LESA Messtechnik PS.2LCD User manual

www.lesa.de
LESA Messtechnik
Hegholt 59
22179 Hamburg
Germany
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Operating Manual

Table of contents
1 Warning and safety information
2 General product description, properties and optional functions
3 Configuration, control elements and function display
4 Configuration menu, images and notes on configuring the parameters
5 Error reports in the display, potential errors, assistance
6 Test mode without pumps
7 Technical data
9 Norms
9 Annex: Terminal block wiring diagrams
Last update: 05/01/2015
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1.0 Warning and safety information for the installation and commissioning of the device
1.1 Applications
This switchgear has been designed for domestic and communal sewage, wastewater and rainwater pump
stations.
Please note the following as regards pumps implemented in an explosive area: The switchgear itself must be
installed outside of the explosive area.
When using external 4 - 20 mA level sensors and float switches installed in the explosive area, it will be
necessary to use components with the requisite approvals.
1.2 Personnel qualifications
Personnel entrusted with the installation, commissioning and maintenance of the switchgear must hold the
requisite qualifications.
1.3 Safety instructions for the operator
Observe the existing regulations governing accident prevention, VDE specifications and stipulations set forth
by the energy supply company. When opening the device (removing cover or terminal cover) or working on the
pumps, the control system absolutely must be rendered current-free via the pre-fuse or a separate circuit
breaker.
1.4 Dangers of non-compliance with safety information
Non-compliance with the safety information can lead to endangerment for persons and product/system. Non-
compliance with the safety information can lead to loss of all rights to damage compensation.
1.6 Independent modification and replacement part supply
Changes to the product are only permissible in coordination with the manufacturer. In the interest of safety,
use original replacement parts and accessories authorised by the manufacturer. Using other parts can void
liability for the resulting consequences.
1.7 Impermissible use
The operational safety of the product supplied is only guaranteed for proper use as laid out in Section 1.1.
The threshold values specified on the data sheet must be met in all cases.
1.8 Transport and storage
Store and transport the switchgear such that damage it won't be exposed to shock, impact and temperatures
outside the range of -20°C to +60°C.
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PS2 – SYSTEM ver.1.19

2.0 General product description, properties and optional functions
2.1 Product description
The PS2 system consists of one operator device implemented in the control cabinet door, and one guide
device for snapping onto the DIN rail. The PS2 system makes it possible for the control cabinet manufacturer
to create a control unit in line with the user's wishes in an affordable manner.
Upon request, the PS2 system's inputs can be configured differently. However, the inputs are configured ex-
works, and cannot be modified afterwards. The fill level is optionally determined via dynamic pressure, bubbler
system, external sensor (4 - 20 mA) or float switch. There are two relay contacts available for triggering the
contactor combinations and four relay contacts available for issuing error reports. Control and configuration
are extremely easy. Switch points, times and various functions are configured using a digital potentiometer. All
values can be queried on the LC display. The eight LEDs indicate operational status and error reports. There
are further keys available for the Manual - 0 - Auto functions.
2.2 Properties
- LCD plain text display - Thermal monitoring of the pumps
- Manual - 0 - Auto functions - Pump switch off via turn off point and overrun
- Cancel button - Runtime monitoring
- Forced pump switch on - Variable staggered start (delayed switch on)
- Internal acoustic alarm - Collective fault message, zero potential
- High water alarm - Memory, no. of pump starts
- Operating hours counter - Input for high water float switch
- Pump change - Forced switchover
- High interference immunity - Easy to operate
- Atex mode - Service mode
- Peak load can be shut off - Interpump delay configurable
- Level detection optionally via internal pressure converter, external 4 – 20 mA probe
- Measurement range of external probe configurable in menu
- Error report inputs for various monitoring modules
- Connection to control system via digital and analogue inputs and outputs
- All configurations and various error reports will be stored, regardless of power interruptions
NEW! - Analogue outputs 0 - 10V and 4 - 20 mA
- Last error memory
- Runtime monitoring
2.3 Optional functions and/or components
(only supplied if specifically indicated in the order)
- DIN rail module for connection of external switches (e.g.: toggle switch)
- External locking or dry run protection instead of seal monitoring
- Additional pressure sensor for redundant high water alarm, with the pumps connected in
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PS2 – SYSTEM ver.1.19

