V570 + V200-18-E4XB PULSE WITH MODULATION

[Martinas]

Hello,

 

Iam new here, recently i started use Unitronics for my projects, so i have question.

 

1. Can i use PWM FB  for not-high speed digital output?

 

I want control heater. Cycle time will be about 10s, duty cycle depends from PID output.

 

 

I read examples, some forum threads..but i did not found accurate answer .

 

 

Iam asking for a help.

 

Best regards

[Emil]

Hi Martinas,

In FB PWM cycle time is given in ticks of 2.5 ms. There is no theoretical limit for number of ticks and this way - the sycle time. For example - you can srt cycle time 4000 ticks of 2.5 ms, wich means it will be 10 seconds. You can drive any digital output from FB PWM, including relay.

I hope thhis answers your quesiton.

[Martinas]

 You wana  say 2.5 ms its system scan time?

 

 

 

 for example if i give 4000 units (cycle time) and 500 units ( duty cycle), then system will understood  that i want scan 4000 times  and 50% of scans will have  value 1 in memory bit?

 

 

Thanks for your response

[Joe Tauser]

Yes - the output will be on for 50% of the total cycle time (4000 x 0.0025 = 10s) -> 5 seconds.

 

Joe T.