Siemens SINAMICS V20 Inverter User manual

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SINAMICS
SINAMICS V20 multi-pump control
Operating Manual
05/2018
A5E43416874
-002
Overview
1
Pump switch-in/switch-out
2
Stop mode
3
Pump switchover
4
Service mode
5
Faults and alarms
6

Siemens AG
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E43416874-002
Ⓟ
05/2018 Subject to change
Copyright © Siemens AG 2017.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by
personnel qualified
for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

SINAMICS V20 multi-pump control
Operating Manual, 05/2018, A5E43416874-002 3
Table of contents
1 Overview................................................................................................................................................. 5
2 Pump switch-in/switch-out....................................................................................................................... 9
3 Stop mode ............................................................................................................................................ 19
4 Pump switchover................................................................................................................................... 21
5 Service mode........................................................................................................................................ 25
6 Faults and alarms ................................................................................................................................. 27

Table of contents
SINAMICS V20 multi-pump control
4Operating Manual, 05/2018, A5E43416874-002

SINAMICS V20 multi-pump control
Operating Manual, 05/2018, A5E43416874-002 5
Overview
1
Multi-pump control is suitable for applications that require simultaneous operation of up to
four pumps, for example, equalizing significantly fluctuating water pressures or flow rates.
After the multi-pump control is enabled, you can configure the following four sub-functions
based on your particular requirements: switching-in/out, stop mode, pump switchover, and
service mode.
Note
To control more than two pumps simultaneously, you must connect an optional I/O Extension
Module to expand the number of V20
I/O terminals. For more information about this option
module, see Section "I/O Extension Module" in "SINAMICS V20 Inverter Operating
Instructions".
Enabling the function
To enable this function, you must first make sure that the firmware version of the V20
inverter is 3.94 or later. Then, use the optional Parameter Loader and an SD card to
download the multi-pump control script files into the inverter. For more information about the
Parameter Loader and the SD card, see Section "Parameter Loader" in "SINAMICS V20
Inverter Operating Instructions".
Proceed through the following steps to download the script files into the inverter:
1. Download the script files "autorun.lua", "utils.lua", and "SSTAGE.bin" via the Internet
address (https://support.industry.siemens.com/cs/us/en/ps/13208).
2. Place "SSTAGE.bin" in the root directory of the SD card.
3. Create a folder named "romfs" under the root directory of the SD card and place
"autorun.lua" and "utils.lua" in the folder.
4. Fit the Parameter Loader to the inverter, and then insert the SD card into the Parameter
Loader.
5. Power on the inverter, and data transfer starts automatically. The inverter displays
"Updating" during the transfer.
6. After a successful transfer, the inverter displays "Update complete". If any fault or alarm
occurs during the transfer, see Section "Faults and alarms (Page 27)" or Section "Faults
and alarms" in "SINAMICS V20 Inverter Operating Instructions" for possible reasons and
remedies.
7. Remove the Parameter Loader and re-power on the inverter. Then the multi-pump control
function is automatically enabled.

Overview
SINAMICS V20 multi-pump control
6Operating Manual, 05/2018, A5E43416874-002
Note
•
Make sure that the function-specific script files you use is downloaded from the previous
Internet address. Otherwise, alarm A650 may appear reminding you that this script is not
an officially released script. Also, you can download the "SINAMICS V20 Inverter
Operating Instructions" from the link.
•
You can obtain the "SSTAGE.bin" file from the corresponding firmware updating package.
Make sure that the version of the firmware updating package to be downloaded and the
version of your V20 firmware are the same.
•
After you successfully download the script files into the inverter, all parameters used for
this function are automatically set to their default settings. Note that the default settings of
parameters P0731, P0732, P0733, P0734, P0840, P0845, P1200, and P2200, which are
different from their factory defaults, are changed to adapt to the function. To make sure
that the multi-pump control function runs properly, do not manually set the values of
P0840 and P0845 after the function is enabled.
•
Multi-pump control uses PID controller-specific parameters. For more information about
how to configure those parameters, see Section "Setting the PID controller" in
"SINAMICS V20 Inverter Operating Instructions".
•
If you use the motor staging function on the inverter, this function is automatically
disabled after the multi-pump control function is enabled.
Setting parameters
Parameter
Function
Setting
P4002 Control of script interpreter This parameter controls the execution of the script.
0: Stop script
1: Start script
Range: 0 to 1 (default setting: 1)
r4003 Status of script interpreter Displays the status of the script interpreter.
0: Interpreter ready
1: Script loading
2: Script loading failed
3: Script executing
4: Script execution error
5: Script execution complete
Range: 0 to 5 (default setting: 0)
P4004 Script start control Controls when the script is executed.
0: The script will be executed only when the value of P4002 is changed from 0
to 1.
1: The script will be executed automatically after power-on if P4002 = 1.
Range: 0 to 1 (default setting: 1)
P4030 Multi-pump control script
parameter default
Controls the reset operation of the script parameters. The value change to this
parameter takes effect after the next time the script is started.
0: Set values of all script parameters to default settings after the script is started.
1: Do not reset.
Range: 0 to 1 (default setting: 1)

Overview
SINAMICS V20 multi-pump control
Operating Manual, 05/2018, A5E43416874-002 7
Note
You can only use digital input 1 as the ON/OFF control source, related to r
4000.0.
Note
To enable the multi
-pump control function automatically after each inverter power-on, make
sure that you do not change the default setting of P4002 and P4004, that is, "1".

Overview
SINAMICS V20 multi-pump control
8Operating Manual, 05/2018, A5E43416874-002

SINAMICS V20 multi-pump control
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Pump switch-in/switch-out
2
The inverter uses four relays (KP1 to KP4), which are connected to digital outputs DO1 to
DO4, to switch pumps in and out according to the PID error (r2273). In addition, two groups
of contactors, KDs and KMs, are used to switch the pumps between inverter operation and
line system operation. Soft pump switching can be realized as all motors start/stop with ramp
speeds, so as to minimize the shock to the pipes.
Main circuit
Note
The maximum voltage on DO1 is ± 35
V DC. The maximum load current on DO1 is 100 mA.

Pump switch-in/switch-out
SINAMICS V20 multi-pump control
10 Operating Manual, 05/2018, A5E43416874-002
External control circuit
Pump switch-in
If the pump controlled by the inverter runs at the maximum speed (P1082) and the PID error
is higher than the switch-in threshold (P2373) and lower than the delay override threshold
(P2376) for a specified time (P2374), the inverter first switches the pump from inverter
operation to line system operation, and then switches on an idle pump which is softly started
with a ramp-up speed and runs in inverter operation.
Note
If the PID error rises above the switch
-in delay override threshold (P2376), the inverter skips
the switch
-in delay (P2374) and performs the switch-in operation immediately.
Parameter P4012 is used to control the selection mode of the next pump that is softly started
by the inverter. Bits 01 to 04 of r4000 control the pump which is selected to run depending
on P4012.
●P4012 = 0: Selecting the next pump according to the fixed sequence. The inverter
switches in the pump by following the sequence M1, M2, M3, to M4.
●P4012 = 1: Selecting the next pump according to the operating hours. The inverter
switches in the pump with the least absolute operating hours (r4026 to r4029).