Add python installation script, openrc run script and CIP400 emulation script
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# cip400
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Modbus server (slave) that emulates CIP400 controlles
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Modbus server (slave) that emulates CIP400 controlles
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Meant to be run on Alpine linux
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#!/sbin/openrc-run
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name="cip400"
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command="/media/floppy/${name}/run"
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command_background="yes"
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pidfile="/run/cip400.pid"
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#!/usr/bin/env python3
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import sys
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import traceback
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import argparse
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from pyModbusTCP.server import ModbusServer, DataBank, DataHandler
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from time import sleep, time
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FORCED_OFF = 20210
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RESET = 20001
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FULL_STATUS = 19000
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SELF_STATUS = 19005
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TIME_OF_DAY = 20200
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PHOTOCELL = 20202
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DIMMING = 20203
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class MaHandler(DataHandler):
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def __init__(self, data_bank):
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super().__init__(data_bank=data_bank)
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data_bank.last_forcedoff_write = 0
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def read_coils(self, address, count, srv_info):
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ret = super().read_coils(address, count, srv_info)
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return ret
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def read_d_inputs(self, address, count, srv_info):
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ret = super().read_d_inputs(address, count, srv_info)
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return ret
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def read_h_regs(self, address, count, srv_info):
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ret = super().read_h_regs(address, count, srv_info)
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return ret
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def read_i_regs(self, address, count, srv_info):
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ret = super().read_i_regs(address, count, srv_info)
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return ret
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def write_coils(self, address, bits_l, srv_info):
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ret = super().write_coils(address, bits_l, srv_info)
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if address == RESET and bits_l[0]:
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instance.data_bank.set_holding_registers(FORCED_OFF, [0])
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instance.data_bank.set_input_registers(FULL_STATUS, [4])
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instance.data_bank.set_input_registers(SELF_STATUS, [4])
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instance.data_bank.set_input_registers(TIME_OF_DAY, [255])
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instance.data_bank.set_input_registers(PHOTOCELL, [255])
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instance.data_bank.set_holding_registers(DIMMING, [0])
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instance.data_bank.set_coils(RESET, [False])
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else:
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pass
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return ret
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def write_h_regs(self, address, words_l, srv_info):
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ret = super().write_h_regs(address, words_l, srv_info)
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if address == DIMMING:
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print(f"write Dimming {address=} -> {words_l[0]}")
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if words_l[0] in (0, 128):
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self.data_bank.set_input_registers(DIMMING, [0])
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elif words_l[0] == 129:
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self.data_bank.set_input_registers(DIMMING, [1])
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elif words_l[0] == 130:
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self.data_bank.set_input_registers(DIMMING, [2])
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else:
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pass
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elif address == TIME_OF_DAY:
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print(f"write ToD {address=} -> {words_l[0]}")
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if words_l[0] in (0, 128):
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self.data_bank.set_input_registers(TIME_OF_DAY, [0])
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elif words_l[0] == 129:
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self.data_bank.set_input_registers(TIME_OF_DAY, [1])
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elif words_l[0] == 130:
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self.data_bank.set_input_registers(TIME_OF_DAY, [2])
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elif words_l[0] == 131:
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self.data_bank.set_input_registers(TIME_OF_DAY, [3])
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elif words_l[0] == 132:
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self.data_bank.set_input_registers(TIME_OF_DAY, [4])
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else:
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pass
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elif address == FORCED_OFF:
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print(f"write Forced off {address=} -> {words_l[0]}")
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self.data_bank.last_forcedoff_write = time()
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else:
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pass
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return ret
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if __name__ == "__main__":
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start_time = time()
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"-H", "--host", type=str, default="localhost", help="Host (default: localhost)"
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)
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parser.add_argument(
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"-p", "--port", type=int, default=11800, help="TCP port (default: 11800)"
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)
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parser.add_argument(
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"-d",
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"--daemon",
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action="store_true",
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help="Run as daemon with no 15 min timeout",
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)
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args = parser.parse_args()
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try:
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instance = ModbusServer(
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host=args.host,
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port=args.port,
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no_block=True,
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data_hdl=MaHandler(data_bank=DataBank()),
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)
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instance.start()
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while True:
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if (
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not args.daemon
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and time() - start_time > 60 * 15
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and time() - instance.data_bank.last_forcedoff_write > 60 * 2
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):
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print("input timeout. stopping device")
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break
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if time() - instance.data_bank.last_forcedoff_write > 1:
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instance.data_bank.set_holding_registers(FORCED_OFF, [0])
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instance.data_bank.set_input_registers(FULL_STATUS, [1])
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instance.data_bank.set_input_registers(SELF_STATUS, [1])
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instance.data_bank.set_input_registers(TIME_OF_DAY, [3])
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instance.data_bank.set_input_registers(PHOTOCELL, [3])
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instance.data_bank.set_holding_registers(DIMMING, [0])
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sleep(1)
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except Exception as ex:
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instance.stop()
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exc = sys.exception()
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traceback.print_tb(exc.__traceback__, limit=3, file=sys.stdout)
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print(f"An epic failure just has happened! ({ex})")
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else:
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instance.stop()
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print("bye")
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@ -0,0 +1,45 @@
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#!/usr/bin/env sh
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cd /media/floppy/cip400/
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log_file="/var/log/cip400.txt"
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process_ids=""
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trap 'terminate' INT TERM
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venv=".venv"
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if [ ! -d "$venv" ]; then
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echo "No venv dir. Creating it now..."
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python3 -m venv .venv
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source .venv/bin/activate
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pip install pyModbusTCP
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deactivate
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fi
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source .venv/bin/activate
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terminate() {
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for pid in $process_ids; do
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echo "terminating process $pid" >> $log_file
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kill $pid
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done
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exit 1
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}
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for i in $(seq 11800 11829); do
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echo "starting CIP400 at port $i" >> $log_file
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python3 cip400.py --host '0.0.0.0' --port $i --daemon &
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process_ids="$process_ids $!"
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done
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echo $process_ids >> $log_file
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wait
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echo 'that is it' >> $log_file
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exit 0
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# cp /media/floppy/cip400/cip400 /etc/init.d/
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# chmod 744 /etc/init.d/cip400
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# rc-update add cip400 default
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# service cip400 status
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