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Programming 15088:J 10/22/99

3-65

4.3 Size Limitations

Each Control-By-Event has a physical size limitation of 14 bytes in control panel memory.

For initiating devices, the Control-By-Event size can be calculated by the following formula:

Size in bytes = 1 + (Number of Zones) + (Number of Control Modules X 3)

Example: The following Control-By-Event takes up 10 bytes in memory.

(Z1 Z6 Z12 L2M4 L7M15)

Size in bytes 1 + ( 3 ) + ( 2 X 3 ) +1 = 11

For notification devices, the Control-By-Event size can be calculated by adding the components involved

using the following values:

( = 1 byte Zones = 1 byte each

) = 1 byte Initiating devices = 3 bytes each

OR( = 1 byte

AND( = 1 byte The time specifications for the

NOT( = 1 byte DEL, TIM, and SDEL operators = 6 bytes

XZONE( = 1 byte

DEL( = 1 byte

TIM( = 1 byte

SDEL( = 1 byte

Examples:

1) The following Control-By-Event takes up 13 bytes in memory:

OR( Z1 Z4 Z9 Z16 Z23 LID3 L2M7 )

Size in bytes 1 + 1 + 1 + 1 + 1 + 1 + 3 + 3 + 1 = 13

2) The following CBE takes up 11 bytes in memory:

DEL( 00.00.30 00.01.30 ( Z1 ) )

Size in bytes 1+ 6 +1+1+1+1 = 11

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