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EXCEL 50/100/500/600/800 ALARM HANDLING
EN2B-0092GE51 R0512
51
Table 21. Avoiding alarm datapoint showers
Reason for fault Module alarm Point alarm
Care 3.x applications
for controller
firmware V. 2.04.xx
defective module or power failure
"I/O board missing" (54)
"I/O board present" (103)
"hardware failure" (109)
"hardware OK" (110)
sensor break / short-circuit or
missing NV update from bound NV
"hardware failure" (109)
"hardware OK" (110)
Care 4.x applications
for controller
firmware V. 2.04.xx
defective module or power failure
"I/O board missing" (54)
"I/O board present" (103)
"board missing" (130)
"board present" (131)
sensor break / short-circuit or
missing NV update from bound NV
"hardware failure" (109)
"hardware OK" (110)
Care 4.x applications
for controller
firmware V. 2.06.xx
defective module or power failure
Due to open LON, module
alarms are no longer possible!
"board missing" (130)
"board present" (131)
sensor break / short-circuit or
missing NV update from bound NV
"hardware failure" (109)
"hardware OK" (110)
Procedure Engineer CARE 4.x applications for controller firmware version 2.04.xx, and then
suppress the datapoint system alarms 109 and 110 by placing the @ character at
the first position of the corresponding alarm text.
User Program Alarms
It is possible to generate alarm signals at any point in the user program by using a
special program command.
The alarm text can be individually created and may contain up to 18 characters.
Data Storage
Each alarm is stored in the alarm memory that can hold up to 99 alarms. Alarm sig-
nals in the alarm memory contain neither an indication of the nature of the alarm
signals in the alarm (critical/non-critical) nor an acknowledgment of the alarm on the
operator interface.
The alarm memory entry contains user address, alarm text, date, and time. If the
memory capacity is exceeded, new alarm signals are accepted, such that the last
99 alarms always remain in the alarm memory.
The alarm memory can be viewed on the XI581 (not with XCL5010, Excel 100C),
XI582 and XL-Online operator interfaces and the Excel 50 MMI.
Alarms Sent across the System Bus
Alarm recovery Once the capacity of the temporary alarm buffer for system alarms is reached (max.
99 alarms for firmware 2.03.xx or lower, and max. 50 alarms for firmware 2.04.x),
then any additional alarms cause the datapoint to be labeled "in alarm" and given a
description of the type of alarm that has occurred. Labeling is carried out only for
the last occurring alarm for that datapoint.
When a C-bus connection to a front-end has been established, then all alarm
messages of the temporary system alarm buffer are sent to the front-end. After-
wards, alarms for datapoints that are labeled “in alarm” are sent directly to the C-
bus (except those that are in alarm suppression).
If the controller’s alarm history buffer still contains information related to such an
alarm, then this information is sent to the front-end. Otherwise, only the alarm type
(without data or time) is sent. In this case, the datapoints appear at the front-end
with an asterisk indicating that the data and time shown do not correspond to the
generation of the alarm.
Refresh list deletion (V1.5.x) If an XBS or XL-Online is disconnected from the bus/controller, then the refresh list
is deleted after a period of 2 minutes. This allows point values to be updated that