WEG SSW900 Series Instructions for use

Motors | Automation | Energy | Transmission & Distribution | Coatings
Pump Cleaning
SSW900
Application Manual

Pump Cleaning Application Manual
Series: SSW900
Language: English
Document: 10008639547 / 00
Publication Date: 05/2021

Summary of the Revisions
The information below describes the revisions made to this manual.
Version
Revision
Description
-
R00
First edition

Table of Contents
1PARAMETER STRUCTURE................................................................... 1
2FAULTS AND ALARMS.......................................................................... 2
3GENERAL INFORMATION..................................................................... 3
3.1. ABOUT THE MANUAL........................................................................................................................3
3.2. ABOUT THE PUMP CLEANING APPLICATION ...............................................................................3
4RECOMMENDED SET-UP..................................................................... 4
4.1. COMMANDS BY DI VIA SOFTPLC....................................................................................................4
5PARAMETER DESCRIPTION ................................................................ 5
5.1. STATUS ...............................................................................................................................................5
5.1.1. S6 SOFTPLC......................................................................................................................5
5.2. SETTINGS ...........................................................................................................................................5
5.2.1. C11 SOFTPLC ...................................................................................................................5
6OPERATION..........................................................................................10
6.1. UNCLOGGING WITH COMMAND TO START THE PUMP (C11.3.2 = 1) ......................................10
6.2. UNCLOGGING WITH COMMAND VIA DIGITAL INPUT DI3 (C11.3.2 = 2)....................................11
6.3. UNCLOGGING WHEN DETECTING PUMP CLOGGING (C11.3.2 = 3)..........................................12
7TROUBLESHOOTING ..........................................................................14
7.1. FREQUENT PROBLEMS ..................................................................................................................14

SSW900 | 1
Parameter Structure
1PARAMETER STRUCTURE
Level 1
Level 2
Level 3
Page
S
Status
S6
SoftPLC
S6.1
SoftPLC Status
5
S6.2
Scan Cycle Time
S6.2
Output Value
S6.4
Parameters
C
Settings
C11
SoftPLC
C11.3
Parameters
5

SSW900 | 2
Faults and Alarms
2FAULTS AND ALARMS
Fault/Alarm
Description
Possible Causes
F708/A708:
SoftPLC Application
Stopped
SoftPLC application is not running.
- SoftPLC application is stopped (C11.1 = Stop
Applications).
- SoftPLC status (S6.1.1) indicates that the
application is incompatible with the SSW900
firmware version.
A750
Clogging Detected
It indicates that clogging has been detected through
the pump motor high current.
F751
Excessive Clogging Events Detected
It indicates that the pump has been switched off
due to an excessive number of clogging events.

SSW900 | 3
General Information
3GENERAL INFORMATION
3.1. ABOUT THE MANUAL
This manual contains the necessary information to configure the Pump Cleaning application, developed with the
SoftPLC function of the SSW900 Soft-Starter.
This application manual must be used together with the SSW900 Programming Manual, SSW900 User Manual,
SoftPLC Function Manual and WPS Software Manual.
ABBREVIATIONS AND DEFINITIONS
PLC Programmable Logic Controller
CRC Cycling Redundancy Check
RAM Random Access Memory
USB Universal Serial Bus
WPSProgramming Software in Ladder Language
Copying the content of this manual, in whole or in part, is prohibited without the written permission of the
manufacturer.
3.2. ABOUT THE PUMP CLEANING APPLICATION
The Pump Cleaning application, developed for the SoftPLC function of the SSW900 Soft-Starer and based on the
existing Pump Genius Simplex of the CFW-11, allows unclogging the pump in order to prevent it from reaching
the complete clogging, which would prevent the pump operation.
Its basic principle is to start the pump in the reverse pumping direction to remove the accumulated residues
and, thus, enable the pump to go into operation again.
NOTE!
This function should only be enabled on a pump that can operate in the reverse pumping direction;
otherwise, it may damage it.

