F_Max3_R - Siemens SIMATIC S7 F Manual

Fail-Safe Blocks
8.13.6

F_MAX3_R

Function
This block compares three inputs and then outputs the maximum value at the
output. All the inputs are preset with a value of -3,402823e+38 (largest negative
REAL number), so that even a maximum value can be formed from only two
inputs.
OUT = MAX {IN1, IN2 , IN3}
I/Os
Name
Inputs: IN1
IN2
IN3
Output: OUT
Error Handling
If the operation generates an invalid REAL number the event will be recorded in
the Diagnostic Buffer.
Error Information in Diagnostic Buffer
Error Code (W#16#...)
75D9H
8-120
Data Type Explanation
F_REAL Input variable 1
F_REAL Input variable 2
F_REAL Input variable 3
F_REAL Maximum value
Description
Invalid REAL number generated by the operation.
Default
-3.402823e+38
-3.402823e+38
-3.402823e+38
-3.402823e+38
Fail-Safe Systems
A5E00085588-03