ABB COMMANDER 310 Manuale utente
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COMMANDER 310
Universal
Process Controller
Operating Guide
MODBUS (RTU)
Communications Option
COMMANDER 310
A1 A2 L R ST M
47.5
50.0
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ABB
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BS EN ISO 9001
Cert. No. Q5907
The Company
We are an established world force in the design and manufacture of
instrumentation for industrial process control, flow measurement,
gas and liquid analysis and environmental applications.
As a part of ABB, a world leader in process automation technology,
we offer customers application expertise, service and support
worldwide.
We are committed to teamwork, high quality manufacturing,
advanced technology and unrivalled service and support.
The quality, accuracy and performance of the Company’s products
result from over 100 years experience, combined with a continuous
program of innovative design and development to incorporate the
latest technology.
TheNAMASCalibrationLaboratoryNo.0255(B)isjustoneoftheten
flow calibration plants operated by the Company, and is indicative of
ABB Instrumentation's dedication to quality and accuracy.
Health and Safety
To ensure that our products are safe and without risk to health, the following points must be noted:
1. The relevant sections of these instructions must be read carefully before proceeding.
2. Warning labels on containers and packages must be observed.
3. Installation,operation,maintenanceandservicingmustonlybecarriedoutbysuitablytrainedpersonneland
in accordance with the information given.
4. Normal safety precautions must be taken to avoid the possibility of an accident occurring when operating in
conditions of high pressure and/or temperature.
5. Chemicals must be stored away from heat, protected from temperature extremes and powders kept dry.
Normal safe handling procedures must be used.
6. When disposing of chemicals ensure that no two chemicals are mixed.
Safetyadviceconcerningtheuseoftheequipmentdescribedin this manual or any relevant hazard data sheets
(where applicable) may be obtained from the Company address on the back cover, together with servicing and
spares information.
✶
Note.
Clarification of an instruction or additional
information.
Information.
Further reference for more detailed information or
technical details.
Although Warning hazards are related to personal injury, and Caution hazards are associated with equipment or
property damage, it must be understood that operation of damaged equipment could, under certain operational
conditions,resultindegradedprocesssystemperformanceleadingtopersonalinjuryordeath. Therefore,comply
fully with all Warning and Caution notices.
Informationinthis manualisintendedonly toassistourcustomers intheefficientoperation ofourequipment.Use
of this manual for any other purpose is specifically prohibited and its contents are not to be reproduced in full or
part without prior approval of the Technical Communications Department.
Stonehouse, U.K. – Cert. No. 0255
EN 29001 (ISO 9001)
Lenno, Italy – Cert. No. 9/90A
Use of Instructions
Warning.
An instruction that draws attention to the risk of
injury or death.
Caution.
An instruction that draws attention to the risk of
damage to the product, process or surroundings.
Licensing, Trademarks and Copyrights
MODCELL™ and PC-30™ are trademarks of Asea Brown Boveri, Inc.
Modbus™ is a trademark of Modicon, Inc.
IBM™ and IBM PC AT™ are trademarks of International Business Machines Corp.
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1
CONTENTS
Section Page
1 INTRODUCTION .................................. 2
2 ELECTRICAL INSTALLATION........... 2
2.1 Selection of Serial
Communication Adaptors for
Personal Computers.................... 2
2.2 Recommended
OPTO22 Boards .......................... 3
2.3 Pull-up and Pull-down
Resistors...................................... 3
2.4 Termination Resistors.................. 4
2.5 RS485/422 Standard ................... 4
2.6 Serial Connections ...................... 5
3 PROGRAMMING ................................. 6
3.1 Serial Data Communication
Page .......................................... 7
4 MODBUS PROTOCOL ........................ 8
4.1 Introduction to MODBUS Protocol8
4.1.1 Non-volatile Memory
Limitations ........................ 8
4.2 MODBUS Function Codes .......... 9
Section Page
5 MODBUS FUNCTIONS ..................... 10
5.1 Read Coil Status –
Function Code 01 ...................... 10
5.1.1 Read Coil Status Query . 10
5.1.2 Read Coil Status
Response ....................... 10
5.2 Read Holding Register –
Function Code 03 .......................11
5.2.1 Read Holding
Register Query ................ 11
5.2.2 Read Holding
Register Response .........11
5.3 Force Single Coil –
Function Code 05 ...................... 12
5.3.1 Force Single Coil Query. 12
5.3.2 Force Single
Coil Response................ 12
5.4 Preset Single Register –
Function Code 06 ...................... 13
5.4.1 Preset Single Register
Query.............................. 13
5.4.2 Preset Single Register
Response ....................... 13
5.5 Loopback Test –
Function Code 08 ...................... 14
5.5.1 Loopback Test Query ..... 14
5.5.2 Loopback Test
Response ....................... 14
5.6 Write Multiple Coils –
Function Code 15 ...................... 14
5.6.1 Write Multiple Coils
Query.............................. 14
5.6.2 Write Multiple Coils
Response ....................... 15
5.7 Write Multiple Registers –
Function Code 16 ...................... 15
5.7.1 Write Multiple Register
Query.............................. 15
5.7.2 Write Multiple Registers
Response ....................... 15
6 EXCEPTION RESPONSES ............... 16
6.1 Examples .................................. 16
7 MODBUS REGISTERS...................... 17
7.1 Coils ........................................ 17
7.2 Holding Registers ...................... 18
7.3 Controller Settings/Outputs ....... 19
7.4 Alarm Settings ........................... 20
7.5 Ramp/Soak Settings.................. 20
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2
1 INTRODUCTION
Information.
• Serial data communication option
designed for use with SCADA
systems.
• RS422/485 Communication standard.
• MODBUS RTU protocol – for master
(host computer) to slave
(COMMANDER 310) system.
