340,"wires":[]}]
```
---
### Author:  [@zenofmud](https://discourse.nodered.org/u/zenofmud)
#### Post date: [20 March 2020 23:59 UTC](https://discourse.nodered.org/t/help-on-message-construction-in-a-trigger-node/23381/2 "2020-03-20T23:59:40Z")
Your bottom flow is sending the 'offline' msg, but you have stuck it inside an object inside msg.payload.
Change the 'Then Send' option to
and your debug will look like:
I don't believe that you can dynamically set the delay time
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [19 May 2020 23:59 UTC](https://discourse.nodered.org/t/help-on-message-construction-in-a-trigger-node/23381/3 "2020-05-19T23:59:50Z")
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