The "Local" LED blinks to indicate that a fault is unacknowledged. The LED continues
to be lit until the fault is no longer pending even after the fault is acknowledged with the
"Ack" button. "Ack" resets the fault relay if a fault relay is configured.
Fault acknowledgement
The same applies to unacknowledged "System" faults in the event of a configured fault
relay. Without fault relay, a "System" fault is acknowledged automatically, i.e. the
"System" LED is lit immediately (no blinking until acknowledged).
External fault acknowledgement is possible via digital input, provided the input is
connected to input "Ack" on function block "Faults".
System report
The central communication unit can generate system reports and periodically send the
system operating state to different types of message receivers.
History
The history includes the last 500 events on faults, fault messages, and system reports.
The events are entered in the circular message buffer of the central communication
unit. The history data can be read via web browser and the ACS software.
Offline trend
"Offline trend" allows logging values for selected data points of the central
communication unit and for Synco devices listed in the device list. The ACS7 software
is necessary to define trends and trend displays on an operator station as well as to
specify data exports (e.g. to Excel).
5 offline trends can be defined and run at the same time. One trend may contain 10,000
values (number of data points x number of samplings).
Central communication unit memory to log for each trend:
Examples
•
1 data point at 30 second intervals for 83 hours.
•
6 data points at 30 second intervals for 27 hours.
•
10 data points at 5 minute intervals for 7 days.
The number of values that can be logged is reduced if text information (e.g. input
names, aggregate names for runtime totalization) is also recorded.
Ordering and delivery
When ordering, provide both name and
product number (ASN)
:
•
Central communication unit
OZW775
The central communication unit is delivered in a box. The following are inserted in the
package:
•
Installation instructions G5663 (multilingual).
•
CD with ACS700 software.
Commissioning instructions C5663 saved as a PDF file on the CD.
Order the following accessories separately:
Accessories
•
Ethernet card
OZZ7E5
•
CF card (Compact flash card)
OZZ7CF
The CF card contains the latest firmware version and web server data. See document
G5663 on firmware updates and preparing web server data.
Note
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Building Technologies
Central communication unit OZW775 V2.0
CE1N5663en
HVAC Products
29.10.2008
