2023-06-25 17:44:56 +00:00
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# pyhoff
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2025-02-16 22:49:16 +00:00
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The pyhoff package allows to read and write the most common
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Beckhoff and WAGO bus terminals ("Busklemmen") using the bus
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coupler ("Busskoppler") BK9000, BK9050, BK9100 or WAGO 750_352
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over Ethernet TCP/IP based on ModBus TCP.
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2023-06-25 17:44:56 +00:00
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It depends on the package pyModbusTCP. This can be installed with:
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pip install pyModbusTCP
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It is easy to use as the following example code shows:
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```python
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from pyhoff import *
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#connect to the BK9050 by tcp/ip on default port 502
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bus_coupler = ModBusBK9050("172.16.17.1")
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#list of all bus terminals connected to the bus coupler
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#in the order of the physical arrangement
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terminal_list = [KL2404, KL2424, KL9100, KL1104, KL3202,
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KL4002, KL9188, KL3054, KL3214, KL4004,
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KL9010]
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terminals = bus_coupler.add_bus_terminals(terminal_list)
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#Set 1. output of the first bus terminal (KL2404) to hi
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terminals[0].write_coil(0, True)
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#read the temperature from the 2. channel of the 5. bus
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#terminal (KL3202)
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t = terminals[4].read_temperature(1)
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print(f"t = {t:.1f} °C")
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#Set 1. output of the 6. bus terminal (KL4002) to 4.2 V
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terminals[5].set_voltage(0, 4.2)
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```
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The following terminals are implemented:
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- KL1104: 4x digital input 24 V
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- KL2404: 4x digital output with 500 mA
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- KL2424: 4x digital output with 2000 mA
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- KL3054: 4x analog input 4...20 mA 12 Bit single-ended
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- KL3202: 2x analog input PT100 16 Bit 3-wire
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- KL3214: 4x analog input PT100 16 Bit 3-wire
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- KL4002: 2x analog output 0...10 V 12 Bit differentiell
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- KL4004: 4x analog output 0...10 V 12 Bit differentiell
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- Dummy terminals without io functionality: KL9100, KL9183, KL9188
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Other analog and digital io-terminals are easy to complement. Pull requests are welcome.
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