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/*  For GW-7552                         */
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Version 1.9[19/05/2020] by Jimmy
1. Fixed the bug that in Modbus Slave mode, GW-7552 will output DI and AI data in PROFIBUS side.
2. Fixed the safe value displaying error bug.
3. Add new function, the user can choose the modbus function code in write DO 1bit and write AO 1word.
4. Modify GSD file to version v1.50.
5. Add new function, when GW-7552 is connecting utility, the communication format of GW-7552 will change in the following setting:
   Baudrate:115200bps, Parity:None, databit:8bits, stopbit:1bit.
6. Add WatchDog function.
7. Fixed the bug: When the Modbus side is hot swapping quickly, the diagnostic message will display error in Version 1.8.
8. adjust firmware for hardware updating
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Version 1.8[20/05/2015] by Harlem
1. Fixed bug:
   a. Modbus ASCII Receive
   b. Safe Value mode
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Version 1.7[24/01/2014] by Luke
1. Fixed the bug that In the Modbus ASCII mode, it can't read AO/DO
2. Fixed the bug that in "Switch to Safe Value", the safe value won't be set correctly, 
   and it will cause system reset.
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Version 1.6[11/7/2013] by Ryan
1. Extend input area to 132 bytes
2. Modify GSD file to version v1.40
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Version 1.5[30/5/2013] by Elliot
1. System setting is added 4 bytes input.
2. Modify GSD file to version v1.30
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Version 1.4[17/1/2011] by Raiden
1. fixed bug
   a. The data of Modbus function code 15,5 and function code 1 overlap
   b. The data of Modbus function code 16,6 and function code 3 overlap
2. new add auto output function of output module
3. new add change word order function
4. fix communication parameters between GW-7552 and Utility
5. modify GSD file to version v1.20
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Version 1.3[9/7/2009] by Raiden
1. fixed bug: fix ethernet reconnection time error
2. avoid recieve error Modbus message
3. improve Modbus timer accuracy
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Version 1.2[9/4/2009] by Raiden
1. modify modbus exception code to diagnostic message
2. Add Diagnostic function=>lose PROFIBUS output data
3. new add trigger command of single output module
4. set Modbus Memory Size for Modbus Master and Slave mode
5. modify connection command between GW-7552 and Utility
6. fixed bug: EEPROM error for PROFIBUS Command=> New Slave Address
7. modify GSD file to version v1.10
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Version 1.1[11/6/2008] by Raiden
1. modify connection command between GW-7552 and Utility
2. new add "Get firmware version" command for utility
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Version 1.0[22/5/2008] by Raiden