Connect PowerNet 3270 User manual

Connect number CNT5000-5401
Version 5.1 February 1998

Connect number CNT5000-5401
Version 5.1 February 1998
PowerNet 3270
Reference Manual

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Connect, Inc. 3270 Connectivity Overview
February 1998 iii
Table of Contents
1. 3270 Connectivity Overview
Introduction ................................................................................................1-1
Features......................................................................................................1-1
Menus.........................................................................................................1-2
Documentation............................................................................................1-2
Interface...................................................................................................... 1-3
Product Information ....................................................................................1-3
Related Documents......................................................................................1-3
2. Host Connection Setup
Introduction ................................................................................................2-1
Hardware....................................................................................................2-1
DIP Switch Configuration .......................................................................2-3
SNA Controllers ......................................................................................... 2-3
3270 Token Ring Network Menu.................................................................2-4
3270 SDLC Network Menu......................................................................... 2-4
TN3270 Network Menu .............................................................................. 2-5
3270 Token Ring Host Link Setup Form - Fields...................................... 2-7
3270 SLDC Link Setup...........................................................................2-9
3270 SDLC Host Link Setup Form - Fields ............................................. 2-9
Controller Setup Form - Fields............................................................... 2-12
Status Display Form - Fields ................................................................. 2-16
Line Trace................................................................................................. 2-16

PowerNet 3270 Reference Manual Connect, Inc.
4February 1998
3 Configuration
Introduction.................................................................................................3-1
Host List .....................................................................................................3-1
3270 Handler Setup Forms ..........................................................................3-4
Alarm Options Group ..............................................................................3-8
3270 Terminal Emulator............................................................................3-20
LU Mapping..............................................................................................3-20
4 Dialog Language Objects
Introduction.................................................................................................4-1
3270 Session Overview................................................................................4-1
Script File Format........................................................................................4-3
Script Control Commands........................................................................4-7
Parameter Control Commands..................................................................4-7
Host Session Commands..........................................................................4-7
Terminal Session Commands....................................................................4-7
Script Examples ..........................................................................................4-7
Appendix–System Generations
Sample system generations for the IBM main-frame host..............................5-1

February 1998 1-1
1. 3270 Connectivity Overview
Introduction
The PowerNet provides connectivity between 900 MHz LANs and/or Access
Point LANs and a 3270 Host, when equipped with the PowerNet 3270
Connectivity Package. Five types of 3270 connectivity packages are available,
SNA/SDLC V.24, SNA/SDLC V.35, SNA/Token Ring, TN3270/Ethernet, and
TN3270/Token Ring.
During system operation, the wireless terminals appear to the host as 3278 model
2 terminals, while the server appears as a 3274-51C cluster controller.
This PowerNet 3270 Reference Manual describes the procedures necessary to
install and support connections to the 3270 host. An SNA/SDLC environment,
using V.24 and V.35 connectivity is discussed, as well as an SNA/Token Ring
(TR) environment, using an IBM Token Ring 4/16 Network Interface Card (NIC).
Features
The PowerNet 3270 Connectivity Package offers the following:
• Easy Setup - Forms are used to enter information for system setup
and this process is completed from within the program. There are no
files to edit or command line operations to perform.
• Quick Start Operation - The Quick Start mode and its default 3270
Handler allows the ability to use the system without customization.
Scripting allows for even more efficient use with complete
customization of keystrokes, host logon/logoff procedures,
application use, and more.
• Logs and Traces - These features are available to help tune the
system during setup and also for problem resolution if a problem
occurs. Log levels may be set to collect various degrees of
information, or none, during normal operation.
• Easy Terminal Menu Modification - Add Hosts or Applications to the
RF terminal Host List Menu easily, and without editing files. Use the
PowerNet Host List option and the 3270 Handler for additions
and/or modifications to this menu.

PowerNet 3270 Reference Manual Connect, Inc.
1-2 February 1998
• Full Screen Emulator - A 3270 terminal emulator is available as a
menu selection as a convenience.
• Screen Formatter Compatible - The Screen Formatter package allows
customization of full-size host screens, to smaller RF terminal
screens. Although purchased separately, it is fully integrated with this
package in both operation and function.
• Variable PU Limit - By default, the system is set for a maximum of 4
PUs, with each PU supporting 254 LUs. The actual number of
terminals that can be supported is determined by other factors
discussed later in this document.
Menus
Modifications to the server base menus, shown in the PowerNet System Manual,
include two additions to the Operations Menu, following the Startup RF Network
selection. These additions are either SDLC Startup and SDLC Shutdown, or TR
Startup and TR Shutdown (depending on the package installed).
Documentation
Instructions for setting up host connection parameters and checking connection
status appears first. Modification of the Host List file which involves the 3270
Handler is next, followed by log examination. After these configurations are in
place, the system can be used in Quick Start mode.
Customization of the system, by using scripts to automate a variety of terminal
operations, is documented in Chapter 4. Scripts, which are created with the
custom Dialog Language, are not absolutely necessary but help streamline
operation. For example, terminal logon and logoff procedures can be added to the
script, removing them from the operator’s responsibilities. The full screen
emulator, discussed in Chapter 3, can be quite useful during script development.
Information regarding the networks/hardware in place at the installation site is
needed while reading and following the material in this manual. The host system
administrator should be able to provide this. In addition, readers may find a
background in the host network and SNA/SDLC, TCP/IP, or SNA/Token Ring
protocols to be helpful.
Conventions
This document uses the same typographical conventions as the PowerNet System
Manual.

