Hi,
As explain by Grigoriy i presume you have define your LC's
How to set the loan limits and sublimits
Create product type with reference to 55A and control the posting for the same through flow type.
In flow type Unchecked all the option apart from CM.
Assign your product for cash and liquidity in planning level to Capture the same in FF7A.
Letter of credit transaction update for cash management
Hope this help.
Regards,
Jain