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11. Connection to other devices
11.4 Modbus TCP
Function Code
1 byte
0x04 ;Read Input Registers
Start address
2 byte
Must always be 1 less than the starting input you
want (zero-based)
Number of input registers
2 byte
1 to 125 (0x7D)
Table 100: Request-PDU
Response to the request being received
1. The starting address is analyzed (distributed among bytes 1 and 2)
b. Byte 1 = Hi; Byte 2 = Lo
2. The number of registers is analyzed (distributed among bytes 3 and 4)
b. Byte 3 = Hi; Byte 4 = Lo
3. The input registers are read from the start of the (starting address) to (starting
a number of input registers)
(An input register corresponds to two bytes)
Function Code
1 byte
0x04 ;Read Input Registers
Bye Count
1 byte
A value of
= 2 * N must always be entered here
Register values
n* 2 byte
value
n= Number of input registers read
Table 101: Response-PDU
Preparation for sending the response
1. The input registers read are mapped to two bytes per input register
2. There are a high byte and a low byte for each input register
a. The first byte = Hi; the second byte = Lo
b. Example:
- Register word Hi0x00
- Register word Lo0x0A
- Content of marker word 0x000A
3. The LSB within the byte is bit 0
Once the response is encoded, it is sent.
11.4.2.5 Write Single Registers 0x06:
This function writes 16 bites to a register ((NET) marker word in the easy)
Function Code
1 byte
0x06 ;Write single Registers
Target address
2 byte
Must always be 1 less than the MW being written
to (if you want MW1 to be written to, there must
be a 0 here)
Register value
2 byte
Value to be written
Table 102: Request-PDU
Response to the request being received
550
easyE4
11/18 MN050009 EN www.eaton.com
Содержание easyE4 series
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Страница 22: ...0 1 About this manual 18 easyE4 11 18 MN050009 EN www eaton com...
Страница 40: ...1 easyE4 control relays description 1 10 Safety regulations 36 easyE4 11 18 MN050009 EN www eaton com...
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Страница 462: ...6 Function blocks 6 4 Timing and counter relay example 458 easyE4 11 18 MN050009 EN www eaton com...
Страница 490: ...7 System settings 7 16 Time and Date setting 486 easyE4 11 18 MN050009 EN www eaton com...
Страница 520: ...9 easyE4 inside 9 7 NET network 516 easyE4 11 18 MN050009 EN www eaton com...
Страница 524: ...10 Diagnostics messages of the operating system 10 2 Diagnostics buffer 520 easyE4 11 18 MN050009 EN www eaton com...
Страница 570: ...11 Connection to other devices 11 6 E mail function 566 easyE4 11 18 MN050009 EN www eaton com...
Страница 578: ...12 Faults 12 4 Functionality of the NET faulty 574 easyE4 11 18 MN050009 EN www eaton com...
Страница 582: ...13 Maintenance 13 3 Storage transport and disposal 578 easyE4 11 18 MN050009 EN www eaton com...
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