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/*  For GW-7553                         */
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Version 3.8[19/05/2020] by Jimmy and Harlem
1. Support Modbus slave ID: 0~255
2. fix bug: DI and AI in PROFIBUS part (When GW-7553 is Modbus Slave)
3. add:Modbus commands(write multiple or write single) can be chosen in write DO 1bit or write AO 1word 
4. GSD update to version 2.14
5. add:System setting module input area can show the last two part IP address of the fault Modbus device.
6. add:GW-7553 web config item, Normal/Setting DIP Switch status
7. adjust firmware for hardware updating
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Version 3.7[15/09/2015] by Harlem
1. fix bug:main.html
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Version 3.6[20/05/2015] by Harlem
1. fix bug:Modbus ASCII Receive
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Version 3.5[24/01/2014] by Ryan
1. fix bug:Modbus ASCII communication error
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Version 3.4[27/05/2013] by Ryan
1. Input data area of System Setting Module added 6 bytes for Diagnostic messages.
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Version 3.3[14/09/2012] by Ryan
1. Accept Modbus broadcast ID's frame in Modbus ASCII/RTU/TCP
2. Accept Modbus device ID(255)'s frame in Modbus TCP
3. Add an error message(Modbus Device ID error) to communication log
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Version 3.2[28/08/2012] by Ryan
1. fix bug: can't log in the web with default password
2. fix bug: Modbus TCP communication error
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Version 3.1[22/06/2012] by Ryan
1. fix bug: Modbus communication error
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Version 3.0[10/05/2012] by Ryan
1. new add: device search function
2. new add: Web-based administration
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Version 2.1[26/03/2012] by Ryan
1. fix bug: Diagnostic message can't show the description in SIMATIC PLC
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Version 2.0[14/04/2011] by Ryan
1. increase PROFIBUS DPV1 read/write/Datatransport services
2. fix bug: max input data length -> 240 Bytes
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Version 1.3[26/11/2009] by Raiden
1. increase Modbus DO, DI, AO, AI Array size
2. increase safe value size and EEPROM address
3. fix communication parameters between GW-7553 and Utility
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Version 1.2[23/7/2009] by Raiden
1. new add auto output function for output module
2. new add change word order function
3. increase IO Data size (output size: 131=>240, input size: 128=>244)
4. improve Modbus timer accuracy 
5. fix communication parameters between GW-7553 and Utility
6. modify GSD file to version v1.10
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Version 1.1[8/5/2009] by Raiden
1. fixed bug: fix ethernet reconnection time error
2. avoid recieve error Modbus message
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Version 1.0[9/2/2009] by Raiden