Страница 9: ДСТУ EN 50131-1:2014. Alarm Systems - Intrusion and Hold-Up Systems - Part 1: System Requirements (61223)

8.4 Processing

Subclause 8.4, including subclauses, simply states that events are processed according to Table 7. Although Table 7 of EN 50131-1:2006 includes reference to indications, it is primarily concerned with notification requirements. In terms of indications, Table 7 merely states that all processed generic events shall cause an indication to be available (in this case to access levels 2, 3 and 4 users). It does not require indication at access level 1. The requirements for indications given in 8.5 take precedence over Table 7.

Table 7 Explanation

This interpretation uses the following excerpt of Table 7 showing just grade 2 to allow explanation. The indication section has been removed for clarity.

Table 2 - Excerpt of Table 7

Key:

M = Mandatory, NP = Not Permitted, Op = Optional

Information relating to the Zone of the Hold-Up alarm to be included in the information transmitted to an ARC.

Explanation

1. The column headed “l&HAS Status” refers to the status of the part of the system in which the event originates. If that part of the IAS is set then the upper part of the table applies. For Hold-up signals or messages the status refers to the status of the HAS. The IAS and HAS should be considered separately.

2. In some cases the status of the part of the system in which the event originates may be unknown (for example, an interconnection fault is detected in a part set system). In such cases the l&HAS should cause the most appropriate notifications permitted as are relevant to the current status of the l&HAS.

3. The column headed “outputs” refers to “External” and “Internal" WD. “External" means “not within the supervised premises". This does not necessarily mean outdoors.

4. The “ATS message type” refers to the type of message used in notification to the ARC.

5. The footnote “b” (relating to hold-up zone information) explains that there is a requirement for sufficient information to be sent to an ARC to enable them to direct an alarm response organisation (e g. guards or police) to the correct part of the supervised premises. If no such differentiation is required for particular supervised premises then the extra zone information is not required.

6. The requirements of Table 7 may be modified by other clauses of EN 50131-1:2006. These clauses are listed here.

8.3.8.2 Detectors located on an entry route can be ignored during unsetting.

8.4 Detectors can be logically grouped or multiple signals or messages required from

individual detectors before being considered as a signal or message in Table 7.

15 minutes duration (or less if local or national requirements apply).

Notification by a WD may be suppressed if the ARC confirms it has received the notification message.

If an ATS is used, operation of the WD may be delayed by up to 10 minutes and during that time cancelled if the ARC acknowledges the message.

PPS fault notification may be delayed by up to 1 hour (and therefore may not occur if PPS returns prior to notification).

8.5 Indications (Tables 7, 8 and 9)

Table 7 of EN 50131-1:2006 states that, for intruder, hold-up, tamper and fault signals or messages, indication is mandatory. This however refers to the availability of indications to users at access levels 2, 3 and 4. The set and unset status refers to the status of the part of the IAS or HAS (as appropriate) from which the signal originates. The requirements for which indications must be available at access levels 2, 3 and 4 are given by Table 8 and the restrictions for indications available at access level 1 are shown in Table 9.

8.5. General - [Indications at access levels 2, 3 and 4] (Table 8)

Only users that have been authorised at access level 2, 3 or 4 (see 8.3.2) are permitted to view or hear information about the system other than that listed in Table 9. It is permitted to inform (visually, audibly or in any other manner) authorised users about any system information (regardless of whether the system is set or unset) but Table 8 lists the items that the l&HAS must make available. See Table 3 below. Subclause 8.5.1 states that it must be possible to perceive these indications from at least one single location but individual indicators may also be distributed throughout the supervised premises.

When the access levels 2, 3 or 4 user is no longer accessing the information of Table 8, it should become inaccessible to access level 1 users. This could be achieved, for example, by the use of a timer that clears a display after a short time.

It is not mandatory for all users to be provided with all indications. It is however mandatory (when an “M" appears in Table 8) for the l&HAS to make the indications available (how this is done is a matter for the equipment/system designer) to suitably authorised users. For example, a user with authority to set and unset only part of a system may be restricted so that information pertaining to other parts of the system is not available to them.

The alert indication (available to all users) informs authorised users that further information is available. Whilst viewing the further information, it is possible that yet further information is available. The user must be made aware of this by use of a “pending indication”.

The following table (Table 3) shows the association of the indications with certain attributes and the relationship between Table 8 and Table 9.

The alert indication is the result of the availability of any indication (with the exception of the pending indication) that is not also available at access level 1. Although a “set" or “unset” indication at grades 3 and 4 fulfils these criteria, an alert is not permitted in these circumstances.

E

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Table 3 - Contents of Table 8 and Table 9