How can I get the number of RX's?

[gabrieltfs]

Hi

I need to count the number of times the PLC receive some information. As shown in picture below, the receptions' number is 113, but when I try counting it using the SB 135 and a Increment, the number in MI 0 is less than the number in the serial monitor. The counter can't get all the packages. For example, the serial monitor shows me 113 but MI 0 shows me 50. How can I solve it?

 

Thanks

[Joe Tauser]

I've never tried it, but did you look at the value in SI 274?

 

Joe T.

[gabrieltfs]

It's not working. The value is not counting and is always 0, but serial monitor is counting. When I try COM 2 using "Online Test", the value is the same of serial monitor, but in COM 1 (Pulses of messages) the value does not change.

 

Thanks

[DaveE]

Not for nothing

but your thumbnail  of the RX port shows com 2 and your ladder is SB135 com 1  maybe thats why?

[Cam]

SB136 is the data receive bit for COM2(as noted by DaveE thats the one in your pic)

 

If your using the Protocol Scan FB there is a MB(user selected) that sets when it receives a valid message.  Have you tried using this MB as the trigger for the count?