Eaton Electrical PROFIBUS-DP EZ204-DP - Manual (Page 79)

Read/write function block data
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Table 25: Index 00 – Parameters
Example:
Data 1 (Byte 5) = 0xA3, Data 2 (Byte 6) = 0x03
l
Resulting 16-bit value = 03A3
hex
Meaning: HY, OS, F2, F1 are assigned a constant; I1, I2 are
assigned to a variable such as I7, I8 C2...etc., appears in the
Parameter menu;
The output of the analog value comparator is active for as long
as the comparison (I1
×
F1) + OS = (I2
×
F2) + HY is fulfilled.
Table 26: Index 01 – Control byte
Meaning Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Appears in the parameter menu
Yes/no
0/1
Compare
FB not used
0 0 0
EQ (=) 0 0 1
GE ( ) 0 1 0
LE ( ) 0 1 1
GT (>) 1 0 0
LT (<) 1 0 1
Use as constant and therefore can be written to
I1= Constant
0/1
F1= Constant 0/1
I2= Constant 0/1
F2 = Constant 0/1
OS = Constant 0/1
HY = Constant 0/1
Not used 0 0 0 0 0 0
Bit 7 6 5 4 3 2 1 0
FB output Data 3 – – – – – – – Q1 1
1) Status 1 if comparison condition is fulfilled.