AM3270 Management Programming Manual

COMMANDS AND RESPONSES
ALTER Command
Each attribute is defined in a separate field. At least one
field must be specified. The fields are as follows:
ZADDR A pair of integers that specifies the address to
be assigned to the subdevice. The first integer
is the address of the control unit. The second
integer is the address of the subdevice. Both
integers should be in the range 0 through 31.
ZPROTO An enumerated value that specifies the protocol to
be used by the subdevice. There is no default
value. You can assign one of the following values:
ZAM3-VAL-PROTO-CRT The CRT protocol will be
used.
ZAM3-VAL-PROTO-PTR The printer (PTR) protocol
will be used.
ZAM3-VAL-PROTO-PTP The pass-through protocol
(PTP) will be used.
ZAM3-VAL-PROTO-ITI The interactive terminal
interface (ITI) protocol
will be used.
ZAM3-VAL-PROTO-QUO The QUOTRON (QUO) protocol
will be used.
ZRECSIZE An integer that specifies the maximum number of
bytes the subdevice can send or receive in a
record. The recommended record size depends on the
protocol used and the type of subdevice as follows:
ITI terminal Use the number of columns
(40 or 80) as the record size.
CRT terminal Use the defined screen size as
the record size.
PTP subdevice Use the defined screen size as
follows:
Screen Size Record Size
480 512
960 1024
1920 2048
2560 3072
3440 4095
Printer Use the printer line length as
the record size.
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