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Modbus Card For I4 Ups System |
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Protocol Commonly Used On Networks. |
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Communication Using a Master-Slave Technique. |
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Two
Serial Transmission Modes :1) RTU Mode
2)
ASCII Mode |
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Message From Master To Slave : Query |
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Message From Slave To Master : Response |
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Response Can Be Either A Normal Response, Or An
Exception Response. |
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Error
Checking: 1) CRC in RTU Mode
2)
LRC In ASCII Mode |
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Modbus Slave Specification |
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Slave
Address Configuration: |
1
TO 32 |
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Baud Rate : |
9600
BPS |
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Stop Bit : |
1 |
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Physical Link : |
RS-485 |
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Protocol
Mode |
RTU |
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Function Codes |
02H,
Read Input Status |
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06H,
Preset Single Register |
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Exception Codes |
01H,
lllegal Function |
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02H,
Illegal Data Address |
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03H,
llegal Data Value |
