GE Industrial Solutions ASPMETER commiss - Manual (Page 16)

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COMMISSIONING GUIDE ASPMETER
DET-757 PAGE 16 ©2011 For technical support please contact 10111
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Global Alarm Registers (Per Panel)
Registers 224-227:
These registers provide a means of identifying alarm conditions without polling every
alarm and inspecting all the bits. A Global alarm register bit is set when a Branch
or Auxiliary alarm channel activates. For example, if Bit 2 in Branch alarm status 38
is set, then Bit 2 in the Global latching alarm status will also be set. This allows the
user to read the Global alarms only in the event of an alarm condition, minimizing
network traffic. Global Most-Recent latching alarm channel tells the user the number
of the channel that has had the most recent alarm event. Note: Bits 0 to 4 in Branch
alarm status correspond to Bits 0 to 4 in Global alarm status; higher Bits do not match
directly. An excerpt from the Modbus Point Map appears below; see the full Point
Map for more information.
Register Description
224 Global Latching Alarm Status;
Bit 0: High High Latching Alarm;
Bit 1: High Latching Alarm;
Bit 2: Low Latching Alarm;
Bit 3: Low Low Latching Alarm;
Bit 4: Latching Alarm OFF state declared (1=OFF; ON state must have
been achieved prior);
Bit 5-7: Reserved for future use (reads 0);
Bit 8: High Voltage Latching Alarm;
Bit 9: Low Voltage Latching Alarm;
Bit 10-15: Reserved for future use (reads 0)
225 Global Non-Latching Alarm Status;
Bit 0: High Non-Latching Alarm;
Bit 1: Low Non-Latching Alarm;
Bit 2-7: Reserved for future use (reads 0);
Bit 8: High Voltage Non-Latching Alarm;
Bit 9: Low Voltage Non-Latching Alarm;
Bit 10-15: Reserved for future use (reads 0)
Alarm Counters
The alarm counters measure the number of times an alarm has been set. On a
multi-master system, these counters indicate whether an alarm went off and
whether it was cleared afterward. It also allows one master to retain these records
even if another master has cleared the alarm. When any of the 46 corresponding
counters increment, the global variants of the latching alarm counters increment
correspondingly.