Moxa MD-224X [48/56] Examples

MD-224 Hardware Manual Display UART Commands

C-4

DL? (ECDIS RGB Package Query)

Use DL? to determine how many available packets are in each ECDIS table. This command cannot be used if

the MD-224 has not been calibrated. Total package num = Size of ECDIS RGB file/30 bytes per package.

Examples:

Send DL? command to query total package num. of the first RGB file.

0x07 0xFF 0x44 0x4C 0x3F 0x00 0x2A

ACK 255 packages

0x06 0xFF 0x44 0x4C 0x3F 0x01 0x2A 0xFF 0x00

D2N (Download ECDIS RGB Package (Second))

Before sending this command, use DL? to determine how many available packets are in each ECDIS table. like

"DL?" command, if we at ‘Calibration VGA’ mode the ACK is data in VGA table, and also at DVI mode. We can

not use this command at ‘No Calibration’. Every packet has a head (Byte 7 and Byte 8), Byte 7 is this packet

number and Byte 8 is the ASCII code for “-”; the remaining bytes are data (without last byte, it is checksum for

data. If packet is full the data is Byte 9 to Byte 38). LEN=one date byte

Data length is 32. The first byte is package num., the second byte is “-” and the other 30 bytes are data.

Examples:

Command to read package 0.

0x07 0xFF 0x44 0x32 0x4E 0x01 0x34 0x00 0xFF

ACK package 0 of the first RGB file

0x06 0xFF 0x44 0x32 0x4E 0x20 0x16 0x00 0x2D Data IDCHK

D2? (ECDIS RGB Package Query (Second))

Every package has 32 bytes of data; the first byte is the package num, the second byte is “-” and the other 30

bytes are data

Examples:

Send a D2? command to query the total package num. of the first RGB file.

0x07 0xFF 0x44 0x32 0x3F 0x00 0x44

ACK 255 packages

0x06 0xFF 0x44 0x32 0x3F 0x01 0x44 0xFF 0x00

ETC (Elapsed Time Counter Query)

This command queries the elapsed time that the unit has been operating. No data will be sent with this

command. The unit will reply to this command with an ACK attention code. The DATA field will be set to a 4 byte

string, where the first byte is Year, the second and third are Hour and the forth is Minute.

Examples:

Send ETC to query elapsed time:

0x07 0xFF 0x45 0x54 0x43 0x00 0x1D

ACK Year, Hour, Minute

06 FF 45 54 43 04 1A Year Hour(H) Hour(L) Minute IDCHK