Honeywell XI581AH User Manual page 42

EVERYDAY OPERATIONS
EN2B-0126 (74-3554-8)
Modem Configuration
Application Memory Size:
128 Kbytes
Remote Trend Buffer
104 Entries
This screen is used to increase or decrease the size of the adjustable remote trend
buffer. The number of entries (trend samples) that can be stored in the buffer for
Remote Building Central A is determined by a calculation by the controller based
upon the Application Memory Size entered in this screen. This calculation is as
follows: The value entered in this screen is subtracted from the total application
memory, and the resulting number, in Kbytes, represents the amount of memory
available for remote trend buffering. The following figure provides an example for
the adjustable remote trend buffer.
TOTAL APPLICATION MEMORY
UNUSED APPLICATION MEMORY
e.g. 58 KBYTES
APPLICATION
128
e.g. 70 KBYTES
KBYTES
Fig. 13. Adjustable remote trend buffer example.
The default for Application Memory Size is the size of total application memory
detected by the controller. The default number of trend buffer entries is 104.
The maximum number of trend samples will be displayed once a value for
Application Memory Size is entered. For a full explanation of this feature of the
controller, see Excel 100/500/600 Software Description, EN0B-092.
NOTE: The minimum Application Memory Size is 38 Kbytes.
7. To increase the size of the buffer, enter a new (lower) value for Application
Memory Size using the cursor keys and confirming with Enter. The controller will
perform a calculation and then display the new number of entries or samples
that the remote trend buffer can hold. After this, RESTART appears highlighted
at the bottom of the screen.
Modem Configuration
Application Memory Size:
58 Kbytes
Remote Trend Buffer:
1360 Entries
8. Press Enter (↵) to restart the controller.
IMPORTANT:
If the application being downloaded exceeds the Application Memory Size
entered in this screen, an error message will occur, and the download will
not be executed.
NOTE: Firmware V2.03.01 or later and CARE V2.02.00 or later enable the
controller to run RACL partly from out of the Flash EPROM. Thus, the
application memory calculation is different compared to older versions.
This has to be considered during start up once you enter the application
memory size.
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XI581/2 BUSWIDE OPERATOR INTERFACE
BACK
58 KBYTES
= 1263 ADDITIONAL TREND SAMPLES
+ 104 TREND SAMPLES (DEFAULT)
= 1367 T0TAL TREND SAMPLES
RESTART
REMOTE TREND BUFFER