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3.1 Modbus Communication
68 Specify monitor
Element
Number of bytes in RTU mode
Number of bytes in ASCII
mode
Element
Number of bytes in RTU mode
Number of bytes in ASCII
mode
69 Monitoring
Element
Number of bytes in RTU mode
Number of bytes in ASCII
mode
Element
Number of bytes in RTU mode
Number of bytes in ASCII
mode
3-18
Function
The register No. specified at random can be specified for monitoring.
•The maximum number of registers that can be specified for monitoring is 100.
• 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.
• When the power supply is turned off, the register specified by "specify monitor" will be
erased. If the power supply is turned off, specify the register by "specify monitor" again.
Message (during normal operation)
Message start
Address No.
mark (:)
(ADR)
None
1
1
2
Continuation of message
Monitor-
specified
• • •
Register No. 1
2
• • •
4
• • •
Response (during normal operation)
Message start
Address No.
mark (:)
(ADR)
None
1
1
2
Note 1: Byte count = 2 x number of specify monitor registers
Function
The content of the register specified for monitoring by function code "68" is read.
• 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)."
Message (during normal operation)
Message start
Address No.
mark (:)
(ADR)
None
1
1
2
Response (during normal operation)
Message start
Address No.
mark (:)
(ADR)
None
1
1
2
Continuation of response
Register
Error check
content
2
2
4
2
Note 1: Byte count = 2 x number of registers of monitoring
Number of
Functioncode
monitor-specified
(0x44)
register
1
2
2
4
Monitor-specified
Error check
Register No. n
2
2
4
2
Function code
Byte count
(0x44)
(Note 1)
1
1
2
2
Function code
Error check
(0x45)
1
2
2
2
Function code
Byte count
(0x45)
(Note 1)
1
1
2
2
Message end
mark (CR+LF)
None
2
Byte
count(Note 1)
1
2
Message
end mark
(CR+LF)
None
2
Message
Error check
end mark
(CR+LF)
2
None
2
2
Message
end mark
(CR+LF)
None
2
Register
• • •
content
2
• • •
4
• • •
IM 05P07A01-01EN
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