Python connector for low-level Mitsubishi MELSEC FX series (FX-232AW) serial protocol.
Protocol specification - Link
Note it is not the same as Non-Protocol Communication (or D8120) as described in FX Series Programmable Controllers manuals.
Python library and CLI utility allow to read and write PLC registers like X0, Y0, S0, T0, M0 and D0.
import asyncio
from contextlib import closing
from fxplc.client.FXPLCClient import FXPLCClient
from fxplc.transports.TransportSerial import TransportSerial
from fxplc.transports.TransportTCP import TransportTCP
async def main():
transport = TransportSerial("/dev/ttyUSB0")
# or, for TCP transport
# transport = TransportTCP("192.168.1.100", 8888)
# await transport.connect()
with closing(FXPLCClient(transport)) as fx:
s0_state = await fx.read_bit("S0")
t0_state = await fx.read_bit("T0")
t0_value = await fx.read_int("T0")
await fx.write_bit("S1", True)
asyncio.run(main())fxplc -p /dev/ttyUSB0 read_bit S0
fxplc -p /dev/ttyUSB0 read_bit T0
fxplc -p /dev/ttyUSB0 read_int T0
fxplc -p tcp:192.168.1.100:8888 read_int T0
fxplc -p /dev/ttyUSB0 write_bit S1 on
fxplc -p /dev/ttyUSB0 read S0 T0
# S0 = off
# T0 = on, counter: 30The project also includes HTTP webserver subproject which exposes REST API for external clients. It also serves a simple UI that allows variables viewing and modifying.
python --variables vars.yaml --path /dev/ttyUSB0
python --variables vars.yaml --path tcp:10.5.12.10:8887vars.yaml
variables:
- name: PUMP
register: M10
- name: MIXER_OPEN
register: D0
- name: MIXER_CLOSE
register: D1
- name: OUT_PUMP
register: Y000
- name: OUT_MIXER_OPEN
register: Y000
- name: OUT_MIXER_CLOSE
register: Y001
- name: FLOW_COUNTER_1
register: D50
Tested on:
- FX1N-06MR (chinese clone)
- FX1N-20MR (chinese clone)
- FX3U-24MR (chinese clone)
- FX3U-48MR (chinese clone)
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