It is not possible to change Primary or Secondary Reader Formats as they are greyed out.
If the Reader Expander Port Network Type is set to Schneider Electric RS485 the option to change the format on that Expander Reader 1 or Reader 2 Tab is edit locked.
Under the General Tab change the Port 1 Network Type to Wiegand
Under the Reader 1 Tab the Reader's Primary and Secondary Formats can now be changed
Repeat process for Reader Expander Port 2 Network Type and Reader 2 Primary and Secondary Formats as required.
Remember under the General tab to change the Network Port Types back to Schneider Electric RS485 before saving.