CR#
RS-485
parameters
address
Latched Register name b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
#31 H’4051 ○ R/W Communication address setting
Used to set RS-485 communication address. The setting range
is from 01 to 254 and the default setting is K1.
#32 H’4052 ○ R/W Communication format setting
It is used to set communication format.
For baud rate, the settings are
4,800/9,600/19,200/38,400/57,600/115,200 bps.
Communication format:
For DVP04DA-S:
ASCII：7,E,1 / 7,O,1 / 8,E,1 / 8,O,1 / 8,N,1
RTU ：8,E,1 / 8,O,1 / 8,N,1
For DVP04DA-S2
ASCII：7,E,1 / 7,O,1 / 7,N,1 / 8,E,1 / 8,O,1 / 8,N,1 / 7,E,2 /
7,O,2 / 7,N,2 / 8,E,2 / 8,O,2 / 8,N,2
RTU ：8,E,1 / 8,O,1 / 8,N,1 / 8,E,2 / 8,O,2 / 8,N,2
Factory default : ASCII,9600,7,E,1 (CR#32=H’0002)
Refer to ※CR#32 communication format settings at the end of
this table for more information.
#33 H’4053 ○ R/W
Reset to default setting and set
characteristics adjustable priority
Reserved CH4 CH3 CH2 CH1
Output latched setting, default setting H’0000.
Give CH1 setting for example:
1. When b0=0, user can set OFFSET and GAIN value of CH1
(CR#18, CR#24). When b0=1, inhibit user to adjust OFFSET
and GAIN value of CH1 (CR#18, CR#24).
2.
The value of b1 determines whether a characteristic register is
latched while using RS485 to read-write control registers. b1=0
(latched), b1=1 (not latched).
3. When b2 is set to 1, all settings are reset to default setting.
CR#33 is used to set the internal function priority. For example: characteristic register. Output latched function will save output setting
to the internal memory before power loss.
#34 H’4054 ○ R Software version.
Show software version in hexadecimal.
For example: H’010A means 1.0A.
#35 ~ #48 System used
Symbols: ○ means latched. (Only valid when written in via RS-485 communication) ╳ means not latched.
R means can read data by using FROM instruction via RS-485.
W means can write data by using TO instruction via RS-485.
LSB (Least Significant Bit): 1. Voltage output: 1
LSB
=10V/8,000=2.5mV. 2. Current output: 1
LSB
=20mA/4,000=5μA.
※ Added the RESET function for 04DA-S modules with firmware V4.12 or later and 04DA-S2 with firmware V4.16 or later. Connect the
module power input to 24 VDC and write H’4352 into CR#0 and then turn the power off and on again; all parameters in modules,
including communication parameters are restored to factory defaults.
※ The corresponding parameters address H’4032 ~ H’4054 of CR#0 ~ CR#34 are provided for users to read/ write data via RS-485.
※ Function codes: 03’H is for reading data from registers. 06’H is for writing a word data into registers. 10’H is for writing multiple word
data into registers.
※ If you want to use Modbus address in decimal format, you can transfer a hexadecimal register to decimal format and then add one to
have it become a decimal Modbus register address. For example, transferring the address “H’4032” of CR#0 in hexadecimal format
to decimal format, to have the result 16434 and then adding one to it, you have 16435, the Modbus address in decimal format.
※ DVP04DA-S CR#32 communication format settings: for modules with firmware V4.10 or previous versions, b11~b8 data format
selection is not available. For ASCII mode, the format is fixed to 7, E, 1 (H’00XX) and for RTU mode, the format is fixed to 8, E, 1
(H’C0xx/H’80xx). For modules with firmware V4.11 or later, refer to the following table for setups. Note that the original code
H’C0XX/H’80XX will be seen as RTU, 8, E, 1 for modules with firmware V4.11 or later.
b15 ~ b12 b11 ~ b8 b7 ~ b0
ASCII/RTU,
exchange low & high byte of CRC check code
Data format Baud rate
Description
H'0 ASCII H'0 7,E,1*
1
H'01 4800 bps
H'8
RTU,
do not exchange low and high byte of
CRC check code
H'1 8,E,1 H'02 9600 bps
H'2 reserved H'04 19200 bps
H'C
RTU,
exchange low and high byte of CRC
check code
H'3 8,N,1 H'08 38400 bps
H'4 7,O,1*
1
H'10 57600 bps
H'5 8.O,1 H'20 115200 bps
Note *1: This is only available for ASCII format.
Ex: Write H’C310 into CR#32 for a result of RTU, exchange low and high byte of CRC check code, 8,N,1 and baud rate at 57600 bps.
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