3.0 Configuration, control elements and function displays
3.1 All values and settings can be queried using the digital potentiometer display. If a until is going to be changed,
adjust the control unit until the corresponding setting appears on the display. Now press the select / cancel
button. The value last saved will start to blink. The digital potentiometer display can now be used to change
the setting. Quick turns will change the values more rapidly, while slow turns make it possible to make more
precise changes. Once the desired value has been reached, use the select / cancel button to confirm. The
value will stop blinking and be stored. Check all values prior to commissioning.
The display will automatically return to the default setting after 20 seconds.
CAUTION! Operating hours and pump starts are counted continuously,
it is not possible to adjust or reset them.
3.2 Control elements
- Display Pressing the digital potentiometer will query all settings, and moving the display knob will
query all error reports, operating hours, number of pump starts and motor current.
Moreover, settings are made using the digital potentiometer. If the knob is not moved for more
than 20 seconds, then the display will jump back to the default setting. (see above,
Configuration chapter)
- Selection/cancel
Button Pressing this button will confirm the errors over-current, P1 - P2 without load and will confirm
thermal error 2 after remediating the cause. Should an error continue, then only the common
error report relay and the piezo buzzer will be shut off. This also applies for thermal error 1
and the high water alarm. Settings can still be changed using the button. (see above,
Configuration chapter)
There is one each per pump of each of the following keys and LEDs.
- HAND Pressing this button will place the pump into
manual operation. The green LED will blink. If
the pump is being run via the manual function,
then it will automatically shut off after 2 minutes.
- 0 The pump is off.
The green LED is off.
- AUTO The pump is switched based on level.
The green LED stays on.
CAUTION! If power is interrupted during manual mode, then the control system will return to automatic
mode. The operation modes "auto" and "0" remain stored, regardless of power interruptions.
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PS2 – SYSTEM ver.1.19

3.3 Function display via light-emitting diodes
LED – red = High water alarm, error P1 or P2
LED - solid yellow = Pump is in operation
LED - blinking yellow = Pump is running via the overrun
function
LED - solid green = Automatic mode
LED - blinking green = Manual mode
LED - irregular green blinking = Manual mode shut off after 2 min.
3.4 Display
Automatic switching off of the background lighting:
If no further settings are actuated on the device, the background lighting switches off automatically after 2
minutes. As soon as the rotary switch or one of the push-buttons is activated, the background lighting switches
back on again.
The top line always shows the level. The bottom line shows the operating hours when the pumps are not
triggered. If any errors arise, then they will be displayed alternatingly on the display's bottom line:
P1 :Therm. fault 1 (Terminal 01 / 02 bi-metal contact opened)
P1 :Therm. fault 2 (Terminal 02 / 03 bi-metal contact opened)
P2 :Therm. fault 1 (Terminal 06 / 07 bi-metal contact opened)
P2 :Therm. fault 2 (Terminal 07 / 08 bi-metal contact opened)
P1: or P2: Over-current (the respective motor circuit breaker has triggered)
Depending on how the PS2 SYSTEM's inputs are configured, further error reports, e.g. high water
float, residual current circuit breaker, DI error or rotary field error will appear (connection assignment
is laid out in the wiring diagram).
High water alarm the level has transgressed the high water setting
Switch-on point under- the settings for the pump turning on and off
switch-off point overlap
High water under- the setting for the high water alarm is under the
switch-on point switch-on point
Switch points after the measuring range for the 4 - 20 mA probe has been changed
check at least one switch point is outside the measuring range.
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PS2 – SYSTEM ver.1.19

The following table shows the configuration possibilities. The display's top line shows the
option, the bottom line is the value that can be changed.
1. L
ine in display
Configuration
option
Explanation
Basic load ON 0 – 200 (500) cm This value establishes the switch-on point for the first pump
Basic load OFF 0 – 200 (500) cm This value establishes the switch-off point for the first pump
Peak load ON 0 – 200 (500) cm This value establishes the switch-on point for the second
pump
Peak load OFF 0 – 200 (500) cm This value establishes the switch-off point for the second
pump
High water 0 – 200 (500) cm When the configured value is transgressed, the common fault
report relay and the high water relay will switch
Running time max 0 – 60 sec. The value 0 deactivates this function. If the value is set between 1-60
min. the pump shuts off if the set operating time has been exceeded
without interruption
Run time altern. Is deactivated
1 – 60 min
When the configured time is transgressed in basic load mode,
there will be a pump change.
Start delay 0 – 900 sec. After loss of power, the pumps won't start until after the
configured time has passed. The display shows the remaining
time.
Stop delay 0 – 180 sec. The basic load pump will continue to run after transgressing
the shut off point until the configured time has ended.
Interpump Delay 0 – 60 sec. When both pumps are triggered, then the 2nd pump won't turn
on until after the configured time has passed.
Force activation Is deactivated,
1 – 10s
Is activated = When the pumps are not triggered for 24 hours,
then they will automatically run for the configured
Acoustic alarm Is deactivated,
is activated
Is activated = when there is an error, the internal piezo buzzer
will sound
Intermitt. alarm Is deactivated,
is activated
Is activated = The error report relay is clocked.
Instead of a blinking light, a more economical solid light can
be used.
Pump alternation Is deactivated,
is activated
Is activated = After each use of the basic load pump, there will
be a change to the other pump.
P1: therm fault 1 Is deactivated,
is activated
Is shut off = On block 31, 32 (pump 1), no bimetal contact
(warning contact) is connected.
P2: therm fault 1 Is deactivated,
is activated
Is shut off = On block 38, 39 (pump 2), no bimetal contact
(warning contact) is connected.
ATEX mode Is deactivated,
is activated
Is activated = If no liquid is configured via level detection, then
the pumps cannot be started. This applies for the manual
function, as well as for 24-h switch on and remote control
systems.
Service mode is activated,
Is deactivated
Is activated = All settings can be modified
Is shut off = Settings can be displayed, but cannot be modified
Level control Internal converter
(optional)
Float switch
4 – 20 mA Interface
Level detection via dynamic pressure or bubbler system
Level detection via float switch
Level detection via external sensor (4 - 20 mA)
20mA => Level 0 – 1000 cm Display modification to the connected probe
Language German - English - French
- Italian - Spanish - Dutch -
Polish - Czech
The country language can be changed on the display.
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PS2 – SYSTEM ver.1.19