SSW900 | 4
Recommended Set-Up
4RECOMMENDED SET-UP
This chapter presents a recommended set-up, which can be used in whole or in part to assemble the desired
drive.
4.1. COMMANDS BY DI VIA SOFTPLC
2-wire commands
C3 - LOC/REM Selection
C3.1 = 8 (Mode = SoftPLC REM)
C3.3 = 3 (REM command =
SoftPLC)
C4 - I/O
C4.2.3 = 14 (DO3 = Circuit
Breaker Trip)
C11 - SoftPLC
C11.3.2 = 1 (Mode 1) or 3
(Mode 3)
C11.3.12 = 0 (2-wire Run/Stop)
3-wire commands
C3 - LOC/REM Selection
C3.1 = 8 (Mode = SoftPLC REM)
C3.3 = 3 (REM command =
SoftPLC)
C4 - I/O
C4.2.3 = 14 (DO3 = Circuit Breaker
Trip)
C11 - SoftPLC
C11.3.2 = 1 (Mode 1) or 3 (Mode
3)
C11.3.12 = 1 (3-wire Run/Stop)
3-wire command and
unclogging via DI
C3 - LOC/REM Selection
C3.1 = 8 (Mode = SoftPLC
REM)
C3.3 = 3 (REM command =
SoftPLC)
C4 - I/O
C4.2.3 = 14 (DO3 = Circuit
Breaker Trip)
C11 - SoftPLC
C11.3.2 = 2 (Mode 2)
C11.3.12 = 1 (3-wire Run/Stop)
NOTES!
Check the electronics power supply. “Control Supply” connector.
Optional. It is recommended to use a PTC, thermostat connected to a digital input programmed for external fault or PT100
accessory.
Run/Stop command via digital input DI1 with 2 wires via SoftPLC.
Run/Stop command via digital input DI with 3 wires via SoftPLC. Run DI1 and Stop DI2.
Activation of the pump unclogging via pulse at digital input DI3.
Use a digital output programmed for "Circuit Breaker Trip" fault to open the circuit breaker when a fault occurs on the SSW
power circuit.
In case of maintenance on the SSW or on the motor, it is necessary to disconnect the power supply input so as to ensure the
full disconnection of the equipment from the supply line.
In case of damages on the SSW power circuit which keep the motor running by short circuit, the motor protection is
obtained by using the power isolation contactor (K1) or circuit breaker (Q1) controlled by the SSW.
Coordination Type 1 – use a circuit breaker for short circuit protection on the input circuit.
Use a shunt trip on the circuit breaker to open the circuit breaker via digital output of the SSW.
Optional. Coordination Type 2 – use aR high speed fuses for semiconductor protection.

SSW900 | 5
Parameter Description
5PARAMETER DESCRIPTION
Only the user parameters of the SoftPLC Application will be described here. For more details on the other
parameters of the SSW900, see the SSW900 Programming Manual.
5.1. STATUS
5.1.1. S6 SOFTPLC
Status parameters related to the SoftPLC.
S6.1 SoftPLC Status
.1 Current
0 ... 4
Description
Status in which the SoftPLC is. If no application is installed, the other parameters will not be shown on the HMI.
.1 Current Status in which the SoftPLC is.
If this parameter shows option 2 (“Incomp. Applic.”), it indicates that the version that has been loaded into the
memory is not compatible with the current SSW firmware.
In this case, the users need to recompile their project in the WPS considering the new SSW version and
download it again.
Indication
Description
0 = Without
Application
No application recorded.
1 = Install. Applic.
Installing application.
2 = Incomp. Applic.
Application version loaded into the memory is not compatible with the current SSW firmware.
3 = Applic. Stopped
Application is not running.
4 = Applic. Running
Application is running.
S6.2 Scan Cycle Time
.1 Current
0 ... 65535 ms
Description:
Runtime of the application software.
.1 Current It is the runtime of the application software. The larger the application, the longer the runtime is likely
to be.
S6.4 Parameters
.1 Software Version
0 ... 9.99
Description:
It indicates the software version of the SoftPLC application.
5.2. SETTINGS
5.2.1. C11 SOFTPLC