Connect, Inc. 3270 Connectivity Overview
February 1998 1-3
Interface
Please see the PowerNet System Manual for information about the screen formats
and keys used with this software.
Product Information
Product Number Description
CNT5000-3208 3270 SNA/SDLC RS-232 Connectivity Package
CNT5000-3209 3270 SNA/SDLC V.35 Connectivity Package
CNT5000-3207 3270 SNA/Token Ring Connectivity Package
CNT5000-3502 Screen Formatter Software Package
CNT5000-3111 TN3270 Ethernet Connectivity Package
CNT5000-3112 TN3270 Token Ring Connectivity Package
Related Documents
Product Specification - PowerNet Architectural Overview
Product Specification - TCP/IP Terminal Emulation
Product Specification - SNA and TCP/IP 5250 Terminal Emulation
Product Specification - Windows/NT Application Program Interface
Product Specification - TCP/IP Client Streaming Interface
Product Specification - Screen Formatter
PowerNet Server Reference Manual
PowerNet Soft Server Reference Manual
PowerNet Client Reference Manual
PowerNet 3270 Reference Manual
PowerNet 5250 Reference Manual
PowerNet VTerm User Manual
PowerNet TCP/IP Reference Manual
PowerNet Screen Formatter Reference Manual
PowerNet Scan Editor Reference Manual

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1-4 February 1998
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February 1998 2-1
2. Host Connection Setup
Introduction
This chapter describes the procedures required to set up the communication link
between a server and a 3270 host. Since SNA/SDLC, SNA/Token Ring, and
TN3270 connectivity setup are similar, one set of instructions is given. Differences
in setups are documented. Menus are almost identical, with differences indicating
either SDLC, TR, or TN. Examples of menus are included.
If Token Ring connectivity is being implemented, one additional step must be
taken—to determine whether the TR network is operating at 4 or 16 Mbps. If it is
16 Mbps, no additional work must be performed, other than the steps listed in the
summary below. If the network is operating at 4 Mbps, a DIP switch on the Token
Ring NIC must be changed. Please see Token Ring NIC on Page 2-3 for
instructions.
If TN3270 is implemented, host connection setup must be completed prior to
setting up the TN3270 handlers. Details for this host connection setup and
configuration is covered in the TCP/IP setup manual.
The following is a summary of the link setup process:
• Shut Down Host Link - Terminate any activity between the host and
the server.
• Set Host Parameters - Complete the setup form with the parameters
obtained from the host system administrator.
• Set Up Physical Connection - Connect all hardware, connectors,
cables, etc., as required, for the link from the server to the host.
• Start Up Host Link - Activate the connection between the 3270 host
and the server.
• Verify Link - Display status screens for checking the communication
path between the server and the 3270 host.
Hardware
System administrator’s or the end users’ services are responsible for all equipment
and cabling external to the SDLC board, Token Ring NIC, or Ethernet connection,

PowerNet 3270 Reference Manual Connect, Inc.
2-2 February 1998
which can include synchronous modems, modem eliminators, modem sharing
units, MAU cables, HUBs, etc. All necessary equipment and configuration in each
of these environments is specific to the host and site requirements for each
installation. Therefore, the hardware connections for each site must be made on an
individual basis, and only general information is given here.
SDLC Communications Board
Each SNA/SDLC communications board has two, high density D-sub-miniature
female port connectors. The cables have a DB-15 male connector on the board end
and a DB-25 male connector on the peripheral end. Pinouts for each connector are
as follows:
Caution The connectors on the SDLC board appear exactly like a VGA monitor
connection or a multiport concentrator connection. Do not plug any devices
other than the SDLC adapter cable into this board.
DB-15 Pin Number Assignment
1Not Connected
2Transmitted Data (TXD) Output
3Received Data (RXD) Input
4Request To Send (RTS) Output
5Clear To Send (CTS) Input
6Data Set Ready (DSR) Input
7Signal Ground
8Data Carrier Detect (DCD) Input
12 Receive Clock (RXC) Input
13 Transmit Clock (TXC) Output
14 Transmit Clock (TXC) Input
15 Data Terminal Ready (DTR) Output
DB-25 Pin NumberAssignment
1Not Connected
2Transmitted Data (TXD) Output
3Received Data (RXD) Input
4Request To Send (RTS) Output
5Clear To Send (CTS) Input
6Data Set Ready (DSR) Input
7Signal Ground
8Data Carrier Detect (DCD) Input
17 Receive Clock (RXC) Input
24 Transmit Clock (TXC) Output
DB-25 Pin NumberAssignment
15 Transmit Clock (TXC) Input
20 Data Terminal Ready (DTR) Output

