System data

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WLP-1 / WLP-2

Terminals

Meter inputs:
Terminal for four flow meters with impulse generators; alternatively two flow meters with separate forward/return impulse generators.

Analog inputs:
8 pcs. 4-20 mA inputs with voltage source for attachment of liquid sensors type LS-X, temperature- or pressure transmitters.
Selectable configuration.

Digital inputs:
Input for ext. alarm acknowledge (reset key)
Input for ext. valve cutoff
Input for monitor suppression.

Digital outputs:
Meter impulse repetition (scalable)
Indicator for monitor suppression
Energy impulse (1 kWh) (WLP-2/Opt. E)
Indicator for tightness check in progress

Alarm relays:
Man-on-the-spot
Leakage alarm
Power supply error
System error

Valve outputs
WLP-1:
4 pcs. cutoff valve (Master, 24Vac)
2 pcs. cutoff valve (Slave, 230Vac)
Drain valve (sequence controlled, 24Vac)

WLP-2/BCW:
Cutoff valves forward/return (Master, 24Vac)
Cutoff valves forward/return (Slave, 230Vac)
Drain valve (Interlocked, 24Vac)

Communication:
RS-232C port for attachment of modem or protocol converter
Port for networking several WLP controllers

Operation

Menu - languages:
The system menu is presented in plaintext on a 4*40 LCD display in the preferred language: danish, english, or german. Arrow and Enter keys are employed for navigation and selection.
A further four function keys, eight front panel indicators and a buzzer are provided.

Operation (cont.)

Menu - access control:
The menu system may be inspected by anyone. Parameter changes are subject to actual user having the necessary privilege.

Menu - logging
The 500 most recent parameter changes are recorded in a service log with timestamp, user ID, and - where possible - from/to parameter values.

Functions

Leakage monitor
WLP-1:
Continuous leakage monitoring of the installation according to a number of adjustable parameters. Up to seven different monitor mechanism may be simultaneously active.
Five of the seven mechanisms are phase dependent, i.e. for each of these mechanisms two sets of parameters exist for use in high and low consumption phases respectively.
An integral real-time clock and a 4 x 2 stage programmable timer govern phase changes; this arrangement permits continuous monitoring even in installations exhibiting large day/night consumption variation.

WLP-2/BCW:
Intake and outlet flow are continuously measured and compared allowing for differences in volume and meters. Alarm is issued when the difference exceeds a preset limiting value, and the installation is cut off.

Tightness check (WLP-2):
Regular, automatic execution of sequence for checking valve and installation tightness and establishing pipe venting requirement.

Water detection (Opt. V):
Continuous point protection against aggrgate water using liquid sensor type LS-X with adjustable response time, function and alarm response.

Energy calculation (Opt. E):
Using two temperature transmitters the WLP-2/BCW systems calculate power and energy from the measured flow. Units for presentation are freely selectable. The systems generates energy impulses for remote counters or BM/SCADA systems.
WLP connectivity
 A: BM/SCADA connection  D: Alarm via siren  G: Key switch or burglar alarm influence
 B: Remote control via PC  E: Report via existing alarm system  H: Liquid, temp. and pressure sensors
 C: Remote control via modem  F: Alarm via signalling lamp  I: DanTaet Controller Network
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System logger

Event log:
The 500 most recent state changes on control inputs/outputs and control functions are recorded in an event log with timestamp and event identification.

Data log:
Consumption data are automatically recorded in up to eight separate logs, most of which are circular, i.e. oldest values are overwritten when the log wraps around.

Alarm response

Valves:
Cutoff valves are closed on severe alarm types. Following expiration of the valve traverse time, a drain valve is opened (Opt).

Alarm relays:
Man-on-the-spot relay drops on alarms causing valve cutoff, and is reactivated on buzzer mute or alarm acknowledge keypresses. Leakage alarm relay drops on leakage, tightness error or detection of aggregate water in active monitoring point. Power failure relay drops on error in external or internal power supplies. System error relay drops on error in system components.

Modem callout:
The system may be configured to respond to an alarm condition by making a callout via modem to another modem (recommended), or telehone according to settings. On callout to modem (printer, terminal or computer) the time and type of alarm issue and (if entered) cleartext monitoring point identification are delivered. An attached modem will be automatically shared by networked WLP controllers.

Communication

Ports:
Modem/protocol converters
(COM2) - RS-232C
Networking port
(COM1) - RS-485 (typ.)
Localhost
(COM0) - virtual

Unencapsulated datagrams may only be used when attaching directly to a port in the local host. Encapsulated datagrams contain source- and destination addresses, and are routeable on a network. cid-16 encapsulation is used for line-oriented protocols of modest datagram size, while cid-32 is generally applicable for line- or block orientation for datagram sizes up to 2 kB.
New protocols are regularly implemented.

Networking:
The WLP kernel contains a router for cid-16 and cid-32 encapsulated protocols which determines if a received datagram should be:
  1. delivered/copied to localhost
    (destination localhost/broadcast)
  2. delivered/copied to other port
    (destination subnet, gateway/broadcast)
  3. ignored (discarded)

By assigning a unique address to each WLP controller, point-to-point communication can be established between any two hosts on the network.

A modem attached to the WLP contoller will answer incoming calls. Hereby a computer implementing the required protocols and encapsulation may perform remote control and -display of this and all other networked WLP hosts.

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Protocol/encapsulation None cid-16 cid-32 usage
ansiterm x     local terminal attachment
pet16   x   remote power/energy readout
tsync     x net-time synchronization
usta     x net-modem sharing
hlst     x net-host list
echo     x net-connection testing
rpp     x remote programming
pte32     x remote control
pdmp x x x (remote) parameter readout
ldmp x x x (remote) log readout

Download WLP system description in pdf-format

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