Omron CS1W-CT021, Operation Manual

Page: 153 / 201

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Section 4-6
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4-6-2 Digital Inputs Generating Interrupts
Enabling / Disabling
Interrupts The 4 Digital Inputs can all be configured to generate interrupts to the CS1-CPU.
If a Digital Input is configured to generate interrupts, an interrupt is issued to the
CS1-CPU at a rising- or falling edge of the signal applied to the Digital Input. The
Function that is assigned to the Digital Input determines if the interrupt is gener-
ated at a rising- or falling edge (refer to 3-4
"Digital Input Functions" ).
You can (DM-) configure a Digital Input to generate interrupts by setting the corre-
sponding bit in the Interrupt Enable Data of the Digital Inputs. The Interrupt Enable
Data of the Digital Inputs consists of 4 bits representing the 4 Digital Inputs. By
default the Inputs are disabled to generate interrupts.
Bits 0, 1, 2 and 3 correspond with the Physical Digital Inputs I0, I2 and I3.
External Interrupt Task
Offset Every Digital Input that is enabled to generate interrupts is assigned to an external
interrupt task in the CS1-CPU. In the External Interrupt Task you should write an
appropriate (ladder) program that takes the required action on the occurrence of
an interrupt.
Number Function Interrupt on
00 No Function Rising Edge
01 Gate Positive Rising Edge
02 Gate Negative Falling Edge
03 Preset Rising Edge Rising Edge
04 Preset Falling Edge Falling Edge
05 Reset Rising Edge Rising Edge
06 Reset Falling Edge Falling Edge
07 Capture Rising Edge Rising Edge
08 Capture Falling Edge Falling Edge
09 Stop, Capture and Continue Rising Edge
10 Stop, Capture and Continue (Inv) Falling Edge
11 Stop, Capture, Reset and Continue Rising Edge
12 Stop, Capture, Reset and Continue (Inv) Falling Edge
13 Capture-Reset Rising Edge Rising Edge
14 Capture-Reset Falling Edge Falling Edge
15 Enable Reset Rising Edge
16 Disable Reset Rising Edge
General Setting:
m+5 I3 I2 I1 I0
Interrupt Enable Data Inputs
0 = Interrupts Disabled
1 = Interrupts Enabled
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
W902-E2-03.book Seite 138 Donnerstag, 7. Oktober 2004 2:06 14