VorTek SonoPro S36 Series, Instruction Manual

Page: 60 / 107

Series S36 Instruction Manual Chapter 4 Serial Communications
800120 4-3
TCP/IP to RTU), the procedure (Start-up Guide - ProtoCessor
FPC-ED2) to do so can be found at www.vortekinst.com. The
MSA Safety ProtoCessor can be seen in Figure 4-3.
Figure 4-3: MSA Safety ProtoCessor Module
Overview
This document describes the preliminary implementation of the
Modbus communication protocol for use in monitoring common
process variables in the VorTek SonoPro® Professional Series
Flow Meter. The physical layer utilizes the half-duplex RS-485
port, and the Modbus protocol.
Reference Documents
The following documents are available online from
www.modbus.org .
Modbus Application Protocol Specification V1.1
Modbus Over Serial Line Specification & Implementation Guide
V1.0
Modicon Modbus Protocol Reference Guide PI
– MBUS – 300 Rev. J
Wiring
An RS485 daisy chained network configuration as depicted below
is recommended. Do not use a star, ring, or cluster arrangement.
RS-485 -
RS-485 +
RS-485 GND
RS-485 Master
Vortex Meter
R
S
-4
8
5
-
R
S
-4
8
5
+
R
S
-4
8
5
G
N
D
R
S
-4
8
5
-
R
S
-4
8
5
+
R
S
-4
8
5
G
N
D
Other Device 2, etc.
R
S
-4
8
5
-
R
S
-4
8
5
+
R
S
-4
8
5
G
N
D
Other Device 1
Figure 4-4. RS-485 Wiring (MODBUS)