Axel WOLF 1MS, Руководство пользователя, Страница: 107 / 229

| 107
14.6.25
Note 2: PS Settings
As already specified for the alarms driven by an missing truth condition, the invalid condition is often not related to a
precise timing. In this case if at the end of the timeout all conditions required aren’t verified the alarm is raised and the
start of the failure is placed the second after the last valid condition has been verified. The Ps in the varibind is sampled
in this moment and so can be even a PS valid. Please consider this behavior definitive. About the alarm triggering rules,
please read again the matching criteria for rising an alarm.
Wolf2MS can perform various type of checks on received PS. As can be seen in fig. below, there are four Reference
Masks (set by default to ‘********’), a CharRef (an asterisk by default), a Timeout field and an Hold field.
System can compare received PS with UP TO four PS Reference Masks. If a Ref Mask is empty no check is performed
for that field. CharRef field specify a character (that can be chosen and modified by user) that can be used into PS Ref
Masks as a WILDCARD. So
, for example, if CharRef=’*’ and PS Ref 1 = “RADIO***” both received PS = “RADIOABC”
that “RADIO123” match with Ref 1. Please pay attention to PS Ref field length. It can be from 1 up to 8 chars long.
Further inserted chars will be ignored. If a 8-chars long PS Ref is specified, the system check for a precise match with
received PS (of course taking into account any wildcard occurrence), otherwise PS Ref is considered as a sub-string to
be searched for into received PS (wildcard rules are still true). There are four types of operative scenario:
1. At least one PS Ref not empty. Timeout > 0.
System compares received PS with all not empty PS and it search for at least a match with ALL not empty Ref mask in a
time under Timeout value. Example: Ref1=”RADIO1”, Ref2=”RADIO2”, Ref3=”RADIO3”, Ref4=”” (empty), Timeout=45
sec.
Received PS must change in time and should contain “RADIO1”, “RADIO2” and “RADIO3” (not necessarily in this 3/3
order). System should recognize at least an occurrence of all three values in 45 seconds or an alarm condition raises up.
2. At least one PS Ref not empty. Timeout=0.
System compares received PS with all not empty PS Ref (sub)string. If a match with anyone of them is found, no alarm
condition is set, otherwise alarm rises up instantaneously.
3. ALL Ps Ref empty. Timeout > 0.
System checks only for PS content variations (in a time not exceeding Timeout). This is useful for PS scrolling monitor.
4. ALL Ps Ref empty. Timeout=0.
No check is performed by system. This is not
a ‘real’ operative mode. NOTE: Ref Mask formed by 8 wildcards will match
anyway.