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- #!/usr/bin/env python
- # -*- coding: utf-8 -*-
- """
- Modbus TestKit: Implementation of Modbus protocol in python
- (C)2009 - Luc Jean - luc.jean@gmail.com
- (C)2009 - Apidev - http://www.apidev.fr
- This is distributed under GNU LGPL license, see license.txt
- """
- #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
- 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_WRITE_MULTIPLE_REGISTERS = 23
- DEVICE_INFO = 43
- #supported block types
- COILS = 1
- DISCRETE_INPUTS = 2
- HOLDING_REGISTERS = 3
- ANALOG_INPUTS = 4
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