PFlow Industries D116 User Manual

Revision: 3.0.3
9 Appendix1-
Serial Interface Network Use and Communications Protocol
9.1 Overview
The transmitter has perfect communication
protocol. It can also be connected to a RS
Two basic schemes can be chosen for networking, i.e. the analog current output method only using the flowmeter
or the RS485
communication method via serial port directly using the flowmeter. The former is sui
dated instruments in old monitoring networks. The later is used in new monitoring network systems. It has
advantages such as low hardware investment and reliable system operation.
When the serial port communication method is directly used
address identification code (in window M46) of the flowmeter is used as network address code. Expanded
command set with [W] is used as communication protocol. Thus analog current loop and OCT output of
flowmete
r can be used to control the opening of a control valve. The relay output can be used to power
other equipment. The analog input of the system can be used to input signals such as pressure and temperature.
The system provides an RTU function for flo
RS-485(0~
1000m) can be directly used for data transmission link for a short distance.
The command answer mode is used in data transmission, i.e. the host device issues commands and the flowmeter
answers correspondingly.
9.2 Direct connection via RS-
485
Drawing of Upper Computer
Notices:
When the flowmeter is in flowmeter network ,the following network IDN:
42(2AH*) and 38(26H&)
. The Network IDN is set in
9.3
Communication protocol and the use
The communication protocol format used by the ultrasonic flowmeter is an expanded set of the Fuji FLV series
flowmeter protocol.
The host device requests the flowmeter to answer by sending a
asynchronous communication (Primary station
single byte data format (10 bits): one start bit, one stop bit and 8 data bits. Check bit:
DC+ DC-
GE
DC 10 -36V
OCT+ OCT-
OCT OUT
RL+ RL-
RELAY
D116
Series Ultrasonic Flowmeter
Serial Interface Network Use and Communications Protocol
protocol. It can also be connected to a RS
-485.
Two basic schemes can be chosen for networking, i.e. the analog current output method only using the flowmeter
communication method via serial port directly using the flowmeter. The former is sui
dated instruments in old monitoring networks. The later is used in new monitoring network systems. It has
advantages such as low hardware investment and reliable system operation.
When the serial port communication method is directly used
to implement a monitoring network system, the
address identification code (in window M46) of the flowmeter is used as network address code. Expanded
command set with [W] is used as communication protocol. Thus analog current loop and OCT output of
r can be used to control the opening of a control valve. The relay output can be used to power
other equipment. The analog input of the system can be used to input signals such as pressure and temperature.
The system provides an RTU function for flo
w measurement.
1000m) can be directly used for data transmission link for a short distance.
The command answer mode is used in data transmission, i.e. the host device issues commands and the flowmeter
485
to the host device
Drawing of Upper Computer
RS-485 network data acquisition system
When the flowmeter is in flowmeter network ,the following network IDN:
13(0DH ENTER), 10(
0AH
. The Network IDN is set in
M46.
Communication protocol and the use
The communication protocol format used by the ultrasonic flowmeter is an expanded set of the Fuji FLV series
The host device requests the flowmeter to answer by sending a
"command"
. The baud rate of
asynchronous communication (Primary station
;
computer system; ultrasonic flowmeter) is generally 9600BPS. A
single byte data format (10 bits): one start bit, one stop bit and 8 data bits. Check bit:
NONE.
PC
RS485turn RS232
E UP+ UP-
E DN+ DN-
TRANSDUCER
Tx Rx GND
RS232(RS485)
A B
I+ I-
4-20mA
Series Ultrasonic Flowmeter
Page 41 of 53
Serial Interface Network Use and Communications Protocol
Two basic schemes can be chosen for networking, i.e. the analog current output method only using the flowmeter
communication method via serial port directly using the flowmeter. The former is sui
table to replace
dated instruments in old monitoring networks. The later is used in new monitoring network systems. It has
to implement a monitoring network system, the
address identification code (in window M46) of the flowmeter is used as network address code. Expanded
command set with [W] is used as communication protocol. Thus analog current loop and OCT output of
r can be used to control the opening of a control valve. The relay output can be used to power
-on/off
other equipment. The analog input of the system can be used to input signals such as pressure and temperature.
The command answer mode is used in data transmission, i.e. the host device issues commands and the flowmeter
0AH
NEWLINE),
The communication protocol format used by the ultrasonic flowmeter is an expanded set of the Fuji FLV series
. The baud rate of
computer system; ultrasonic flowmeter) is generally 9600BPS. A

PFlow Industries D116 Specifications

General

Brand	PFlow Industries
Model	D116
Category	Measuring Instruments
Language	English