YOKOGAWA UT150L, User Manual

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IM 05C01E22-10E
4-7
Chapter 4 MODBUS Communication
06 Writes data into D register.
●
Function
This function code writes data into a specified D register number.
• The maximum number of D registers into which data is written at a time is 1.
• For the format of response in the event of failure, see subsection 4.2.4.
• Lets you specify broadcast (by setting “00” to the address number).
●
Message (for normal operation)
Element
Number of bytes in
RTU mode
Number of bytes in
ASCII mode
1
Write Data
(Upper Digit)
2
Start of
Message
Mark (:)
None
1
Write Data
(Lower Digit)
1
2
Error
Check
2
2
Address
Number
(ADR)
1
2
None
End of Message
Mark
(CR + LF)
2
Function Code
(06)
1
2
D-Register
Number
(Upper Digit)
1
2 2
1
D-Register
Number
(Lower Digit)
Message (continued)
●
Response (for normal operation)
Element
Number of bytes in
RTU mode
Number of bytes in
ASCII mode
1
Write Data
(Upper Digit)
2
Start of
Message
Mark (:)
None
1
Write Data
(Lower Digit)
1
2
Error
Check
2
2
Address
Number
(ADR)
1
2
None
End of Message
Mark
(CR + LF)
2
Function Code
(06)
1
2
D-Register
Number
(Upper Digit)
1
2 2
1
D-Register
Number
(Lower Digit)
Response (continued)
●
Example: Setting 70.0 to the target setpoint of UT150L with address number 01.
The following message writes “700” to the target setpoint (D0120) at address number 01 in the ASCII
mode.
[Message] [ : : ]0106007702BCC4[CR][LF]
Start of message mark
“01”: address number 01, “06”: function code 06, “0077”: D-register address 0120, “02BC”: target
setpoint 70.0, and “C4”: error check
* Numbers in quotation marks are hexadecimal.
The response of the same contents is returned with respect to the above message.
[Response] [ : : ]0106007702BCC4[CR][LF]
Target setpoint: 70.0