#!/usr/bin/env python
# -*- encoding: utf-8 -*-

# modbus exception codes
ILLEGAL_FUNCTION = 1
ILLEGAL_DATA_ADDRESS = 2
ILLEGAL_DATA_VALUE = 3
SLAVE_DEVICE_FAILURE = 4
COMMAND_ACKNOWLEDGE = 5
SLAVE_DEVICE_BUSY = 6
MEMORY_PARITY_ERROR = 8

# supported modbus functions
RAW = 0
READ_COILS = 1
READ_DISCRETE_INPUTS = 2
READ_HOLDING_REGISTERS = 3
READ_INPUT_REGISTERS = 4
WRITE_SINGLE_COIL = 5
WRITE_SINGLE_REGISTER = 6
READ_EXCEPTION_STATUS = 7
DIAGNOSTIC = 8
REPORT_SLAVE_ID = 17
WRITE_MULTIPLE_COILS = 15
WRITE_MULTIPLE_REGISTERS = 16
READ_FILE_RECORD = 20
READ_WRITE_MULTIPLE_REGISTERS = 23
DEVICE_INFO = 43

# supported block types
COILS = 1
DISCRETE_INPUTS = 2
HOLDING_REGISTERS = 3
ANALOG_INPUTS = 4