Water alarm. Water detection system L-PS-X / LS-X. Højmevej Odense SV Tlf Fax

Transcription

1 Water alarm Water detection system L-PS-X / LS-X Program release Højmevej Odense SV Tlf Fax Doc. no rev

2 Table of contents Table of contents... 1 System description... 3 Components... 3 Option... 3 Indicators and controls... 4 Reset button... 4 Terminals... 5 Supply:... 5 Alarm output:... 5 Sensor attachment:... 5 Function... 6 Sensor location... 6 Applications... 6 Remote Communication via PC... 7 Note!... 7 Configuration abstract... 7 Activation of measuring channel... 7 Logger... 8 Setting the clock... 9 Mark... 9 Baud rate Danish letters Networking Appendix Drawing Liquid Sensor - Space under roof slope. Drawing Liquid Sensor in floor duct. Drawing Liquid Sensor under pipe joint. Drawing Liquid Sensor - Crawl space Release Doc.no rev Page 2

3 System description DanTaet Water alarm L-PS-X System is designed for monitoring sensitive areas for aggregation of water using up to eight liquid sensors type LS-X. L-PS-X features a fail-safe floating alarm output, and a floating auxiliary alarm output. By series connecting their alarm outputs, several L-PS-X may be cascaded to operate on a single CTS-input. The LS-X liquid sensors feature a 2-wire current interface, permitting remote location (up to 3,500 meters) of the sensors from L-PS-X, provided a properly shielded cable of a suitable cross-section is employed. The liquid sensors respond to an aggregation of water large enough to touch both its electrodes, causing the L-PS-X to issue an alarm according to the selected mode. L-PS-X will further issue alarms for system, sensor and cable failures. Each of the eight measuring channels may be configured: Channel On/Off (unused channels must be Off) (ENA) Alarm response time 1 or 1800 seconds (drying time) (DLY) Channel autoreset On/Off (response if aggregate water disappears) (RST) Further, the lower eight bits of the DCB device address may be set on a switch. Components The system comprises a controller type L-PS-X and a number of liquid sensors type LS-X. Option The controller may optionally be equipped with a RS-232 interface for terminals, serial printers or CTS-systems, or a RS-485 interface for the DCB when a master DanTaet WLP controller is involved Release Doc.no rev Page 3

4 Indicators and controls A power lamp indicates all primary and secondary power supplies are OK. The front panel features a Reset button used for muting the acoustic alarm, and to acknowledge alarms and restart the system. Further, each channel features a status lamp indicating: No light: Fixed green light: Fixed yellow light: Fixed red light: Blinking red light: Channel is switched Off Channel sensor is dry. Channel sensor is wet, alarm response time not expired. Channel issued an alarm after response time expiry. Channel issued a water alarm, and the acoustic alarm has been muted. Blinking green light: Cable break or no sensor attached (system error). (Alarm will occur within 10 sec.) Green/red alternate: Sensor- or cable short, relay or sensor voltage failure (System error). (Alarm will occur within 10 sec.) Blinking yellow light: Channel issued a system alarm, and the acoustic alarm has been muted. Reset button The front panel Reset button is used for muting the acoustic alarm and for alarm acknowledgement and system restart. Function: The first key press mutes the acoustic alarm; system remains in alarm state. Second key press will acknowledge alarm and restart system. If the root cause of the alarm persists, the system will eventually re-enter the alarm state Release Doc.no rev Page 4

5 Terminals Stik til interface Kanal 1 Kanal 2 Kanal 3 Kanal 4 Kanal 5 Kanal 6 Kanal 7 Kanal 8 Vex +Vs Vex +Vs Vex +Vs Vex +Vs Vex +Vs Vex +Vs Vex +Vs Vex +Vs 230 Vac GND L N 200mAT 200mAT Supply: Alarm output: 230 Vac Terminal 1 Protective Earth Terminal 2 Live Terminal 3 Neutral 3 sets floating SPDT switch Main alarm Main alarm Aux alarm Output 1 (230V) Output 2 (24V) Output 3 (24V) Terminal 4 NC Terminal 7 NC Terminal 10 NC Terminal 5 C Terminal 8 C Terminal 11 C Terminal 6 NO Terminal 9 NO Terminal 12 NO Sensor attachment: Ch. 1 Terminal 13 Minus (white) Ch. 5 Terminal 21 Minus (white) Terminal 14 Plus (brown) Terminal 22 Plus (brown) Ch. 2 Terminal 15 Minus (white) Ch. 6 Terminal 23 Minus (white) Terminal 16 Plus (brown) Terminal 24 Plus (brown) Ch. 3 Terminal 17 Minus (white) Ch. 7 Terminal 25 Minus (white) Terminal 18 Plus (brown) Terminal 26 Plus (brown) Ch. 4 Terminal 19 Minus (white) Ch. 8 Terminal 27 Minus (white) Terminal 20 Plus (brown) Terminal 28 Plus (brown) Use shielded 2x0.25 mm 2 cable for sensor extension. Be sure the to clamp the shield firmly under one of the mounting plate brackets. Maximum allowable total cable length per sensor is 3,500 meters (11,400 ft) Release Doc.no rev Page 5

