memory based data monitor

Will create a timer to cyclicaly check a global memory data stoared in node-red , until the data changed into a planned data

change and reset memory data

Will change a global memory data , then reset it (2 seconds). the global data is normaly connected with a device's modbus or s7 or opcua BUS.

used for process operation

the global memory data is connected with device's data, send the request operation to device , then waiting the response from the device.