Hello,

 I need to impliment an application where i need to capture HIGH SPEED input, process and generate output between certain count value(variable) and capture the analog input value during this output generated time !!!

1. High speed digital input signal (24v) of 300mico second on-300 micro second off will be coming from field. Shaft of the rotor having 20 points. so i will get 20 pulse/rotation.

2. There is one more DI i will get from this shaft once/rotation.

3. So i need to manage my count in between 0-20. Customer will set one start and end point in display. say 10 & 15. So when my count value is between 10-15, need to generate one Digital output.

4. Same time when it is generating the DO, I need to capture one AI value( 4-20ma connected to PLC). Its nothing but when DO is high, one valve(say) will get open and there are few components kept infront of that. Sensor is on other side of the componenets. So i need to measure loss(say) happend here. 

I consulted with technical support team, they suggested for TM Count module, High speed analog processing card. Now hardware is ready with me and starting to develop the logic.

Now am concentrating on first part, reading count- comparing- generating output ir-respective of my SCAN CYCLE/TIME. So TM Count is used. But thing is that i need to use HSC block for TM Count to get pulse (may be some other way will be available) this will kill my requirement and scan time will come in to picture.

From FM ( S7-400 ) vs TM ( S7-1500 )//TM COUNT -INDEPENDENT OF SCAN CYCLE/TIME

I can see our expert also stating the same. So i would like to get suggestion from our friends here to complete my requirement.

S7-1500 -1512C -1PN

ET200SP- 6ES71556AU000BN0

TM- 6ES71386AA000BA0

AI-6ES71346HB000DA1

(Nb:- Same application is already proved by Bechoff)

Hello,

S7-1512C, ET200SP IM-HF, TM COUNT, AI -HS are there with me.

From Industry support team, i got suggestion that with TM COUNT module and Analog input High Speed with IM-HF will do my requirement. Now am in testing /proving stage, I have configured the TM Count module as well as AI-HS card also. I need to capture pulse of 300micro second. also need to generate output between certain count value.

1. Now TM count module is configured and assigned to OB61, isochronous OB. Kept this ob61 cycle as minimum- 1.125ms. At that time HSC BLock ready was not coming and counting was not happening. So added same HSC block to OB1 also. Now HSC block become healthy and started to count.

2. To checking the count block, its working based on scan cycle or not- I made min scan time to 5s(via hardware configuration setting) and tested. Found its ir-respective of scan time(OB1 cycle). But will it depends on 1.125ms (OB61 cycle time?? Because i have read n manual that it will count when the block is called). I dont kow how to check this.

3. I need to generate output between certain setpoints. So i made TM D02 output (second digital output of counter module) generation as per user program setup. Made compare block in OB61 and generated output. This also working, but here also am afraid its based on OB61 scan?

4. I need to capture analog input signal very fast. So I made Profinet IRT configuration with 1.125ms clock time (lower than this value is available, but i think i need to link AI again with OB61, where its minimum is 1.125. So software not allowing to keep send clock time < 1.125) . Also made oversampling by 8 (As suggested by industry support). As per manual, when we do oversampling; IM will store all the samples and will update to OB61 together in its call. With this i will able to achieve capture in each 200micro second.

5. But in above case, how can i see all the captured samples?

6. I configured move block for moving PIW value to Memory in OB61 again, will it show all the AI value foe 200 micro second (say)

7. Now to monitoring purpose, i dont have any option. So i made trace and linked update with OB61 and monitoring. Here also am not sure TRACE will show all the valued update with respect to OB61?

8. Is there any other option available to display these High speed signals?

9. As seen in wincc classic with s7-400 AR-SEND; what option is available in 1500 & WinCC advance/Professional For faster data log?

Hello, 

counter part completed, with TM COUNT module settings.

Now need to capture/log analog data to WinCC at maximum speed.

Anybody knows option available in s7-1500 & Wincc Classic/professional ? like 

How can you use process-driven archiving in WinCC for a process tag with SFB37 (AR_SEND)?

Dear Pegaia,

thank you for the reply.

Now things are clear to me, But still not able to prove the system.

Basically i need to capture AI value precisely at the moment when TM Count generate output. So i looped TM count output to DI of 1512C cpu and triggered OB40(HW Interupt) and written as,

L PIW XXX

T MW XXX. 

Then multiplied by scale factor. Now requirement is, if this scaled/captured AI is out of range (customer will give setpoint as per product) i need to generate DO to reject the product after 16 pulse of same TM output.

Now i can see AI is getting captured and am logging it in to the DB.( with tm pulse-> increment DBD count and storing all captured value in different location). But the captured is not correct always !!! 

i have AI card in 1512C onboard and on profinet with HS feature. Now doing the AI configuration in profinet im with over sampling. After oversampling it shows 60 microsecond. But it may not get update to OB40 at the time of my call.. 

So any suggestion ?

Dear Pegaia,

Am attaching the trace when machine is running @ full RPM. X-Axis is in milli second.

Earlier i was using AI-HS card connected on Profinet with IM-HF. Now i want to make try with on board AI input. In between i seen the below link, about calculating cycle time of AI card.

Where can i see the cycle time for 1512C-1 cpu's AI. I am not enabling the diagnose feature & input is 0-10v.

As per your experience, on board AI can give quick response or AI-HS connected to IM-HF can give latest value? Kindly suggest..

How do you calculate the cycle time of the S7-1500 analog input module AI 8xU/I/RTD/TC according to the number and type of channels used?