Eaton Electrical PROFIBUS-DP EZ204-DP - Manual (Page 129)

Read/write function block data
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Table 55: Operand overview
Table 56: Index 0: Bit IO
Table 57: Index 1 - Mode
Index
(hex) Operand Read Write
00 Bit IO, J Table 56
×
01 Mode, J Table 57
×
02 First operand I1 × c 1
03 Second operand I2
×
c 1
04 Result QV
×
1) The value can only be written if it is assigned to a constant in
the program.
J
The data for index 2 to 4 is transferred as a 32-bit value in
Intel format (Data 1 – Low Byte to Data 4 – High Byte).
Bit 7 6 5 4 3 2 1
FB output Data 3 – – – – – ZE 1 CY 1
1) Status 1 if the value of the function block output QV (the
calculation result) equals zero
2) Status 1 if the value range is exceeded
Data 1
(hex)
00 ADD Add (I1 + I2 = QV)
01 SUB Subtract (I1 – I2 = QV)
02 MUL Multiply (I1 × I2 = QV)
03 DIV Divide (I1 : I2 = QV)