Intermec CK30

Display Data StreamChapter —6
264 TE 2000
 5250 Terminal Emulation Programmer’s Guide
Read MDT Fields
Function
The Read MDT Fields command causes the terminal to wait for the oper-
ator to press an active AID-generating key, then sends all fields that have
their MDT bit set. The bit could have been set by the operator entering
data in the field or by the WTD command.
Restrictions
The operator must press an AID-generating key to execute this command.
In addition, the CD in the RH for the requested LU must be on before
any information can be sent back to the host system in response to the
command. The command is cleared if:
S A session control request (such as Unbind) is issued by the host.
S A Clear Unit command is issued.
S The host system sends another Read command to the same LU and
overlays this command.
S The Read command is serviced.
Format
The command take the following form:
ESC Read MDT Command CC Byte 1 CC Byte 2
Hex 04 Hex 52 Hex 00 Hex 13
The format of the returned data is:
Bytes 1 and 2 Byte 3 Byte 4 Byte 5 Byte 6
Cursor address AID code {SBA Field address Field data}
Note: The {} brackets around the last three fields indicate these fields may
be repeated as a unit.
The cursor address gives the cursor location on the display. The SBA fields
are formatted as Set Buffer Address orders. The field address comes from
the address portion of the order and gives the address of the modified field
(excluding the attribute).