Siemens ACCESS 9340 Reference Manual page 100

ACCESS 9340 and 9360 Meters
Chapter 7—Advanced Alarms
Table 7–3: Advanced Alarm Types
Type Description
Boolean
Logic
AND
100
Logic
NAND
101
Logic
OR
102
Logic
NOR
103
Logic
XOR
104
Disturbance (9360DC)
080 Voltage Swell
080 Voltage Sag
EN–92
The AND alarm will occur when all of the combined enabled alarms are
true (up to 4). The alarm will dropout when any of the enabled alarms
drops out.
The NAND alarm will occur when any, but not all, or none of the
combined enabled alarms are true. The alarm will dropout when all of
the enabled alarms drop out, or all are true.
The OR alarm will occur when any of the combined enabled alarms are
true (up to 4). The alarm will dropout when all of the enabled alarms are
false.
The NOR alarm will occur when none of the combined enabled alarms
are true (up to 4). The alarm will dropout when any of the enabled
alarms are true.
The XOR alarm will occur when only one of the combined enabled
alarms is true (up to 4). The alarm will dropout when the enabled alarm
drops out or when more than one alarm becomes true.
The voltage swell alarms will occur whenever the continuous rms
calculation is above the pickup setpoint and remains above the pickup
setpoint for the specified number of cycles. When the continuous rms
calculations fall below the dropout setpoint and remain below the
setpoint for the specified number of cycles, the alarm will dropout.
Pickup and dropout setpoints are positive and delays are in cycles.
The voltage sag alarms will occur whenever the continuous rms
calculation is below the pickup setpoint and remains below the pickup
setpoint for the specified number of cycles. When the continuous rms
calculations rise above the dropout setpoint and remain above the
setpoint for the specified number of cycles, the alarm will drop out.
Pickup and dropout setpoints are positive and delays are in cycles.
© 2008 Siemens Energy & Automation, Inc. All Rights Reserved.
PMCM-9340D-0208
Operation
2/2008