• Isolated (500V) from rest of
instrument.
• 5-wire communication supported.
• Baud rate – from 1200 to 9600.
• Parity-checking – odd, even or none.
2 ELECTRICAL INSTALLATION
2.1 Selection of Serial
Communication Adaptors for
Personal Computers
Information.
• An RS422/485 communication board
is required in the host PC.
• Observe the limitations outlined in the
Installation Guide
–the maximum serial
data transmission line length for both
RS422 and RS485 systems is 1200m.
An RS422/485 communications adaptor is
required for serial links. It is strongly
recommended that the card used has
galvanic isolation to protect the computer
from lightning damage and increase
immunity from noise pick-up.
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3
2 ELECTRICAL INSTALLATION…
2.2 Recommended OPTO22 Boards
The following OPTO22 boards are recommended:
Part No. Computer Type
AC24 AT AT Bus IBM PC compatible
AC34 Microchannel IBM PC
2.3 Pull-up and Pull-down Resistors – Fig. 2.1
To prevent false triggering of the slave wall-/ pipe-mounted controller by the presence of
noise when the master (host computer) is inactive, 1.8K pull-up and pull-down resistors must
be fitted to the RS422/485 adaptor card –see Fig. 2.1.
Fig. 2.1 Pull-up and Pull-down Resistors
GND
Rx+
Rx–
Tx+
Tx–
COMMANDER 310
Computer Terminal or Host Computer
+5V
0V
'A' 'B'
1.8kΩ
Pull-down
Resistor
1.8kΩ
Pull-up
Resistor
0V
+5V
0V
'A'
'B'
1.8kΩ
Pull-down
Resistor
1.8kΩ
Pull-up
Resistor
18 19 20 21 22 23
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4
…2 ELECTRICAL INSTALLATION
2.4 Termination Resistors – Fig. 2.2
For long transmission lines, termination resistors are required on the last slave in the chain –
see Fig. 2.2A. The slave termination resistors are selected using plug-in links (PL2) on the
serial option board –see Fig. 2.2B.
2.5 RS485/422 Standard
The RS485 standard quotes connection of thirty two slaves maximum, to any single driver
(computer terminal or host computer); the RS422 standard quotes connection of up to ten
slaves. However, these numbers can be increased if the driver’s serial port permits.
Fig. 2.2 Selecting the Slave Termination Resistor
B – Termination Resistor Link Positions
A – Schematic Diagram
Internal Termination Resistor
Identify Links
Linked-out
Position links
Linked-in
PL2
1
8
4
5
PL2
1
8
4
5
1
8
4
5
PL2
Serial Option Board
Termination Resistors
1
2
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5
2.6 Serial Connections – Fig. 2.3
Information.
•Up to 10 slaves can be connected to a single RS422 adaptor card on a PC.
•Up to 32 slaves can be connected to a single RS485 adaptor card on a PC.
•The maximum serial data transmission line length for both RS422 and RS485 systems
is 1200m.
All connections, apart from those for serial data communication, are made as shown in
Section
4
of the Installation Guide
.
Make serial data connections as shown in Fig. 2.3. The type of cable used is dependent on the
cable length:
Up to 6m –standard screened or twisted pair cable.
Up to 300m –twin twisted pair with overall foil screen and an integral drain
wire, e.g. Belden 9502 or equivalent.
Up to 1200m –twintwistedpairwithseparatefoilscreensandintegraldrain wires
for each pair, e.g. Belden 9729 or equivalent.
2 ELECTRICAL INSTALLATION
Fig. 2.3 Serial Board Terminal Block Connections
Rx+
Rx–
Tx–
Tx+
GND
8
9
5
4
3
OPTO22 Adaptor
Board Connections
Screen
Rx+
Rx–
Tx+
Tx–
COMMANDER 310
18 19 20 21 22 23
GND
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6
3 PROGRAMMING
Fig. 3.1 Location of Serial Data (RS485) Communications Page
SErIAL
BAUd
OFF
IdEnt
1
PArItY
odd
PAGE
SCALE
AdJUSt
LINE
FAILEd
ACKNLG
ALArMS
SECOdE
0
SELF
tUNE
ContrL
PAGE
PrOFLE
PrOGM
SEt
POINtS
SEtUP
PrCESS
rSPt
ACCESS
PAGE
rEtrAN
OUtPUt
SEtUP
ALArMS
SEtUP
CONtrL
dISPLY
PAGE
SEtUP
Refer to
Operating Guide
Refer to
Programming Guide
Refer to
Programming Guide
Refer to
Programming Guide
Operating Page Alarm Acknldg.
Page Security Code
Page Self-tune Page Control Page Profile Program
Page Set Points Page Set Up PV Page
Set Up RSPT
Page
Display PageSet Up Control
Page
Set Up Alarms
Page
Retrans. O/P
Page
Serial Page
Section 3, opposite
Scal Adjust PageAccess Page
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7
3.1 Serial Data Communication Page
Information.
•Programmable baud rate (1200 to 9600 baud).
•Odd or even parity.
The general programming procedure is as detailed in the
Operating Guide
. In this Section,
parameters in the lower display denoted ■are Company Standard Settings. The instrument is
dispatched programmed with these settings.
3 PROGRAMMING
Page Header –Serial Page.
Transmission Rate
Select the transmission rate required (1200 slowest, 9600
fastest).
Select OFF to disable Serial Communications.
Controller Identification
Assign the controller an identification number between 1
and 99.
Parity
Select the appropriate parity to match the computer
terminal or host computer.
Return to Serial Page frame
or
advanced to Scale Adjust Page –see
Operating Guide
.
BAUD
OFF
9600
4800
2400
1200
PArItY
EVEN
Odd
NONE
SErIAL
PAGE
IdENt
1
SCALE
AdJUSt
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