The MQTT Injectors have a Push Trigger configuration parameter that determines when to push data in combination with the Tag Pacing Period
It has three settings:
Let's see how each of these settings affect what data will be pushed using this example:
Timestamp (in seconds) | Tag Path | Value |
---|---|---|
0.5 | T1 | 1 |
0.75 | T2 | 1 |
1.5 | T3 | 1 |
2.5 | T1 | 2 |
4.5 | T1 | 3 |
4.75 | T1 | 4 |
Messages will be pushed on the 'tag pacing period', in this case every second, and the message will contain changing tags only:
At Time 0 - BIRTH - Includes:
T1 with a value of 0 and timestamp of 0
T2 with a value of 0 and timestamp of 0
T3 with a value of 0 and timestamp of 0
At Time +1 - DATA - Includes:
T1 with a value of 1 and timestamp of 0.5
T2 with a value of 1 and timestamp of 0.75
At Time +2 - DATA - Includes:
T3 with a value of 1 and timestamp of 1.5
At Time +3 - DATA - Includes:
T1 with a value of 2 and timestamp of 2.5
At Time +4 - DATA - Includes:
T1 with a value of 3 and timestamp of 4.5
T1 with a value of 4 and timestamp of 4.75
Messages will be pushed on the 'tag pacing period', in this case every second, and the message will contain all current values:
At Time 0 - BIRTH - Includes:
T1 with a value of 0 and timestamp of 0
T2 with a value of 0 and timestamp of 0
T3 with a value of 0 and timestamp of 0
At Time +1 - DATA - Includes:
T1 with a value of 1 and timestamp of 0.5
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 0 and timestamp of 0
At Time +2 - DATA - Includes:
T1 with a value of 1 and timestamp of 0.5
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 1 and timestamp of 1.5
At Time +3 - DATA - Includes:
T1 with a value of 2 and timestamp of 2.5
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 1 and timestamp of 1.5
At Time +4 - DATA - Includes:
T1 with a value of 2 and timestamp of 2.5
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 1 and timestamp of 1.5
At Time +5 - DATA - Includes:
T1 with a value of 4 and timestamp of 4.75
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 1 and timestamp of 1.5
Note the missed event for T1 with value 3 at timestamp 4.5 |
Tow messages will be pushed on the 'tag pacing period', in this case every second, with one message containing tag change events and one containing the non-changed tag data:
At Time 0 - BIRTH - Includes:
T1 with a value of 0 and timestamp of 0
T2 with a value of 0 and timestamp of 0
T3 with a value of 0 and timestamp of 0
At Time 1.0 - DATA - Includes:
T1 with a value of 1 and timestamp of 0.5
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 0 and timestamp of 0
At Time 2.0 - DATA - Includes:
T1 with a value of 1 and timestamp of 0.5
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 1 and timestamp of 1.5
At Time 3.0 - DATA - Includes:
T1 with a value of 2 and timestamp of 2.5
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 1 and timestamp of 1.5
At Time 4.0 - DATA - Includes:
T1 with a value of 2 and timestamp of 2.5
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 1 and timestamp of 1.5
At Time 5.0 - DATA - Includes (Note both events for T1 are now present):
T1 with a value of 3 and timestamp of 4.5
T1 with a value of 4 and timestamp of 4.75
T2 with a value of 1 and timestamp of 0.75
T3 with a value of 1 and timestamp of 1.5