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The second part: The address 0x2010-0x2106 has a total of 247 words, which is the "slave
station status indication" area. Reading this area can get the current working status of the
slave station. The data encoding format is shown in "Table 3.3".
Table 3.3 Coding format of slave status indication area
Each Word is divided into high and low bytes. Byte1 is the high byte, indicating the
function code currently executed and mapped to the slave. Byte0 is the low byte, indicating
the error code of the current slave communication. The specific meaning of the slave error
codes is shown in "Table 3.4".
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.
.
Address
0x200F
BIT Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit9 Bit8
Bit
number
x x x x x x x x
BIT Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Bit
number
x 247 246 245 244 243 242 241
Address
0x2010
Slave
station 1
Byte1 Byte0
Function code Error code
Address
0x2011
Slave
station 2
Byte1 Byte0
Function code
Error code
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.
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Address
0x2106
Slave
station
247
Byte1 Byte0
Function code
Error code