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1010/2020 INSTALLATION AND PROGRAMMING MANUAL PAGE 59

C.B.E 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) +1

Example: The following Control-By-Event takes up 11 bytes in memory.

( Z1 Z6 Z12 L2M4 L7M15 )

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

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

using the following values:

( = 1 byte

) = 1 byte

OR( = 1 byte

AND( = 1 byte

NOT( = 1 byte

XZONE( = 1 byte

DEL( = 1 byte

TIM( = 1 byte

SDEL( = 1 byte

Zones = 1 byte each

Initiating devices = 3 bytes each

The time specifications for the DEL, TIM, and SDEL operators = 6 bytes

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 or ( Z1 ) )

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

Due to the 14-byte size limitation, it may be necessary to use more than one equation or list to

accomplish a desired result. Through the use of reverse activating zones, an equation, which

normally would contain too many bytes, can be broken up into several smaller equations.

Notifier 1010 User Manual

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