This parameter contains the operator ID (OID) card value that is present on the logon panel. You can change the operator ID card value using this parameter. The maximum length of this field is one byte. The only allowable values are the character 'S' and ' '. If the field is ' ', the user is not prompted to enter the data using the Operator ID Card Facility. If the field is 'S', the user is prompted to enter the data using the Operator ID Card Facility.