Device Profile Area
Manual • Doc.-No.: C.3020.21 / Rev. 1.5
CAN-CBX-AI814
Page 92 of 108
8.10.10 Analog Input Interrupt Delta (6426
h
)
Index
Sub-
index
Description
Value range
Default
Data type
Access
mode
6426
h
0
Number_Analog_Inputs
8
8
unsigned 8
ro
1
Analog_Input_IRQ_Delta_1
0...FFFF0000
hh
0
unsigned 32
rw
2
Analog_Input_IRQ_Delta_2
0...FFFF0000
h
0
unsigned 32
rw
3
Analog_Input_IRQ_Delta_3
0...FFFF0000
h
0
unsigned 32
rw
4
Analog_Input_IRQ_Delta_4
0...FFFF0000
h
0
unsigned 32
rw
5
Analog_Input_IRQ_Delta_5
0...FFFF0000
h
0
unsigned 32
rw
6
Analog_Input_IRQ_Delta_6
0...FFFF0000
h
0
unsigned 32
rw
7
Analog_Input_IRQ_Delta_7
0...FFFF0000
h
0
unsigned 32
rw
8
Analog_Input_IRQ_Delta_8
0...FFFF0000
h
0
unsigned 32
rw
In this object the difference value of the analog input voltage, which can be evaluated for triggering the
interrupt, is defined. Via object 6421
h
the type of evaluation is selected. The interrupt function is
enabled via object 6423
h
.
Positive and negative changes of the voltage are evaluated.
The value Analog_Input_IRQ_Delta_x is always the absolute value of the difference between the
current AD value less the last preceding AD value.
The difference of the AD values is contained in object 6426
h
always as a positive value.
Provided that the objects 6421
h
and 6423
h
are configured accordingly, the interrupt will be triggered
if the difference of the AD values equals or exceeds the value Analog_Input_Interrupt_IRQ_Delta_x.
Per default this value is '0'. Thus the interrupt is always triggered, because the difference is always
Æ
0.
Note:
Only the 16 higher-order bits of the 32-bit-variables Analog_Input_IRQ_Delta_x are
evaluated. Thus the minimum value is 0001 0000
h
, i.e. 312.5
Ç
V.