YOKOGAWA UTAdvanced Series, User Manual

Page: 48 / 866

3-17
IM 05P07A01-01EN
Description of RS-485 Communication (for UT
Advanced with RS-485 Communication)
3

67 Random writing

Function
Data is written to the register Nos. specified at random.
• Register Nos. can be specified from all register areas.
• The maximum number of registers that can be written to at a time is 50.
• For details on the response format at an error, see “● Response in an error state” in
“3.1.3 Configuration of Responses (response from UTAdvanced).”
• Broadcasting can be specified. No response is returned when broadcasting is
specified.

Message (during normal operation)
Element
Message start
mark (:)
Address No.
(ADR)
Function code
(0x43)
Number of
specified
registers
Byte count
(Note 1)
Specified
register No.1
Number of bytes in RTU mode None 1 1 2 2 2
Number of bytes in ASCII
mode
1 2 2 4 4 4
Continuation of message
Write data 1 • • •
Specified
Register No.n
Write data n Error check
Message
end mark
(CR+LF)
2 • • • 2 2 2 None
4 • • • 4 4 2 2
Note 1: Byte count = 4 x number of write registers

Response (during normal operation)
Element
Message start
mark (:)
Address No.
(ADR)
Function code
(0x43)
Number of
specified
registers
Error check
Message
end mark
(CR+LF)
Number of bytes in RTU mode None 1 1 2 2 None
Number of bytes in ASCII
mode
1 2 2 4 2 2
3.1 Modbus Communication