JCM Part No . 960 - 000053R _ Rev . 6 © 2007, JCM - American Corporation 6 - 2 1 Programming and Testing AD - 02™ Retrievable Bill Validator Section 6 Command/Response Protocol C OMMAND /R ESPONSE L IST Table 6 - 9 lists the Name and Function for each Command Code . See Figure 6 - 57 ‘AD - 02 Normal State Command/ Response Sequence Flow Diagram ’ on page 6 - 25 . C OMMAND F ORMAT Table 6 - 10 lists the command format bit code structure . The code bit positions are defined as follows: •   Bit 1 — Command Code: 1 Byte Specified depending on the processing request . •   Bits 2 - 6 — Time Data: 5 Bytes Year/Month/Day/Hour/Minute data Since this data area is not used in this specification, these bytes can be filled with any appropriate user data . •   Bit 7 — Command Text Data: X Bytes Used to set each command parameter . The length (X) of the text is defined for each command . R ESPONSE F ORMAT Table 6 - 11 lists the response format bit code structure . The code bit positions are defined as follows: •   Bit 1 — Response Code: 1 Byte Same as the received command . •   Bit 2 — Response Parameter: 1 Byte When the machine sends a response without executing the processing specified by the received command, and of the bits listed in Table 6 - 12 will be sent to “Response Code Bit 1” . In this case response text data will not be added . •   Bits 3, 4 & 5 — Machine Status: 3 Bytes Indicates machine status . Normally, only one of the bits is set to “1” . However, if a program error is detected when the power is turned ON, both the “Power - ON” and “Waiting for Download” bits are set, and the machine enters into a compulsorily download mode . –   Machine Status 1 is defined in Table 6 - 13 . –   Machine Status 2 is defined in Table 6 - 14 . Table 6 - 9 Command and Response Code Listing Command Code (Hex) Command Name Command Function (Outline) 30 (H) Reset Initializes the machine 52 (H) Status 3 Requests machine status information during a download 90 (H) Download Request Requests a download start 91 (H) Download Data Transfers and writes downloaded data 92 (H) Download End Notifies a download termination . Table 6 - 10 Command Format Listing Bit Command Code 1 Command Code 2 Time Data — Year 3 Time Data — Month 4 Time Data — Day 5 Time Data — Hour 6 Time Data — Minute 7 — Command text data . Table 6 - 11 Response Format Listing Bit Command Code 1 Response Code 2 Response Parameter 3 Machine Status 1 4 Machine Status 2 5 Machine Status 3 6 Bill Storage Condition 1 7 Bill Storage Condition 2 8 Error code 9 — Response text data . Table 6 - 12 Response Parameter Descriptions Bit Name Description 0 Command Error When an undefined command is received 1 Command Parameter Error When the command parameter setting is invalid 2 Command Execution Disabled When an un - executable command in the current machine status is received 3 to 7 Zero - Fixed N/A . Table 6 - 13 Machine Status 1 Code Bit Definitions Bit Name Function 0 Power - ON From the moment power is turned ON until a reset command is executed 1 Resetting Active during a reset operation 2 Standby Power ON Standby 3 to 7 Zero - Fixed N/A . Table 6 - 14 Machine Status 2 Code Bit Definitions Bit Name Function 0 On Alarm When issuing an alarm 1 to 3 Fixed to Zero (0) None 4 Waiting for Download Waiting to receive download data 5 Write Download Data Writing Download Data Table 6 - 11 Response Format