YOKOGAWA UTAdvanced Series, User Manual

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4-5
IM 05P07A01-01EN
Description of Ethernet Communication (Modbus/TCP) (for UT
Advanced with Ethernet Communication)
4
4.4 Communication with Host Computer
4.4.1 List of Function Codes
These instruction words are used so that the host computer obtains the D register and I
relay information of the UT75A/UT55A/UT35A/UP55A/UP35A.
List of Function Codes
Code No. Function Description
01 Reading of multiple I relays Up to 256 registers can be read continuously (I4001 to I7072).
03 Reading of multiple D registers Up to 100 registers can be read continuously (D0001 to D7600) *.
05 Writing of I relays Only one register can be written (I4001 to I7072).
06 Writing of D registers Only one register can be written (D0001 to D7600) *.
08 Loopback test This is used to check the communication connection.
15 Writing of multiple I relays Up to 256 registers can be written continuously (I4001 to I7072).
16 Writing of multiple D registers Up to 50 registers can be written continuously (D0001 to D7600) *.
66 Random reading Up to 100 registers can be read at random (D0001 to D7600) *.
67 Random writing Up to 50 registers can be read at random (D0001 to D7600) *.
68 Specify monitor
Up to 100 registers can be specified at random for monitoring (D0001
to D7600) *.
69 Monitoring The register specified by “specify monitor” is read.
70
Writing of multiple D registers for
program pattern
Up to 80 D registers can be written continuously (D8001 to D9000).
*: When UP55A/UP35A; D0001 to D9000
Function codes cannot be written to read-only or use-disabled registers.
4.4.2 Specifying D Registers
Specify D registers from the host computer by the following procedure:
(1) When using SCADA etc. commercially available, specify the Ref No. described in the
following chapter.
Chapter 6, “Functions and Applications of D Registers (for UT55A/UT52A/UP55A).”
Chapter 8, “Functions and Applications of D Registers (for UT35A/UT32A/UT32A-D/
UP35A/UP32A).”
Chapter 14, “Functions and Applications of D Registers (for UT75A).”
(2) When using a communication program made by the user. commercially available,
specify the H-No. described in the following chapter.
Chapter 6, “Functions and Applications of D Registers (for UT55A/UT52A/UP55A).”
Chapter 8, “Functions and Applications of D Registers (for UT35A/UT32A/UT32A-D/
UP35A/UP32A).”
Chapter 14, “Functions and Applications of D Registers (for UT75A).”