From the management board CLI you can use the following command to log into the CLI of individual FPCs:
execute load-balance slot manage <slot-number>
<slot> is the slot number of the component that you want to log in to. The management board is in slot 0 and the FPC slot numbers start at 1.
When connected to the CLI of a FPC, you can view information about the status or configuration of the FPC, restart the FPC, or perform other operations. You should not change the configuration of individual FPCs because this can cause configuration synchronization errors.