1.0.10 • Published 3 years ago
node-red-contrib-redplc-unipi11 v1.0.10
node-red-contrib-redplc-unipi11
Node-Red node for Unipi 1.1
Node Features
- 12 x 5-24V Digital Inputs
- 8 x Relays
- 2 x Analog Inputs (0..10V)
- Each analog input can be selected 12bit-18bit or Disabled
- 12bit conversion time 5ms/channel
- 14bit conversion time 25ms/channel
- 16bit conversion time 100ms/channel
- 18bit conversion time 300ms/channel
- Analog input value in mV
- Scaling with factor and offset
Install
For using with Ladder-Logic install redPlc nodes
For using with other nodes, install module nodes
Install with Node-Red Palette Manager or npm command:
cd ~/.node-red
npm install node-red-contrib-redplc-unipi11
Usage
Update is triggered by redPlc cpu node or module-update node This node reads/writes from/to Node-Red global variables This node works only on Raspberry Pi with Raspberry Pi OS. Enable I2C with raspi-config.
I/O Mapping
Digital Input (Variable I):
Bit | Function |
---|---|
0 | I01 |
1 | I02 |
2 | I03 |
3 | I04 |
4 | I05 |
5 | I06 |
6 | I07 |
7 | I08 |
8 | I09 |
9 | I10 |
10 | I11 |
11 | I12 |
Digital Output (Variable Q):
Bit | Function |
---|---|
0 | Relay 1 |
1 | Relay 2 |
2 | Relay 3 |
3 | Relay 4 |
4 | Relay 5 |
5 | Relay 6 |
6 | Relay 7 |
7 | Relay 8 |
Analog Input (Variable IA):
Array-Index | Input |
---|---|
0 | AI1 |
1 | AI2 |
Scaling with Factor and Offset:
Formula:
Factor = (OH - OL) / (IH - IL)
Offset = OL - (IL * Factor)
Output = Input * Factor + Offset
Where:
IL = Input Low (mV), IH = Input High (mV)
OL = Output Low, OH = Output High
Example:
Input: 0mV .. 10000mV, IL = 0, IH = 10000 Output: -20°C .. 60°C, OL = -20, OH = 60 Factor = (60 - (-20)) / (10000 - 0) = 0.008 Offset = (-20) - (0 * 0.008) = -20
Input = 4000mV Output = 4000 * 0.008 + (-20) = 12°C
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