Meggitt VM600 Hardware Manual

VM600 MPS hardware manual (standard version) MAMPS-HW/E 4 - 15
Edition 17 - February 2018
Alarm monitoring
MPC4 / IOC4T CARD PAIR
4.6 Alarm monitoring
4.6.1 Monitoring possibilities
For each measurement (for example, vibration) channel, the MPC4 can compare the
measured value against user-configurable Alert and Danger levels. For each of these, a high
limit and a low limit can be set:
• Danger+, the upper Danger level (for an increasing signal)
• Alert+, the upper Alert level (for an increasing signal)
•Alert, the lower Alert level (for a decreasing signal)
• Danger, the lower Danger level (for a decreasing signal).
For each speed channel, the following alarm levels can be set:
• Alert+, the upper Alert level (for an increasing signal)
•Alert, the lower Alert level (for a decreasing signal).
A time delay (t) can be software configured for each Alert or Danger level. The signal level
must be over (or under, in the case of low-level alarms) the alarm level (including the
hysteresis value) for more than t before an alarm is generated.
A hysteresis value can be software configured for each Alert or Danger level.
The alarm events can be latched if required. The alarm latches can be reset either externally
or via the CPUM card (if installed).
The example given in Figure 4-6 illustrates alarm latching when t = 3 seconds.
Figure 4-6: Illustration of unlatched and latched alarms
Signal level
Time
Hysteresis
Normal Alarm Normal
Normal Alarm Normal
Alarm Reset
A+ status
unlatched
A+ status
latched
Time
D+
A+
A
D
t  3st < 3 s

Meggitt VM600 Specifications

General

Brand	Meggitt
Model	VM600
Category	Measuring Instruments
Language	English