6 Function In the normal state, each activated measuring channel is monitored for cable break, cable short and aggregate water conditions. Cable break and short alarms always employ a 10 second response time, whereby during installation channels may be switched on briefly to check the channel status in the indicator without causing an immediate alarm. Aggregate water alarm is issued with the response time selected for the channel, 1 or 1800 seconds, i.e. for practical purposes immediately, or with a half-hour delay. Note that the error condition must be present continuously during the response time interval for the system to issue an alarm. In the normal state, the alarm relay is activated. On alarm, the main alarm outputs are deactivated, while the auxiliary alarm output and the acoustic alarm are activated. The acoustic alarm may be muted by pressing the front panel Reset button; at the same time the auxiliary alarm output will deactivate, and channel lamps indicating an error will switch from fixed to blinking red light (aggregate water), or from blinking red/green to blinking yellow light (cable/sensor error). After muting the acoustic alarm, finding and mending the error and wiping the sensor dry, the system is restarted by pressing the Reset button once again, whereby the main alarm output is activated if all active channels are error-free. If channel Autoreset is selected, aggregate water alarms for that channel will be automatically revoked after the aggregate water has vanished, provided the minimum alarm time of 10 seconds has expired. L-PS-X handles multiple nested alarms in the alarm state. If the acoustic alarm has been muted, it will be turned back on if another channel issues a new alarm. New alarms are indicated by fixed red, or alternating red/green light. If any channel indicator displays this, at least two Reset key presses will be required to reactivate the alarm relay. Sensor location Location of individual liquid sensors should be determined by a risk assessment strategy contemplating where water ingress is likely to occur, and where the risk/effect of leakage is particularly profound. Note that a minimum separation of 1 metre (3 ft) is required between any two liquid sensors likely to be in contact with the same water aggregate. Applications Enclosed in this manual are suggestions and examples for sensor location Drawings , , , Release Doc.no rev Page 6

7 Remote Communication via PC If the L-PS-X control box is ordered with RS-232 interface, and connecting this to the COM port of a PC, system status and alarms may be tracked/monitored with the use of a terminal program (e.g. Hyperterminal on Windows). Manual communication with the control box is also possible using the following commands: Function Command Setting the clock rtc Alarm acknowledge rst System status mark Naming channels loc n Note! When an alarm is acknowledged using the rst command, the system status should be checked using the mark command to inspect if any channel is still in an alarm condition. The rtc, mark and loc commands are described further on in this manual. Configuration abstract Configuration of controller functionality and communication is done using a series of miniature switches located inside the front panel cover of the L-PS-X controller. The switches control the following functions: ENA = Activation/deactivation of individual measuring channels. DLY = Alarm response time for channel. Off = 1 sec / On = 1800 sec. RST = Channel autoreset. On = Alarm is revoked when water disappears. CID = Controller address (lower 8 bits). Used by DCB networking. AUX = Logger setup. Activation of measuring channel For the controller to employ an attached liquid sensor, the channel must be activated on the ENA switch. ENA switch 1-8 (Ch 1-8) Off/On = Channel deactivated/activated Release Doc.no rev Page 7

