WEG Electric SSW06 Serial Communications Instruction Manual
Soft-Starter
SSW-06 V1.6X
Serial Communication Manual
Language: English
Document: 0899.5731 / 04
Motors | Energy | Automation | Coatings
Serial Communication Manual
Series: SSW-06 V1.6X
Language: English
Document Number: 0899.5731 / 04
Publication Date: 08/2009
Summary
SUMMARY
INFORMATION ABOUT THE MANUAL.......................................................... 5
GENERAL INFORMATION............................................................................................................................. 5
SAFETY INFORMATION ................................................................................................................................5
USED TERMS .................................................................................................................................................5
NUMERICAL PRESENTATION...................................................................................................................... 5
1 INTRODUCTION........................................................................................... 6
2 SOFT-STARTER SSW-06 PARAMETER SETTING..................................... 7
2.1 P308 – SOFT-STARTER SSW-06 ADDRESS ON THE NETWORK ....................................................... 7
2.2 P312 – SERIAL PROTOCOL TYPE AND COMMUNICATION RATE..................................................... 7
2.3 P313 – ACTION FOR COMMUNICATION ERROR................................................................................. 7
2.4 P314 – TIME FOR TIMEOUT DURING THE MESSAGE RECEPTION................................................... 8
2.5 P220 – LOCAL/REMOTE SELECTION.................................................................................................... 8
2.6 P229 – COMMAND SELECTION – LOCAL MODE.................................................................................8
2.7 P230 – COMMAND SELECTION – REMOTE MODE..............................................................................9
3 INTERFACE DESCRIPTION....................................................................... 10
3.1 RS-232 .................................................................................................................................................... 10
3.2 RS-485 .................................................................................................................................................... 10
3.2.1 Use of the RS-485 Kit for the SSW-06 ........................................................................................ 10
4 ACCESSIBLE DATA VIA SERIAL COMMUNICATION ............................. 12
4.1 PARAMETER OF THE SOFT-STARTER SSW-06 ................................................................................ 12
4.2 AVAILABLE BASIC VARIABLES FOR THE SOFT-STARTER SSW-06 ...............................................12
4.2.1 Basic Variable 0............................................................................................................................. 12
4.2.2 Basic Variable 1............................................................................................................................. 12
4.2.3 Basic Variable 3............................................................................................................................. 13
4.2.4 Basic Variable 6............................................................................................................................. 14
4.2.5 Basic Variable 7............................................................................................................................. 14
4.2.6 Basic Variable 8............................................................................................................................. 15
4.2.7 Basic Variable 9............................................................................................................................. 15
4.2.8 Basic Variable 10........................................................................................................................... 15
4.3 CHANGING OF PARAMETERS AND BASIC VARIABLES................................................................... 15
4.4 VALUES OF THE PARAMETERS ..........................................................................................................16
5 MODBUS-RTU PROTOCOL ...................................................................... 17
5.1 TRANSFER MODES ............................................................................................................................... 17
5.2 MESSAGE STRUCTURE IN RTU MODE .............................................................................................. 17
5.2.1 Address .......................................................................................................................................... 17
5.2.2 Function Code ............................................................................................................................... 17
5.2.3 Data Field....................................................................................................................................... 18
5.2.4 CRC ................................................................................................................................................18
5.2.5 Times Between Messages ........................................................................................................... 18
5.3 OPERATION OF THE SOFT-STARTER SSW-06 ON THE MODBUS-RTU NETWORK ..................... 18
5.3.1 Available Functions and Response Times .................................................................................19
5.3.2 Data Addressing and Offset......................................................................................................... 19
5.4 DETAILED FUNCTION DESCRIPTION ................................................................................................. 20
5.4.1 Function 01 – Read Coils.............................................................................................................. 21
5.4.2 Function 03 – Read Holding Register .........................................................................................21
5.4.3 Function 05 – Write Single Coil....................................................................................................22
5.4.4 Function 06 – Write Single Register ............................................................................................ 23
5.4.5 Function 15 – Write Multiple Coils............................................................................................... 23
5.4.6 Function 16 – Write Multiple Registers....................................................................................... 24
5.4.7 Function 43 – Read Device Identification ................................................................................... 25
Summary
5.4.8 Communication Errors ................................................................................................................. 26
APPENDIXES................................................................................................................................................ 28
Information About the Manual
INFORMATION ABOUT THE MANUAL
This Manual provides all information required for the Soft-Starter SSW-06 operation using the serial
communication.
