PTZ Controller Master/Slave problem

[sigmaalpha 0]

I have 2 PTZ controller (A) and (B) and Two PTZ (P1) and (P2). Both controller have RS-485 (1) master and RS-485 (2) slave.

 

My connection and settings are as follow:

- PTZ (P2) connected to PTZ (P1)

- PTZ (P1) connected to controller (A) on RS-485 (1)

- Controller (A) port RS-485 (2) is connected to Controller (B) on RS-485 (1)

 

Controller (A) is Master and controller (B) is a Slave.

I can Control the PTZs only from controller (A)! no control can be made from controller (B). (PELCO D is the protocol).

 

If I connect both controller in parallel and not in chaine I can control the PTZ from both controller but it's not an acceptable solution.

 

Can any one help me please.

Regards

[Soundy 1]

If I connect both controller in parallel and not in chaine I can control the PTZ from both controller but it's not an acceptable solution.

Why not?

 

Do you have the termination set properly? Termination should be on for P2, off for P1, and if the controllers allow you to set termination (they should), make sure it's off for A and on for B.