Implement interrupt
- Thread starter mwcarlos
- Start date
elevmike
Member
Check page 5-26 of your DL05 user manual .
The immideate insturctions are explaned there. These are not interupts but will execute the insturction before the current scan is compleated. As far as I know these insturctions can be used with any input. I'm not sure that using the high speed inputs are intended for this purpose.
It is my understanding X0 - X2 are intended to be counter inputs, like from an encoder or other simmilar device. The intention is to provide up to a 5KH pulse count. How to use the counter inputs is also covered in Chapter 3 of the manual.
The only way to limit your scan time is to limit the length of your program. Various instructions require a different number of clock cycles to execute. Omron is really good at pointing this out in their manuals and provides execution times for each instruction. I havn't noticed this info in the ADC manuals, but I never looked for it. Anyway the more complex the insturctions the longer they take to execute.
Mike.
The immideate insturctions are explaned there. These are not interupts but will execute the insturction before the current scan is compleated. As far as I know these insturctions can be used with any input. I'm not sure that using the high speed inputs are intended for this purpose.
It is my understanding X0 - X2 are intended to be counter inputs, like from an encoder or other simmilar device. The intention is to provide up to a 5KH pulse count. How to use the counter inputs is also covered in Chapter 3 of the manual.
The only way to limit your scan time is to limit the length of your program. Various instructions require a different number of clock cycles to execute. Omron is really good at pointing this out in their manuals and provides execution times for each instruction. I havn't noticed this info in the ADC manuals, but I never looked for it. Anyway the more complex the insturctions the longer they take to execute.
Mike.
Last edited:
Eric Nelson
Lifetime Supporting Member + Moderator
Mike, I think Carlo is looking to use interrupts (Mode 40), or possibly the Pulse Catch function (Mode 50). See Chapter 3. The problem is that the DL05 only supports these functions on input X0 alone... 
Carlo, if you need 3 high-speed inputs, you should consider using a DL06, as you can use interrupts or Pulse Catch on X0, X1, X2, AND X3...
beerchug
-Eric
Carlo, if you need 3 high-speed inputs, you should consider using a DL06, as you can use interrupts or Pulse Catch on X0, X1, X2, AND X3...
beerchug
-Eric
elevmike
Member
Eric,
Opps, I never got past mode 20 (UDCounter) for obivious reasons.
Thanks for the correction.
Hey, but I got the chapter right! moon2
Mike
Opps, I never got past mode 20 (UDCounter) for obivious reasons.
Thanks for the correction.
Hey, but I got the chapter right! moon2
Mike
Thank You for your interist.
What I have is this:
Two convergent sensors, sensing on the round side of a rolling tin can. There is also a single trigger proxy, that would indicate when to take reading. The reading, however need to be taken the moment the proxy indicates it, because the speed of the can may vary.
So.. what I need is 1 interrupt trigger (X0), and two fast inputs (X1 + X2), so that my response time would be tipicaly less that 1-3ms.
Again thank you elevmike for the manuals!
Carlo
What I have is this:
Two convergent sensors, sensing on the round side of a rolling tin can. There is also a single trigger proxy, that would indicate when to take reading. The reading, however need to be taken the moment the proxy indicates it, because the speed of the can may vary.
So.. what I need is 1 interrupt trigger (X0), and two fast inputs (X1 + X2), so that my response time would be tipicaly less that 1-3ms.
Again thank you elevmike for the manuals!
Carlo
Last edited:
elevmike
Member
Carlo,
If you need more than 1 fast input, then you need to go to a DL-06 as Eric suggested earlier.
If your looking for an output from the PLC within 3ms from the input, this may be an unrealistic expectation. However please review, and or test the immideate instructions (STRI, STRNI, OUTI) etc.. These instructions execute before the end of the CPU scan, and may assist in providing the required response time.
What is the purpose of your reading? are you counting cans, checking for out of round, speed indication?? Your answer to this question may help in figuring a workaround.
Mike
If you need more than 1 fast input, then you need to go to a DL-06 as Eric suggested earlier.
If your looking for an output from the PLC within 3ms from the input, this may be an unrealistic expectation. However please review, and or test the immideate instructions (STRI, STRNI, OUTI) etc.. These instructions execute before the end of the CPU scan, and may assist in providing the required response time.
What is the purpose of your reading? are you counting cans, checking for out of round, speed indication?? Your answer to this question may help in figuring a workaround.
Mike
I want to use the convergent sensor to look for sque labels on cans => the sensor will activate if the reflective can is detected on a spesified distance from sensor. The reading, however must be maid, within 1-2ms, as the can travels at max 4 mm/ms. The ecjection of the can can however be don later.
As I see it I need the proxy to call an interrupt that will in turn make imediate messurements of the two convergent sensors. If a fault is detected, the ecjection procedure can be handeled in the main program.
Your input will be apriciated
Thanks
Carlo
As I see it I need the proxy to call an interrupt that will in turn make imediate messurements of the two convergent sensors. If a fault is detected, the ecjection procedure can be handeled in the main program.
Your input will be apriciated
Thanks
Carlo
elevmike
Member
Eric Nelson
Lifetime Supporting Member + Moderator
You might be able to do this application with the DL05. Set up input X0 as an interrupt, and set the filter times for X1 and X1 to zero (no filter). In the interrupt routine, use immediate instructions to read X1 and X2. The example on page 3-47 is pretty much perfect except for the filter times. Based on that example, your ladder should look something like this:
You interrupt routine will be based on what input state you're looking for on X1 and X2. Just be sure to use immediate instructions.
Again, I'm not positive this will be fast enough for your application, but it's worth a shot!...
beerchug
-Eric
P.S. You've been linking to Chapter 3 quite a bit lately, Mike. A favorite chapter of yours?...
| SP0 +-------+
|---] [------------+---| LD |
| | | K40 | Select Mode 40
| | +-------+
| | +-------+
| +---| OUT |
| | | V7633 |
| | +-------+
| | +-------+
| +---| LD |
| | | K4 | Set X0 as external interrupt
| | +-------+
| | +-------+
| +---| OUT |
| | | V7634 |
| | +-------+
| | +-------+
| +---| LD |
| | | K0006 | Set filter time for X1 and X2 to zero
| | +-------+
| | +-------+
| +---| OUT |
| | | V7635 |
| | +-------+
| | +-------+
| +---| OUT |
| | | V7636 |
| | +-------+
| |
| +-----( ENI ) Enable interrupts
........
|
+--------+
| INT O0 |
+--------+
| X1 X2
|---]I[-----]I[---------( OUT )
|
|-----------------------( IRT )
You interrupt routine will be based on what input state you're looking for on X1 and X2. Just be sure to use immediate instructions.
Again, I'm not positive this will be fast enough for your application, but it's worth a shot!...
beerchug
-Eric
P.S. You've been linking to Chapter 3 quite a bit lately, Mike. A favorite chapter of yours?...
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