GENERAL INFORMATION
■ Read this manual before installing or operating the Soft-Starter SSW-0.
■ All information and safety notice included in this Manual must be strictly followed.
■ To ensure physical integrity during operation and avoid damage to equipment and motors driven by the Soft-
Starters SSW-06, provide electromechanical safety devices.
SAFETY INFORMATION
■ Follow strictly all information given in this Manual relating to the cable interconnection of the two interfaces for
the serial communication.
■ Electronic boards are fitted with components that are sensitive to electrostatic discharge. When these boards
are handled, take following cares:
- Do not touch the components or connections (connectors) directly with the hands. When this is
unavoidable, touch before a grounded metallic object or adopt proper grounding procedures.
- Use always soldering iron with grounded tip.
USED TERMS
■ Parameters
the Human-Machine-Interface (HMI).
■ Basic Variables
communication. The basic variables are used for monitoring the status, commands and equipment
identification.
■ Registers
the basic variables and the parameters.
■ EEPROM:
switched off.
NUMERICAL PRESENTATION
■ Decimal numbers are represented by means of digits without suffix.
■ Hexadecimal numbers are represented through the letter ’h’ after the number.
: are those existing in the Soft-Starters SSW-06 and that can be displayed or changed through
: internal Soft-Starter SSW-06 values that can be accessed only through the serial
: are internal memory addresses of the Soft-Starter. These registers can be used for representing
is the non-volatile memory that saves the Soft-Starter SSW-06 parameter even when equipment is
SSW-06 | 5
Introduction
1 INTRODUCTION
The main purpose of the serial communication is the physical connection between two or more equipments on
the network configured as follows:
MESTRE
PC, CLP, etc.
SLAVE 1
(Soft-Starter 1)
By using this interface, the network master can request several services from every slave connected on the
network. These services may be:
■ IDENTIFICATION:
- Equipment Type (frequency inverter, servoconverter, soft-starter)
- Status monitoring
- Error read
■ PARAMETER SETTING
- Parameter read (current, voltage, etc.)
- Parameter write for equipment configuration
■ COMMANDS
- Enable
- FWD/REV
-
Error Reset
The Soft-Starter SSW-06 uses the Modbus-RTU protocol for the communication through the serial interface.
This protocol allows the Soft-Starter SSW-06 integration into different systems, enabling the connection of
several equipments, such as:
■ PC (master) for the parameter setting of one or various Soft-Starters SSW-06 simultaneously.
■ SDCD monitoring Soft-Starter SSW-06 variables and parameters.
SLAVE 2
(Soft-Starter 2)
. .
SLAVE N
(Soft-Starter N)
SSW-06 | 6
Soft-Starter SSW-06 Parameter Setting
2 SOFT-STARTER SSW-06 PARAMETER SETTING
Please find below the description of the parameter related to the serial communication and the operation via
Modbus-RTU Protocol of the Soft-Starter SSW-06.
2.1 P308 – SOFT-STARTER SSW-06 ADDRESS ON THE NETWORK
Each slave on the Network shall have a different address, so the master is able to sent the desired message to
the specific slave on the network. This parameter allows setting the Soft-Starter SSW-06 address on the
network.
Adjustable Range Standard Value Access
1 ... 247 1 Read/Write
The use of a repeater is required if more than 30 equipments are used the same communication network.
2.2 P312 – SERIAL PROTOCOL TYPE AND COMMUNICATION RATE
The Soft-Starter SSW-06 has one of the following options for the serial communication through product serial
interface:
Adjustable Range Standard Value Access
1 = Modbus-RTU, 9600 bit/s, no parity
2 = Modbus-RTU, 9600 bit/s, odd parity
3 = Modbus-RTU, 9600 bit/s, even parity
4 = Modbus-RTU, 19200 bit/s, no parity
5 = Modbus-RTU, 19200 bit/s, odd parity
6 = Modbus-RTU, 19200 bit/s, even parity
7 = Modbus-RTU, 38400 bit/s, no parity
8 = Modbus-RTU, 38400 bit/s, odd parity
9 = Modbus-RTU, 38400 bit/s, even parity
It is required that all equipments, operating on the same network, have the same communication configuration.
