problem with communication RS232 PLC V1210

[Hamza1]

Hello 

i have problem with communication RS232 i us PLC v1210 i need communicate with 10 different device problem that i cant receive message from all all time i receive from device number 1. 3. 5. 7. 9

i dont know where is the problem ?

[cantcliff]

RS-232 is a point-to-point protocol.  You can't have multiple devices on an RS-232 connection without some very clever work arounds.

 

You want to use RS-485 for multiple devices as it's designed for it.

[Hamza1]

hi cantcliff

 

i cant us RS-485 because my devices dont have this option

[s.pratt]

hi cantcliff

 

i cant us RS-485 because my devices dont have this option

 

 

What other communication lines does your end devices support? 

 

Can you add RS323 to RS485 converters?  As cantcliff has stated, RS232 is point-to-point only - there is no way to address multiple nodes.  You will need some sort of third party device to communicate to multiple devices with RS232, such as an RS232 to RS485 converter.

[Hamza1]

thank you acsely i found solution for may problem i change seting of can initialize ( baud rate) i go form 57600 to 38400 . now i receive messege from all devices 

if some one want see my programme i dont have problem to send

[cantcliff]

Just a warning, you may get un-intended communication issues sticking with RS-232.  It can work as multi-tap but was never intended. 

 

 

Make sure you have sufficient sanity checks in your program to prevent process problems from bad communication.