VFM-60
Vortex Flowmeter
Rev1.3
Date:24/04/2020 User’s Manual
27 / 59
To set a new password, users have to input the correct password twice, the password will become
effective only if the both inputs are the same; or users have to input again. If the power is off during a
password setting process, the password will be 2000 as default. When a password becomes effective,
users have to input the correct password before he can set the flowmeter, please reference to picture 5.6.
If users input incorrect password 3 times consistently, the display will come back to normal display
Picture 5.6 Password input
If a password has been set to a VFM60 vortex flowmeter, users can enter code setting C48=01 to set a
new password.
6 Instruction of RS485 Modbus Communication
6.1 Interface regulation
The communication interface should be RS485, the range of Baud rate should be 1200~115200.
The wiring terminal is “A” and “B”
.
The communication should comply with MODBUS-RTU statute.
The combination of a communication signal: Address code - function code – date segment –
CRC calibration code. The distance between two characters should not be longer than one
character, or it will be considered as the beginning of a new message or the end of a old
message. The message is combined with hexadecimal arrays.
Defination of the dates: Please reference to the chart 6.1 below.
Chart 6.1 Address of the displayed date
Register
address
Usage
Nature
Date type
0~1
Flow rate
Read only
Float
2~3
Frequency
Read only
Float
4~5
Reserved
Read only
Float
6~7
Pressure
Read only
Float
8~9
Temperature
Read only
Float
10~11
Density
Read only
Float
12~13
Reserved
Read only
Float
14~15
Reserved
Read only
Float
16~17
Reserved
Read only
Float
18~19
Reserved
Read only
Float
20~21
Reserved
Read only
Float
22~23
Reserved
Read only
Float
SPI
0000
