kyle-github
commented
3 months ago It might be duplicate connection IDs. Is every simultaneous connection using a different connection ID? If the generation of connection IDs is not random enough, you can have more than one process generate the same ID.
For reasons unclear to me Rockwell decided that client connection IDs must be unique across all EIP sessions.
Best, Kyle
On Wed, Jul 3, 2024, 6:39 AM Corazon1110 @.***> wrote:
Type of issue
- [ X] Bug
Description of issue
_ Hi. I got trouble like this: I use 1 device to connect to PLC Rockwell. PLC model
1769-L33ER/A LOGIX5333ER
So far, the connection with the PLC has been successful. However, recently, I've been using three distinct scripts on the same devices to simultaneously connect with the same PLC. While it's still able to establish a connection with the PLC and retrieve the PLC model, it's unable to fetch the PLC tags.
class RockwellPLC(PLC): def init(self): super().init() self.plc = PLC() PATH = os.path.join(Path(os.path.dirname(file)).parent, 'core')
Define the path to the JSON file
json_file_path = os.path.join(PATH, "plc_config.json") with open(json_file_path, 'r') as json_file: config_data = json.load(json_file) plc_parameters = config_data.get("plc_parameters", {}) self.IPAddress = plc_parameters.get("PLC_IP") self.ProcessorSlot = int(plc_parameters.get("PLC_SLOT")) def read_signal_station(self, station): self.Enable_array = [self.Read(f'PpST{station}.PpPrequisiteEnable[{i}]').Value for i in range(15, 20)] self.Complete_array = [self.Read(f'PpST{station}.PpPrequisite[{i}]').Value for i in range(15, 20)]Expected behavior
2 array of Enable and Complete Signal
[False, False, False, False, False] [False, False, False, False, False]
Actual behavior
sometimes it cannot connect to PLC and return:
[None, None, None, None, None] [None, None, None, None, None]
issue type: forward open failed Code
class PlcRockwell: def init(self): self.Station_Complete = None print('Initial PLC') self.ModelNumber = None self.Complete_array = list() self.Enable_array = list() self.plc = None self.VIN = None self.StationArray = None self._connect_plc()
self.append_object_list()
def init_cam_string(self): self._NullInspString = "NULL|NULL|NULL|0" self._Current_Cam_1_Insp = self._NullInspString self._Current_Cam_2_Insp = self._NullInspString self._Current_Cam_3_Insp = self._NullInspString self._Current_Cam_4_Insp = self._NullInspString self._init_cam_file() self._Cam_1_list = list() self._Cam_2_list = list() self._Cam_3_list = list() self._Cam_4_list = list() def _connect_plc(self): PATH = os.path.dirname(__file__) # Define the path to the JSON file json_file_path = os.path.join(PATH, "param.json") try: # Load JSON content from the file with open(json_file_path, 'r') as json_file: config_data = json.load(json_file) # PLC Parameters plc_parameters = config_data.get("plc_parameters", {}) self.PLC_IP, self.PLC_RACK, self.PLC_SLOT = ( plc_parameters.get(key) for key in ["PLC_IP", "PLC_RACK", "PLC_SLOT"] ) self.StationArray = plc_parameters.get("STATION") print(self.PLC_IP) try: ipaddress.IPv4Address(self.PLC_IP) except Exception as e: exit(f"Invalid PLC ID address format {e}") except Exception as e: exit(f'local_orch/_connect_plc: {e}') def get_data(self) -> None: """ Retrieves data from the PLC. Reads VIN, ModelNumber, PP_Enable, and Insp_Compete from the PLC. """ try: with PLC() as comm: comm.IPAddress = self.PLC_IP comm.ProcessorSlot = self.PLC_SLOT self.VIN = comm.Read(f'PpST{str(self.StationArray)}.FrPpModelSerial').Value self.ModelNumber = comm.Read(f'PpST{str(self.StationArray)}.FrPpModelNumber').Value self.Complete_array.clear() self.Enable_array.clear() self.Station_Complete = comm.Read(f'PpST{str(self.StationArray)}.PpStationComplete').Value for i in range(15, 20): self.Enable_array.append(comm.Read(f'PpST{str(self.StationArray)}.PpPrequisiteEnable[{i}]').Value) self.Complete_array.append(comm.Read(f'PpST{str(self.StationArray)}.PpPrequisite[{i}]').Value) if self.VIN == "": self.VIN = "NULL" self.ModelNumber = "NULL" except Exception as e: # Handle exceptions as needed print(f"Error: {e}")Please provide a minimal, reproducible example.
https://stackoverflow.com/help/minimal-reproducible-example Screenshots Stacktrace Versions
Version 1.0.1 Include versions to
- pylogix: 1.0.1
- plc model: 1769-L33ER/A LOGIX5333ER
- python: 3.8,10
- OS: Linux
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Corazon1110
TheFern
TheFern2
dmroeder
Type of issue
Description of issue
_ Hi. I got trouble like this: I use 1 device to connect to PLC Rockwell. PLC model
So far, the connection with the PLC has been successful. However, recently, I've been using three distinct scripts on the same devices to simultaneously connect with the same PLC. While it's still able to establish a connection with the PLC and retrieve the PLC model, it's unable to fetch the PLC tags.
Expected behavior
2 array of Enable and Complete Signal
Actual behavior
sometimes it cannot connect to PLC and return:
issue type: forward open failed
Code
Please provide a minimal, reproducible example.
https://stackoverflow.com/help/minimal-reproducible-example
Screenshots
Stacktrace
Versions
Version 1.0.1Include versions to