2.3 P313 – ACTION FOR COMMUNICATION ERROR
This parameter allows programming an action that the drive shall adopt when a communication error is
detected.
Adjustable Range Standard Access
0 = No action
1 = Disable
2 = General disable
3 = Changes to LOC
4 = Not used
5 = Fatal error
■ 0 – No action: if some of the above mentioned error is detected, the drive remains in the current status and
only the detected error is displayed.
■ 1 – Disable: SSW-06 will be disabled via voltage ramp when a communication error is detected.
■ 2 – General Disable: in this option, the starter disconnects the motor power supply and the motor will stop
through inertia.
■ 3 – Changes to LOC: when the switch is operating in remote mode and a communication error is detected,
it must change automatically to Remote Mode.
■ 4 – Not used: the same action of the 0 option.
■ 5 – Cause Fatal Error: when detecting imperfection in the communication the Soft-Starter SSW-06 will go
for the error state, the motor will be disabled and the indication of error will only be removed after to reset the
error of the equipment.
For the serial interface, only the t
be considered as communication error. The
imeout
error during the reception (E28 – Serial Communication is inactive) will
timeout
during the reception is set through the Parameter P314.
0 Read/Write
1 Read/Write
SSW-06 | 7
Soft-Starter SSW-06 Parameter Setting
NOTE!
The commands Disable and Change to LOC can be executed only when these commands are
controlled via serial communication. This setting is executed through the Parameters P220, P229 e
P230.
2.4 P314 – TIME FOR TIMEOUT DURING THE MESSAGE RECEPTION
This function allows programming the time for the
(zero) disables this function.
When the drive is controlled via serial communication and a communication problem to the Master is detected
(cable rupture, voltage drop, etc.), it will not be possible to send a command to the serial for the equipment
disable. In application where this will be a problem, you can set P314 to a longer interval within the SSW-06 can
receive a valid serial message. Otherwise SSW-06 will interpret this as a serial communication error.
Adjustable Range Standard Value Access
0 = Disabled function
0 ... 999 seconds
When this time has been programmed, however the SSW-06 remains for longer time than the programmed one
without receiving valid serial messages, it will display E28 and it will adopt the action programmed in P313. After
the communication is restored again, the E28 display will be deleted.
NOTES!
■
When this function is disabled, you must ensure that the network master sends messages
periodically to the slave, always considering the set time and thus preventing the timeout error
detection during the communication.
■
The detection of E28 will also reset the values of the basic variables t8, 9 and 10 (see item 4.2).
2.5 P220 – LOCAL/REMOTE SELECTION
timeout
detection during the message reception. The value 0
0 Read/Write
This function enables programming the command source that controls the Local/Remote mode selection.
Adjustable Range Standard Value Access
0 = Always Local
1 = Always Remote
2 = Keypad (standard is local)
3 = Keypad (standard is remote)
4 = DI4...DI5
5 = Serial (standard is local)
6 = Serial (standard is remote)
7 = Fieldbus (standard is local)
8 = Fieldbus (standard is remote)
9 = SoftPLC (standard is local)
10 = SoftPLC (standard is remote)
2 Read/Write
If the control of the operating mode via serial is preferred, you must set this parameter to 5 ou 6. The display
"standard local" or "standard remote" informs which operation mode shall be activated after the equipment has
been started.
2.6 P229 – COMMAND SELECTION – LOCAL MODE
This function allows programming the command source of the Soft-Starter SSW-06 when the Soft-Starter
SSW-06 has been set to Locale mode.
SSW-06 | 8
Soft-Starter SSW-06 Parameter Setting
Adjustable Range Standard Value Access
0 = Keypad
1 = DI
2 = Serial
3 = Fieldbus
4 = SoftPLC
0 Read/Write
If the command control via serial communication in local mode is desired, you must set Parameter P229=2.
2.7 P230 – COMMAND SELECTION – REMOTE MODE
This function enables selecting the Soft-Starter SSW-06 command source when the SSW-06 has been set to
Remote Mode.
Adjustable Range Standard Value Access
0 = Keypad
1 = DI
2 = Serial
3 = Fieldbus
4 = SoftPLC
If the command control via serial communication in local mode is desired, you must set P230 = 2.
0 Read/Write
SSW-06 | 9
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