Beijer Electronics NA-9379 - Manual (Page 65)

65
MODBUS Programmable I/O NA-9379 FnIO S-Series
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A.3.6. 6 (0x06) Write Single Register
This function code is used to write a single holding register in a remote device. Therefore register numbered 1 is
addressed as 0. The normal response is an echo of the request, returned after the register contents have been
written.
• Request
Field name Example RTU ASCII ASCII (bus line)
Start of Frame - t1-t2-t3 “,” 0x3A
Slave Address 0x07 0x07 “07” 0x30, 0x37
Function Code 0x06 0x06 “06” 0x30, 0x36
Starting Address Hi 0x08 0x08 “08” 0x30, 0x38
Starting Address Lo 0x00 0x00 “00” 0x30, 0x30
Quantity of Outputs Hi 0x11 0x11 “11” 0x31, 0x31
Quantity of Outputs Lo 0x22 0x22 “22” 0x32, 0x32
Error Check (CRC/LRC) - 0x07, 0x85 “B8” 0x42, 0x38
End of Frame - t1-t2-t3 CR, LF 0x0D, 0xA
• Response
Field name Example RTU ASCII ASCII (bus line)
Start of Frame - t1-t2-t3
“,”
0x3A
Slave Address 0x07 0x07
“07”
0x30, 0x37
Function Code 0x06 0x06
“06”
0x30, 0x36
Output Address Hi 0x08 0x08
“08”
0x31, 0x38
Output Address Lo 0x00 0x00
“00”
0x30, 0x30
Output Value Hi 0x11 0x11
“11”
0x31, 0x31
Output Value Lo 0x22 0x22
“22”
0x32, 0x32
Error Check (CRC/LRC) - 0x07, 0x85
“B8”
0x42, 0x38
End of Frame - t1-t2-t3 CR, LF 0x0D, 0xA
- In case of address 0x0800 outputs register value: 0x0000 changes to 0x1122.