SSW900 | 6
Parameter Description
Setting parameters related to the SoftPLC.
C11 SoftPLC
C11.1 Mode
Adjustable Range:
0 ... 1
Factory Setting:
0
Properties:
Stopped
Description:
It allows stopping or running an application installed, but the motor must be disabled in order to do that.
Indication
Description
0 = Stop Application
It stops the application
1 = Run Application
It runs the application
C11 SoftPLC
C11.2 App Not Running Action
Adjustable Range:
0 ... 2
Factory Setting:
0
Properties:
Description:
It defines the action to be taken by the product in case the SoftPLC not running condition is detected, and it
may generate alarm A708, fault F709 or neither of the previous actions, remaining inactive.
Indication
Description
0 = Disable
There is no actuation.
1 = Alarm A708
It acts as an alarm. It is only indicated.
2 = Fault F708
It acts as a fault. It disables the motor.
C11.3 Parameters
They consist of use parameters defined by the user via WPS software. The user can also configure these
parameters.
C11.3 Parameters
C11.3.2 Mode
Adjustable Range:
0 ... 3
Factory Setting:
0
Properties:
Stopped
Description:
This parameter defines the logic execution mode for unclogging the pump driven by the SSW900.
Indication
Description
0 = OFF
It defines that the pump unclogging will not be executed, that is, it is disabled.
1 = Execute with Command
to Start the Pump
It defines that the pump unclogging will be enabled and executed whenever there is a command to
start the pump. This command can come from the HMI, a digital input, communication networks, etc.
2 = Execute with Command
via Digital Input DI3
It defines that the pump unclogging will be enabled and executed whenever the digital input DI3
receives a command, that is, it changes from logic state "0" to logic state "1".
3 = Execute when Pump
Clogging is Detected
It defines that the pump unclogging will be enabled and executed whenever pump clogging is detected
via high motor current.

SSW900 | 7
Parameter Description
NOTE!
To perform the pump unclogging, it is necessary that the SoftPLC function control the motor drive
and direction of rotation to make the pump run in the reverse pumping direction. Therefore, it was
defined that the pump unclogging will only work with the SSW900 operating in REMOTE mode and
with the SoftPLC as command source.
The pump will be driven by digital inputs, controlled by the SoftPLC, with the possibility of 2 or 3-
wire activation.
When starting the application, parameters C3.1, C3.3, C7.1.1, C5.7.1, C5.7.3, C7.3.1 and C7.3.2
will automatically change. Do not change the content of those parameters; otherwise, the
application will stop working.
C11.3 Parameters
C11.3.3 Number of Cycles
Adjustable Range:
1 ... 5
Factory Setting:
3 x
Properties:
Stopped
Description:
This parameter defines the number of times (cycles) that the pump will run in the reverse pumping direction to
unclog the pump driven by the SSW900.
C11.3 Parameters
C11.3.4 Reverse Torque Level
Adjustable Range:
20 ... 100
Factory Setting:
30 %
Properties:
Stopped
Description:
Motor torque level in the reverse direction.
C11.3 Parameters
C11.3.5 Reverse Torque Time
Adjustable Range:
2 ... 60
Factory Setting:
10 s
Properties:
Stopped
Description:
Time of the pump running in the reverse direction.
C11.3 Parameters
C11.3.6 Direct Current Limit
Adjustable Range:
150 ... 500
Factory Setting:
150 %
Properties:
Stopped
Description:
Current limit level of the pump running forward.
C11.3 Parameters
C11.3.7 Direct Current Time
Adjustable Range:
2 ... 60
Factory Setting:
10 s
Properties:
Stopped

