User manual

Read/write function block data

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Table 52: Operand overview

Table 53: Index 0: Bit IO

Table 54: Index 1 - Mode

Index

(hex)

Operand Read Write

00 Bit IO, J Table 53 ×

01 Mode, J Table 54 ×

02 Comparison value 1 I1 × c

03 Gain factor for I1 (I1 = F1 χ value) F1 × c

04 Comparison value 2 I2 × c

05 Gain factor for I2 (I2 = F2 χ value) F2 × c

06 Offset for value I1 OS × c

07 Switching hysteresis for value I2 (the value of HY

is for both positive and negative hysteresis.)

HY × c

1) The value can only be written if it is assigned to a constant in the program.

The data for index 2 to 7 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 0

FB output Data 3 – – – – – – CY

1) Status 1 if the value range is exceeded

2) Status 1 if the condition is fulfilled (e.g. I1 < I2 with LT mode)

Data 1

(hex)

00 LT Less than (I1 < I2)

01 EQ Equal to (I1 = IGT)

02 GT Greater than (I1 > I2)