YOKOGAWA VZ20X, User Manual

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IM 77V01B01-01EN 5th Edition: 2023.03.07-00
7.2.4 List of Register Assignments
Registers are used in Modbus communication. A host device (e.g. PC) can be accessed
by using Modbus/TCP read and write commands.
VZ20X time data, measured value data, status data, parameter data, and other data are
stored in registers.
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Conventions Used in D Register Tables
The following explains how to view register map tables.
Numerical values arranged vertically in the left side column of the table are (1) register
numbers (reference Nos.).
The second column from the left side column is the (2) Hex number (hexadecimal). This
is obtained by subtracting 40001 from the register number and converting the result to
hexadecimal. (3) R/W indicates reading and writing by Modbus communication.
Operation becomes not fixed when a register other than a register number given in this
table is read. Writing is not possible when writing to a register other than a register
number given in this table is performed.
(1) Register number
(Reference no.)
(2) Hex number
(hexadecimal)
Register name (3) R/W
40001 0000
VZ20X time setting
R/W
40002 0001 R/W
40003 0002 R/W
40004 0003 R/W
40005 0004
VZ20X system clock
R
40006 0005 R
40007 0006 R
40008 0007 R
R: Read only, R/W: Read/Write
Specifying a register number
When communicating with the paperless recorder GX20 or other Modbus devices,
specify the register number (reference number).
When using a communication program created by the user to perform communication,
specify the Hex number (hexadecimal).
Registers are read and written in big-endian bit order.
The following shows the bit arrangement when bits are assigned to four registers and
two registers. When bits are assigned to multiple registers, perform communication by
continuous reading or writing.
・
4 registers and 64 bits (example: register numbers 40001 to 40004)
63 bit
16 bit
40001 Register no.
15 0 bit
0 bit
16 bit
40002
15 0 bit
16 bit
VZ20X time setting
40003
15 0 bit
16 bit
40004
15 0 bit