Bell VFM60 Series, User Introduction Manual

Page: 30 / 59

VFM-60
Vortex Flowmeter
Rev1.3
Date:24/04/2020 User’s Manual
30 / 59
CRCH
：
CRC parity code higher CRCL : CRC Parity code lower
CRCH
：
CRC parity code higher
Note: To read a float date, the quantity of the register address and its value have to be even, or
reponse will be error.
Function code 04 – Same as function code 03
Function code 06
– write one register
Request Response
01 : Address 01: Address
06 : Function code 06 : Function code
00 : Register address higher 00 : Register address higher
01 : Register address lower (code setting address) 01 : Register address lower
00 : Value higher 00 : Value higher
04 : Value lower 04 : Value lower
CRCH
：
CRC parity code higher CRCH
：
CRC parity code higher
CRCL : CRC Parity code lower CRCL : CRC Parity code lower
Note: Function code is only supported for writing short dater.
Function code 16 - write multi register.
Request Response
01 : Address 01: Address
10H : Function code 10H : Function code
00 : Register address higher 00 : Register address higher
01 : Register address lower (digital setting address) 01 : Register address lower
00 : Quantity of register higher 00 : Quantity of register higher
02 : Quantity of register lower 02 : Quantity of register lower
04 : Quantity of values
CRCH
：
CRC parity code higher
86h : Value 1 CRCL : CRC Parity code lower
00 : Value 2
00 : Value 3
48H: Value 4
CRCH
：
CRC parity code higher
CRCL : CRC Parity code lower
Note: Function code 16 is supported to write both short date and float date. But for float date,the
first register address and the quantity of the registers must be even, or writing is not allowed.
6.3 Calculation of CRC parity code.
Request Response
01 : Address N1 CRC=0FFFFH is initial value
10 : Function code N2 XOR operation the CRCL and N1