Eaton easy800

5 Function blocks
5.2 AR, Arithmetic
142 Control Relay easy800 11/11 MN04902001Z-EN www.eaton.com
The following examples illustrate the functions of the function block for every
arithmetic operation:
Addition examples
• 42 + 1000 = 1042
• 2147483647 + 1 = Last valid value before this arithmetic operation,
due to overflow (CARRY) AR..CY = Status 1
• -2048 + 1000 = -1048
Subtraction examples
• 1134 - 42 = 1092
• -2147483648 - 3 = Last valid value before this arithmetic operation,
due to overflow (CARRY) AR..CY = Status 1
• -4096 - 1000 = -5096
• -4096 - (-1000) = -3096
Multiplication examples
• 12 x 12 = 144
• 1000042 x 2401 = Last valid value before this arithmetic operation,
due to overflow (CARRY) Correct value = 2401100842 AR..CY = Status 1
• -1000 x 10 = -10000
Division examples
• 1024 : 256 = 4
• 1024 : 35 = 29 (The places after the decimal point are omitted.)
• 1024 : 0 = Last valid value before this arithmetic operation, due to
overflow (CARRY) (mathematically correct “Infinity”) AR..CY = Status 1
• -1000 : 10 = -100
• 1000 : (-10) = -100
• -1000 : (-10) = 100
• 10 : 100 = 0
Memory
40 + per 4 Byte/Constant at function block
input
Cycle time [μs]
easy800 standard easy800-SWD
ADD
32 12
SUB
33 13
MUL
38 16
DIV
41 18