Table 3-6. Initial Request Mailbox Message .................................................................................................3-9 Table 3-7. Initial Request Mailbox Message, With Text Buffer .................................................................3-10 Table 3-8. Bits of the PLC Status Word ......................................................................................................3-12 Table 3-9. Completion ACKnowledge Mailbox Message...........................................................................3-13 Table 3-10. Completion ACKnowledge Mailbox Message, With Text Buffer ...........................................3-14 Table 3-11. Error Nack Mailbox Message (D1h) Format...........................................................................3-15 Table 3-12. Major Error Status Codes .........................................................................................................3-16 Table 3-13. Minor Error Status Codes: General ..........................................................................................3-16 Table 3-13. Minor Error Status Codes: General - continued .......................................................................3-17 Table 3-13. Minor Error Status Codes: General - continued .......................................................................3-18 Table 3-14. Minor Error Status Codes: Program Load and Store Requests ................................................3-18 Table 3-15. Text Buffer Message Format....................................................................................................3-19 Table 3-16. Block Transfer Message Format ..............................................................................................3-20 Table 3-17. Connection Data Message Format.......................................................