What is logical System in SAP ?
Logical system enables the system to recognize the target system as an RFC destination. Logical system is required for communication between systems within the landscape. You need a logical system when you create a new client in SAP
T-Code to create Logical System in SAP is BD54
Logical System is transportable.
How to create Logical System in SAP ?
1. Run transaction code BD54. Click on pencil icon to covert from display to change view. Then, click on New Entries.
for ex. if your new client no is 500 and SID(System ID) if P10 then logical system will be,