modbus_wrapper

wrapper for pyModbusTCP accepting all Modbus numbers with Fatek support

read

List of different Modbus types can be provided in the input:

Reading Coils, Holding registers and Discrete input:

>> client = ModbusClient("10.0.57.30")
>> modbus_object_list = [20,20,30,31,32,33,33, 400800, 400801, 100300]
>> client read(modbus_list)
{'20': 'False', '30': 'False', '31': 'True', '32': 'True', '33': 'False', '400800': '0', '400801': '0', '100300': 'None'}

For above example only 3 modbus function calls will be executed:

read_coils(19, 14)
read_holding_registers(799, 2)
read_discrete_inputs(299, 1)

• All coils are read in one function call thanks to MaxReadSize and ReadMask parameters which can be configured in modbus object config file

client.read(modbus_list, max_read_size=1)

For above example, 8 modbus functions will be executed:

read_coils(19, 1)
read_coils(29, 1)
read_coils(30, 1)
read_coils(31, 1)
read_coils(32, 1)
read_holding_registers(799, 1)
read_holding_registers(800, 1)
read_discrete_inputs(299, 1)

read with range

read_modbus_objects

write

write_modbus_objects

Fatek Support

Fatek table

Modbus	FATEK	Description
000001～000256	Y0～Y255	Discrete Output
001001～001256	X0～X255	Discrete Input
002001～004002	M0～M2001	Discrete M Relay
006001～007000	S0～S999	Discrete S Relay
009001～009256	T0～T255	Status of T0～T255
009501～009756	C0～C255	Status of C0～C255
400001～404168	R0～R4167	Holding Register
405001～405999	R5000～R5998	Holding Register or ROR
406001～408999	D0～D2998 Data	Register
409001～409256	T0～T255	Current Value of T0～T255
409501～409700	C0～C199	Current Value of C0～C199( 16-bit)
409701～409812	C200～C255	Current Value of C200～C255( 32-bit)