8 Logger The COM port serving the resident system monitor may also be employed for event logging on an attached computer, serial terminal or serial printer. The AUX switch is used to govern the characteristics of the event logging feature. AUX switch no. 3 Off/On = Logging Off/On Event logging comes in two fundamentally different ways. One way ('Terse') is intended for reception by a computer, such as e.g. a CTS system. The other way ('Verbose') is meant for observation by the human eye, on a terminal screen or printer. Terse logging employs just one message type, with a consistent format: a) Relay status indicator +/a/q = OK/Alarm/Quiet (muted) b) Real time i the format <wdyyyymmdd,hhmmss.ffff> where wd is a two-letter weekday abbreviation. c) Input status indicators w. index i1-i8 -/+/b/w/c/f = Off/OK/break/wet/current/fail d) Monitor status indicators w. index m1-m8 +/a/q = OK/Alarm/Quiet e) CR/LF Verbose logging employs a system text and a user definable text up to 54 characters for description/identification of the measuring point for the channel. Message length thus depends on the length of the user-defined text. Messages are composed thus: a) Real time formatted as: wdy dd-mm-yyyy hh:mm:ss.ffff b) Colon and space c) Event: Alarm/Quiet/Reset d) Channel number (1-8) e) User text for channel f) CR/LF AUX switch no. 4 Off/On = Terse/Verbose message format Release Doc.no rev Page 8

9 User text entry is done from a terminal attached to the unit COM port. Press <Enter> to obtain a prompt > or *, then use the command: loc n This is the user text for channel n to enter the user text for channel n (n=1..8), or loc n to inspect the user text for channel n (n=1..8) Setting the clock Setting the system real-time clock is likewise done from a terminal attached to the controller COM port. At the prompt, issue rtc to inspect the current clock setting, and the command rtc wdy dd-mm-yyyy hh:mm:ss[.ffff] to change it. Note that the weekday specification (wdy) employs the English three-letter abbreviations sun mon tue wed thu fri sat (it is sufficient to enter the first two letters), and that entry of subsecond time specification [.ffff] is optional. Mark For continuous verification of functionality, the controller may be setup to log a mark every 10 minutes. In terse mode, this mark will have the same format as all other terse messages. In verbose mode, the format is: a) Real time formatted wdy dd-mm-yyyy hh:mm:ss.ffff b) Colon and space c) The string -Markd) CR/LF AUX switch no. 5 Off/On = Mark Off/On Release Doc.no rev Page 9

10 Baud rate The COM port may operate at two speeds, or baud. AUX switch no. 6 Off/On = /9.600 baud. Danish letters Danish letters may be employed in the user texts, provided these are entered from a terminal using either DOS (cp 850/865), 7-bit ISO ore 8-bit ISO character sets. AUX switches nos. 1 and 2 select the character set used to write Danish letters to the COM port, regardless of which character map was used for input. If Danish letters will not be used, AUX switches 1 and 2 should probably be left in the Off position to avoid remapping of ISO-7 symbols [ \ ] { }. AUX switches nos. 1 and 2 govern: aux1 aux2 æ ø å Æ Ø Å OFF OFF < no translation > none OFF ON $91 $9B $86 $92 $9D $8F DOS ON OFF $7B $7C $7D $5B $5C $5D ISO-7 ON ON $E6 $F8 $E5 $C6 $D8 $C5 ISO Release Doc.no rev Page 10

11 Networking Several L-PS-X units equipped with RS-485 interface may be connected to a master controller which can address and hence communicate with each unit separately. When units are networked, automatic logging must be disabled, and Terse selected. The networking protocol solely implements commands 'MARK' and 'RST' for master controller usage. When L-PS-X is addressed with the MARK command, it will return a normal status line. When addressed with the RST command, alarms are reset and monitoring is restarted. An L-PS-X address consist of a segment number (0-255) and a host ID (1-254). The unit address may be inspected from a terminal attached to the COM port using the command CID Which will display the controller ID (decimal) seg.hid. The segment number may be changed using the command SEG nnn while the host ID is selected on the CID switch. Switch 1 = bit 0 etc. The networking protocol is line oriented. Each line starts with a header, proceeds with a command, and ends with CR/LF. A datagram consists of one or more such lines, terminated by > or * followed by 100 msec of inactivity. A header consists of:?tttt!ssss.!tttt?ssss. for a query, and for a response, where tttt and ssss are 4-digit hexadecimal addresses for 'target' (recipient) and 'source' (originator) respectively. A segment controller may broadcast to all network hosts by issuing the datagram for target $xxff (broadcast). No host may respond to a broadcast Release Doc.no rev Page 11

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