Send data TXD548)

[NoBoots]

Hi,
 

After a long time, searching for missing communication I think to have found the cause.

In this CMP2A plc there is a receiving device connected to the RS-232 port. .

During operation it can happen that in the same cycle there will be 2 functions to send different data..
I never receive those 2 data,  only 1 is received.

I can set a delay for sending this but this seems to be 'overkill',

Is there a simpler way to do this..?

The 2 pics are part of the program.

After putting the P_off before the other transmits, I always receive the TXD(48) DM1621...

 

Please advise,

 

 

 

[lostcontrol]

You don’t need to set a delay necessarily (although a small one won’t hurt), but check/wait for the port to be not busy/InUse