4.2 Supplements to the individual items in the configuration menu
Configuring the switch points
Lock peak load mode
In order to use the popes exclusively in alternating mode, the switch-on point for peak load mode must be set
to zero. The display will show the message "Peak load on is shut off".
Lowest level configurations (on/off)
If a switch-on point is selected lower than 5 cm, then the software will automatically use 5 cm as the switch-on
point. If a switch-off point is selected lower than 3 cm, then the software will automatically use 3 cm as the
switch-off point. This also applies for starting overrun time, which will then start at 3 cm. This is necessary for
safe operation of the switchgear system.
Runtime change
A maximum runtime can be configured for the basic load pump. After that time has passed, there will be a
change to the other pump. This requires that both pumps be in automatic mode. After three changes without
interruption, the alarm is additionally triggered and the display will show the "runtime alarm" report.
NEW! Runtime monitoring
The menu can be used to access the item running time max. The default setting is for this value to be zero, i.e.
the function is deactivated. If a value of 1 - 60 minutes is set, then the pump will shut off after running longer
than the configured value without interruption. Moreover, an alarm will be triggered and a corresponding error
report will be shown on the display. The pump will not run again until the error has been confirmed. Runtime
monitoring applies to automatic and manual modes.
Runtime change + runtime monitoring
It makes sense to activate only one of the two functions. If a time is configured in the two functions, then only
the function with the lower time setting will be executed.
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PS2 – SYSTEM ver.1.19

Delay (Stop delay)
The delay configured will only be active after a loss in power (staggered start in projects). For each further
start, the pumps will immediately turn on when triggered via level.
Overrun (Start delay)
Overrun facilitates draining below the level probe, e.g. for dynamic pressure systems.
Th. fault 1, Th. fault 2 (both available once for each pump on the menu)
For pumps whose temperature monitoring consists of only one bimetal contact per pump, thermal error 1 can
be deactivated accordingly in the menu. Thermal error 2 cannot be turned off in the menu.
Interpump Delay
When both pumps are triggered, then the 2nd pump won't turn on until after the configured time has passed.
NEW! Error memory (last 4 errors)
The last error to appear will remain stored regardless of power interruptions and can be called up in the menu
under "last error". When the error is called up in the menu, it can be deleted from memory using the cancel
key.
Atex mode
Atex mode has to be activated for pumps implemented in ex-zones. Atex mode impedes the pumps from
being turned on via manual function, via forced switch-on or via remote control system until the switch-off point
is met. If pumps are started via overrun time or manual function while the switch-off point is not met, then
draining can take place under the switch-off point. The manual function will be automatically interrupted after 2
minutes. When the Atex function hinders pumps from turning on, the display will show the report "ATEX: Level
under switch-off point."
Service mode
The default setting is for service mode to be activated, i.e. all setting can be changed. When service mode is
turned off in the menu, the settings can only be queried using the digital potentiometer.
CAUTION! When service mode is deactivated, no settings can be changed other than country language.
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PS2 – SYSTEM ver.1.19

Level control
It can be selected whether the control system will run over the internal level sensor (dynamic pressure,
bubbler system), an external 4 - 20 mA level probe or float switch.
CAUTION! The input for the high water alarm (terminal 23 / 24) is always active and can be implemented
as redundant monitoring. As soon as terminal 23 / 24 are connected, the high water alarm is triggered and the
pumps are switched with a delay.
When using external 4 - 20 mA level sensors and float switches installed in an explosive area, it will be
necessary to use components with the requisite approvals.
20 mA => Level
This setting adjusts the switch points and level display to a connected external
4 - 20 mA level probe. The processor converts the input signal such that the correct level is displayed.
When the measurement range for the 4 - 20 mA probe is changed in the configuration menu, the switch points
will have to be re-configured, as they will have changed based on system reasons. Thus, the correct order will
always be to first configure the probe's measurement range and then the switch points.
For use in an ex-zone, the corresponding requirements must be complied with, i.e. the 4 - 20 mA probe being
used must have the corresponding approval and a fitting ex-barrier. If the switch points are outside the level
probe's configured range, then the report will be shown
"Check switch points".
Country language
The default settings are German / English / French / Italian / Spanish / Dutch / Polish / Czech. The country
language can also be changed when service mode is deactivated.
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PS2 – SYSTEM ver.1.19