initial

snippets/test1.py

@@ -0,0 +1,43 @@
+from pymodbus.client.sync import ModbusTcpClient as ModbusClient
+from pymodbus.exceptions import ModbusIOException
+from time import sleep
+
+
+client = ModbusClient('172.16.2.157')
+
+try:
+    client.connect()
+
+    processImage = client.read_holding_registers(0x1010, 4)
+    if isinstance(processImage, ModbusIOException):
+        raise Exception(processImage)
+
+    if len(processImage.registers) != 4:
+        raise Exception("Unexpected number of registers in process image ({})".format(len(processImage.registers)))
+
+    (analogOutputBits, analogInputBits, digitalOutputBits, digitalInputBits) = processImage.registers
+    print(f"AO: {analogOutputBits}, AI: {analogInputBits}, DO: {digitalOutputBits}, DI: {digitalInputBits}")
+
+    while True:
+        reg = client.read_input_registers(0, analogInputBits // 8)
+        if isinstance(reg, ModbusIOException):
+            raise Exception(reg)
+        print(reg.registers)
+
+        reg = client.read_discrete_inputs(0, digitalInputBits)
+        if isinstance(reg, ModbusIOException):
+            raise Exception(reg)
+        print(reg.bits)
+
+        reg = client.read_coils(0, digitalOutputBits)
+        if isinstance(reg, ModbusIOException):
+            raise Exception(reg)
+        print(reg.bits)
+
+        sleep(0.1)
+
+except Exception as e:
+    print("Exception: {}".format(e))
+finally:
+    client.close()
+