SSW900 | 8
Parameter Description
Description:
Time of the pump running forward.
C11.3 Parameters
C11.3.8 Pump Stopped Time
Adjustable Range:
2 ... 60
Factory Setting:
3 s
Properties:
Stopped
Description:
Time with the pump stopped in the cycle to unclog the pump.
C11.3 Parameters
C11.3.9 Overcurrent Detection
Adjustable Range:
0 ... 99
Factory Setting:
30 %
Properties:
Stopped
Description:
Motor overcurrent level to detect pump clogging. It means the percentage above which the function must be
activated. E.g.: 10% = motor rated current + 10%.
C11.3 Parameters
C11.3.10 Time for Detecting Overcurrent
Adjustable Range:
0 ... 999
Factory Setting:
60 s
Properties:
Stopped
Description:
Time to detect pump clogging via motor overcurrent. This parameter defines the time the pump must remain in
the motor high current condition to determine that the pump is in a clogging process, thus generating the alarm
message “A750: Clogging Detected”.
C11.3 Parameters
C11.3.11 Number for Fault
Adjustable Range:
0 ... 100
Factory Setting:
5
Properties:
Stopped
Description:
Number of consecutive clogging events to generate fault F751: Excessive Clogging Events Detected
NOTE!
Setting it to “0” disables the excessive clogging events detected fault. Every time the Pump
Cleaning is disabled, or the pump is turned off, the clogging event counter is reset.
C11.3 Parameters
C11.3.12 Run/Stop DI Mode
Adjustable Range:
0 ... 1
Factory Setting:
0
Properties:
Stopped
Description:
It configures whether the Run/Stop command via DI is a 2-wires or 3-wire command.

SSW900 | 9
Parameter Description
Indication
Description
0 = 2-wire Run/Stops (2-wire) DI1.
1 = 3-wire
1 = Start (3-wire) DI1 and Stop (3-wire) DI2 ..
NOTE!
The setting user parameters are always retentive.
C11 SoftPLC
C11.4. SoftPLC Application
Adjustable Range:
0 ... 2
Factory Setting:
0
Properties:
Stopped
Description:
It allows the user to select which application to run.
Indication
Description
0 = User
It defines that the application downloaded by the user through the WPS is the one that will
run on the SoftPLC.
1 = Timer Control
It defines that the Timer Control is the application that will run on the SoftPLC.
2 = Pump Cleaning
It defines that the Pump Cleaning is the application that will run on the SoftPLC.

SSW900 | 10
Operation
6OPERATION
6.1. UNCLOGGING WITH COMMAND TO START THE PUMP (C11.3.2 = 1)
Setting the execution mode of the pump unclogging (C11.3.2) to 1 defines that the pump unclogging will be
enabled and executed whenever there is a command to start the pump via DI.
Figure 6.1 - Pump unclogging execution with command to start the pump
1 – The Run/Stop command via digital input DI1 starts the motor and enables the operation of the Pump
Cleaning. At this moment, the counting of the first unclogging cycle begins;
2 – The time with the pump stopped (C11.3.8) elapses and the command to start the pump in the reverse
pumping direction with torque level in the reverse direction (C11.3.4) is triggered. At this moment, the counting
of the time with the pump running in the reverse direction (C11.3.5) starts;
3 – The pump accelerates to the speed imposed by the level of reverse torque (C11.3.4);
4 – The time with the pump running in the reverse direction (C11.3.5) elapses and the command to switch off
the pump is triggered. At this moment, the counting of the time with the pump stopped (C11.3.8) starts;
5 – The time with the pump stopped (C11.3.8) elapses, and it is checked whether the number of cycles
(C11.3.3) is greater than 1x. If so, the command to start the pump in the pumping direction with current limit
(C11.3.6) is triggered, thus starting the 2nd cycle. At this moment, the counting of the time with the pump
running in the forward direction (C11.3.5) starts;
6 – The pump accelerates to the speed imposed by the current limit (C11.3.6);
7 – The time with the pump running in the forward direction (C11.3.7) elapses and the command to switch off
the pump is triggered. At this moment, the counting of the time with the pump stopped (C11.3.8) starts;
8 – The time with the pump stopped (C11.3.8) elapses and the command to start the pump in the reverse
pumping direction with torque level in the reverse direction (C11.3.4) is triggered. At this moment, the counting
of the time with the pump running in the reverse direction (C11.3.5) starts;
9 – The pump accelerates to the speed imposed by the level of reverse torque (C11.3.4);
10 – The time with the pump running in the reverse direction (C11.3.5) elapses and the command to switch off
the pump is triggered. At this moment, the counting of the time with the pump stopped (C11.3.8) starts;

