CLUSTER "acro The general polling characters for the remote 3270 device Cdv) are
always X'7F' and the general polling characters for the control
unit are defined when the control unit is physically installed. Use Figure 17 to determine what you should code as the general
polling characters for the control unit. GPOLL is ignored if CUTYPE=3275 and DIAL=YES are specified. The 3274 and 3276 terminals have control unit address
switches which are set by the user to match the polling and
selection address characters shown in Figure 17.
LINE=cuu
is the line interface address. It is the address specified on the RDEVICE macro that is associated with this CLUSTER macro. specifies whether the 3275 has the Dial feature.
specified if CUTYPE=3271. DIAL=NO must be
The following CLUSTER macro describes a 3271, 3274, or 3276 control unit
with a control unit address of 2 and a line address of 078. CLUST001 CLUSTER CUTYPE=3271,GPOLL=C27F,LINE=078,DIAL=NO The following CLUSTER macro describes a 3275 display station (without
the Dial feature) that has a control unit address of 0 and a line
address of 080. CLUST020 CLUSTER CUTYPE=3275,GPOLL=407F,LINE=080,DIAL=NO In the real 1/0 configuration file (DKKRIO), the CLUSTER macro must
immediately precede the TERKINAL macros that define the stations
attached to that cluster or standalone station.
136 IBK VK/370 Planning and System Generation Guide
TERMIN AL l!acro TERMINAL Macro Use the TERMINAL macro to define (1) a display station or printer that
is attached to the remote 3270 display system or (2) a terminal address
that is available to attach an additional remote 3270. Each terminal
address attached to a cluster must be represented by a TERMINAL macro. Only one TERMINAL macro is specified for a standalone 3275 display
station.
Code one TERMINAL macro for each display device and each printer
attached to a cluster control unit (3271 or 3276) You must code a
TERMINAL macro for every terminal address to which a terminal can be
attached, even if a terminal address is unused. When you code a
TERMINAL macro for an unused terminal address, specify a valid TERl!= operand and the correct selection or addressing characters.
For a 3274 Model lC Control Unit that has 3277s, 3284s, 3286s, 3287s
(attached via Terminal Adapter Types Bl, B2, B3, or B4), or 3288s
attached, first you must code a TERMINAL macro for all 3278s, 3287s, and
3289s in groups of 8 until all 3278s, 3287s, and 3289s have been
included. You must code a TERMINAL macro for every terminal address in
each group of 8. Then, following these macros, you must code a TERMINAL
macro for each 3277, 3284, 3286, 3287, or 3288. Again, you must code a
TERMINAL macro for every terminal address to which a terminal can be
attached.
Code only one TERMINAL macro to define the display station,
optionally a printer, attached to a standalone station (3275).
TERM=3275 to define the 3275 display station and, optionally, MODEL=3 to define a 3284 or 3286 printer attached to the 3275.
and
Code
code All the TERMINAL macros defining the devices attached to a remote 3270 station must follow the CLUSTER macro that defines the control unit
for that station. The groups of CLUSTER and macros must
precede all other macros in the Dl!KRIO file.
The format of the TERMINAL macro is:
r I Name Operation Operands I I TERMINAL I TERM=r
75
!
I I 3277 I I 3284 I I 3286 I I 3288 I I 1 I , SEL ECT=cudv I I I I r , I , " MODEL=ll , I , , MODEL=3, , , L .J I I I I [ , FEATURE=OPRDR] L Part 2. Defining Your Vl!/370 System 137
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