Rockwell Automation Allen-Bradley PowerFlex 700S - Multiply;Divide Blocks

210 Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011
Chapter 1 Detailed Drive Operation
Multiply/Divide Blocks
The multiply/divide blocks are used to multiply and divide floating point
parameters. It is possible to use the DInt to Real converter to convert one double-
integer parameter to a floating point value and use that value as an input to a
multiply/divide block.
Configuration:
• Parameter 1053 [MulDiv 1 Input] is the input value to be scaled as needed
with the multiplication and division function. This input will be
multiplied by parameter 1054 [MulDiv 1 Mul] and then divided by
parameter 1055 [MulDiv 1 Div]. The result will be loaded to parameter
1056 [MulDiv 1 Result].
Equation: (Par 1053 x Par 1054) / Par 1055 = Par 1056
• Parameter 1057 [MulDiv 2 Input] the input value to be scaled as needed.
This input will be multiplied by parameter 1058 [MulDiv 2 Mul] and then
divided by parameter 1059 [MulDiv 2 Div]. The result will be loaded to
parameter 1060 [MulDiv 2 Result].
Equation: (Par 1057 * Par 1058) / Par 1059 = Par 1060
Add/Subtract Blocks
The add/subtract blocks allow addition and subtraction of floating point
parameters. P1000 [UserFunct Enable], bit 05 “AddSub Math” is set to 1 to
enable the Add/Subtract user function, and set to 0 to disable the function.
• The equation for using the Add/Subtract blocks is as follows:
[AddSub x Input] + [AddSub x Add] - [AddSub x Subtrct] = [AddSub x
Result]
X
/
MulDiv 1 Input 1053
1054
1055
1056
MulDiv 1 Mul
MulDiv 1 Div
MulDiv 1 Result
X
/
MulDiv 2 Input 1057
1058
1059
1060
MulDiv 2 Mul
MulDiv 2 Div
MulDiv 2 Result
+
–
1103
+
–
1107
AddSub 3 Result
AddSub 2 Result
AddSub 2 Input
AddSub 2 Add
AddSub 2 Subtrct
AddSub 3 Input
AddSub 3 Add
AddSub 3 Subtrct
1100
1101
1102
1104
1105
1106