SSW900 | 11
Operation
11 – The time with the pump stopped (C11.3.8) elapses, and it is checked whether the number of cycles
(C11.3.3) has reached the end, or if one more cycle should be repeated. If it has reached the end, the
command to start the pump normally is triggered. Otherwise, steps 6 to 11 are repeated.
6.2. UNCLOGGING WITH COMMAND VIA DIGITAL INPUT DI3 (C11.3.2 = 2)
Setting the execution mode of the pump unclogging (P1052) to 2 defines that the pump unclogging will be
enabled and executed whenever digital input DI3 receives a command, that is, it changes from logic state "0" to
logic state "1".
Figure 6.2– Pump unclogging operation with command via digital input DI3
1 – The pump is being driven by the SSW900. At a given moment, digital input DI3 sends a command to
execute the pump unclogging, that is, digital input DI3 goes from logic state "0" to logic state "1". Then, the
command to stop the pump is executed so that the process to unclog the pump starts. The DI3 command to
unclog the pump must be pulsed;
2 – The pump is decelerated following the deceleration ramp defined in parameter C1.13 until it stops. At this
moment, the counting of the first cycle for pump unclogging and the counting of the time with the pump
stopped (C11.3.8) begins;
3 – The time with the pump stopped (C11.3.8) elapses and the command is triggered to start the pump in the
reverse pumping direction with torque level in the reverse direction (C11.3.4). At this moment, the counting of
the time with the pump running in the reverse direction (C11.3.5) starts;
4 – The pump accelerates to the speed imposed by the level of reverse torque (C11.3.4);
5 – The time with the pump running in the reverse direction (C11.3.5) elapses and the command to switch off
the pump is triggered. At this moment, the counting of the time with the pump stopped (C11.3.8) starts;
6 – The time with the pump stopped (C11.3.8) elapses, and it is checked whether the number of cycles
(C11.3.3) is greater than 1x. If so, the command to start the pump in the pumping direction with current limit
(C11.3.6) is triggered, thus starting the 2nd cycle. At this moment, the counting of the time with the pump
running in the forward direction (C11.3.5) starts;
7 – The pump accelerates to the speed imposed by the current limit (C11.3.6);
8 – The time with the pump running in the forward direction (C11.3.7) elapses and the command to switch off
the pump is triggered. At this moment, the counting of the time with the pump stopped (C11.3.8) starts;

SSW900 | 12
Operation
9 – The time with the pump stopped (C11.3.8) elapses and the command to start the pump in the reverse
pumping direction with torque level in the reverse direction (C11.3.4) is triggered. At this moment, the counting
of the time with the pump running in the reverse direction (C11.3.5) starts;
10 – The pump accelerates to the speed imposed by the level of reverse torque (C11.3.4);
11 – The time with the pump running in the reverse direction (C11.3.5) elapses and the command to switch off
the pump is triggered. At this moment, the counting of the time with the pump stopped (C11.3.8) starts;
12 – The time with the pump stopped (C11.3.8) elapses, and it is checked whether the number of cycles
(C11.3.3) has reached the end, or if one more cycle should be repeated. If it has reached the end, the
command to start the pump normally is triggered. Otherwise, steps 6 to 11 are repeated.
6.3. UNCLOGGING WHEN DETECTING PUMP CLOGGING (C11.3.2 = 3)
Setting the execution mode of the pump unclogging (C11.3.2) to 3 defines that the pump unclogging will be
enabled and executed when pump clogging is detected.
Figure 6.3 - Pump unclogging operation when pump clogging is detected
1 – The pump is being driven by the SSW900. At any moment, the motor current exceeds the motor
overcurrent value set to detect the pump clogging (C11.3.9), and the time to detect the pump clogging
(C11.3.10) begins to count;
2 – The motor current remains above the overcurrent value set to detect the pump clogging (C11.3.9), and the
time to detect the pump clogging (C11.3.10) elapsed. At this moment, the command to stop the pump, start
the pump unclogging and indicate alarm A750 (Clog Detected) is triggered;
3 – The pump is decelerated following the deceleration ramp defined in parameter C1.13 until it stops. At this
moment, the counting of the first cycle for pump unclogging and the counting of the time with the pump
stopped (C11.3.8) begins;
4 – The time with the pump stopped (C11.3.8) elapses and the command to start the pump in the reverse
pumping direction with torque level in the reverse direction (C11.3.4) is triggered. At this moment, the counting
of the time with the pump running in the reverse direction (C11.3.5) starts;
5 – The pump accelerates to the speed imposed by the level of reverse torque (C11.3.4);
6 – The time with the pump running in the reverse direction (C11.3.5) elapses and the command to switch off
the pump is triggered. At this moment, the counting of the time with the pump stopped (C11.3.8) starts;

