Hi,

The capabilities of the shared device functionality depend on the signal modules used. Some modules allow only one controller to access the data, while others allow multiple controllers to access the data (module-internal shared input/shared output). For more information, see:

• Module-internal shared input/shared output (MSI/MSO)
  
• How, in STEP 7 (TIA Portal), do you configure access to a shared device and the function Module-internal Shared Input / Shared Output (MSI /MSO)?
  
• Which IO controllers and IO devices support the following functions in STEP 7 (TIA Portal): IRT, prioritized startup, MRP, MRPD, PROFIenergy, Shared device, MSI/MSO, I device, clock-synchronized mode, system redundancy and option handling?
  

Kind regards
Stefan

Hello,

next sugestion to Stefan's one. If that IM is simple PN external I/O station to maybe PLC2 as controller then it can be easy to create PLC1 as PN IO controller and PLC2 as IO device, where expected areas (from external IM) can be mapped inside IO exchange table. Logically, PLC2 (if IM is attached to it) knows that I/O areas from IM as they are mapped to it via PN and then can be simply mapped as IO-device exchange areas to PN controller PLC1. Simple example and only one exchange data via PN connection. Hope I understand your PN network correctly..

Hi,

In the case of DI 32x24VDC BA, when MSI is enabled, the value status is always enabled. See "Address space" for details.

Kind regards
Stefan

Hi,

AutoGen_2976344

Can I use this status bits e.g. if status bit have false it means something happened with communication? or data exchanging not working? or???

Yes, the value state bits can be used to detect a communication error. For some other devices, the value state will also indicate a channel error, but the basic (BA) module does not support channel diagnostics.

Kind regards
Stefan