SSW900 | 13
Operation
7 – The time with the pump stopped (C11.3.8) elapses, and it is checked whether the number of cycles
(C11.3.3) is greater than 1x. If so, the command to start the pump in the pumping direction with current limit
(C11.3.6) is triggered, thus starting the 2nd cycle. At this moment, the counting of the time with the pump
running in the forward direction (C11.3.5) starts;
8 – The pump accelerates to the speed imposed by the current limit (C11.3.6);
9 – The time with the pump running in the forward direction (C11.3.7) elapses and the command to switch off
the pump is triggered. At this moment, the counting of the time with the pump stopped (C11.3.8) starts;
10 – The time with the pump stopped (C11.3.8) elapses and the command to start the pump in the reverse
pumping direction with torque level in the reverse direction (C11.3.4) is triggered. At this moment, the counting
of the time with the pump running in the reverse direction (C11.3.5) starts;
11 – The pump accelerates to the speed imposed by the level of reverse torque (C11.3.4);
12 – The time with the pump running in the reverse direction (C11.3.5) elapses and the command to switch off
the pump is triggered. At this moment, the counting of the time with the pump stopped (C11.3.8) starts;
13 – The time with the pump stopped (C11.3.8) elapses, and it is checked whether the number of cycles
(C11.3.3) has reached the end, or if one more cycle should be repeated. If it has reached the end, the
command to start the pump normally is triggered. Otherwise, steps 6 to 11 are repeated.

SSW900 | 14
Troubleshooting
7TROUBLESHOOTING
7.1. FREQUENT PROBLEMS
Table 7:1 Frequent problems
Problem
Probable
Cause
Cause Description
Application will
not run
S6.1.1 ≠ 4 Observed in S6.1 SoftPLC Status/Current ≠ 4 (Application Running).
C11.1 SoftPLC/Mode - set to: 0 = Stop Application.
Or check S6.1 to see the other reasons.
Motor will not
start
Setting error C11.3.2 SoftPLC/Parameters/Mode - set to: 0 = Will Not Execute.
Digital Inputs Check the digital inputs
C11.3.12 = 0 (2-wire Run/Stop)
C11.3.12 = 1 (3-wire Run/Stop)
LOC/REM
command source
Check if the active command source is in Local or Remote. Indication in S3.1.2.
Refer to the Chapter Local/Remote Configuration of the Programming Manual.
The suggestion is to set:
C3 - LOC/REM Selection
C3.1 = 8 (Mode = SoftPLC REM)
C3.3 = 3 (REM command = SoftPLC)
C4 - I/O
C4.2.3 = 14 (DO3 = Circuit Breaker Trip)
C11.3.2 = 1, 2 or 3 (Mode)
C11.3.12 = 0 (Run/Stop 2-wire), 1 (Run/Stop 3 wires)
Check via HMI if it is in “Rem”.