Connect, Inc. Host Connection Setup
February 1998 2-3
The board is set for external clocking, which requires a modem or modem
eliminator between the server and the Host Front End Processor (FEP) or other
communications equipment.
Token Ring NIC
Each standard IBM Token Ring 4/16 NIC (Network Interface Card) provides one
DB-9 female connector. The cables that connect from the server to the Multi-
station Access Unit (MAU) for the Token Ring are customer provided. To change
the operating data rate for the card, from 16 to 4 Mbps, follow the instructions
below.
DIP Switch Configuration
To gain access to the DIP switches on the TR NIC, the server cover must be
removed and then the NIC removed from its card slot. A diagram of the DIP
switch block on the card is shown in Figure 2-1.
2
1
Off is in the up position. Example, switch 1 is in the off position. You must change the position of switch 12.
u
t
p
s
t
p1 2 3 4 5 6 7 8 9 10 11 12
16
4
16 bit
Figure 2-1 IBM 4/16 Token Ring NIC Dip Switches
DIP switch #12 must be changed. It is factory-set in the up (off) position which is
16 Mbps operation. It must be reset in the down (on) position for 4 Mbps
operation. Do not change any of the other DIP switches. Next, reconnect the card
to the same card slot from which it was removed, then replace the PowerNet server
cover.
For newer IBM cards, find detailed information at the IBM web site:
http://www.networking.ibm.com/nes/nestoken.htm#triau
SNA Controllers
The SNA/SDLC and SNA/Token Ring servers are configured for at least one line
on the installed communications board or NIC. The default maximum of sixteen
controllers can be configured for each SNA/SDLC V.35 or V.24 interface and four
for each Token Ring interface. Each controller, as defined by the SNA protocol,
supports up to 254 logical units (LUs). Each terminal must be assigned a logical
unit and therefore, the maximum number of terminals is 254 per configured
controller.

PowerNet 3270 Reference Manual Connect, Inc.
2-4 February 1998
Caution The actual number of terminal supported is determined by many
factors and is discussed later.
3270 Token Ring Network Menu
The 3270 Token Ring Network option provides access to the setup screen and various
other 3270 connectivity options that are summarized below. Select 3270 Token Ring
Network from the Main Menu and the menu shown in Figure 2-2 is displayed.
Token Ring
*1 Setup
2 LU Mapping
3 Status
4 Line Trace
5 Emulator
Figure 2-2 3270 Token Ring Network Menu
3270 SDLC Network Menu
The 3270 SDLC Network option provides access to the setup screen and various other
3270 connectivity options that are summarized below. Select 3270 SDLC Network
from the Main Menu and the menu shown in Figure 2-3 is displayed.
3270 SDLC
*1 Links
2 Controllers
3 LU Mapping
4 Status
5 Line Trace
6 Adapter Test
7 Driver Test
8 Emulator
Figure 2-3 3270 SDLC Network Menu
Menu Options
Menu options affecting the available 3270 setup menus (Token Ring and SDLC) shown
above are described here. The functionality of the menu items are similar and the
applicability of each menu option is indicated.
Setup —This option provides for host session addressing.

Connect, Inc. Host Connection Setup
February 1998 2-5
Links (3270 SDLC and Token Ring)—This option displays a form where host link
parameters are specified. The Host System Administrator must supply
configuration information which is then entered on this form.
Controllers (3270 SDLC and Token Ring)—This menu option allows the system
administrator to configure the 3270 Controller parameters.
LU Mapping (3270 SDLC and Token Ring)—The PowerNet server assigns each RF
terminal a default SNA PU and LU automatically. This option may be used to
change these default LU assignments which are in sequential order. The
mapping begins with terminal #065 assigned to LU 2, #066 to LU 3, etc.
Status (3270 SDLC and Token Ring)—This displays the status of PU(s) and LUs.
Line Trace (3270 SDLC and Token Ring)—Use this option to examine the host link
data that was collected with the Line Trace Facility. The Line Trace Facility
can be activated with this option and is used to collect a full display of link
exchanges. The Line Trace Facility should be turned on prior to starting the
host connection and should only be used while testing the initial installation.
Remember to turn the Line Trace Facility off after the link is tested and
verified as operational. To turn off this facility, the SDLC/Token Ring
Shutdown must be selected from the Operations Menu. Next, the TRACE
option on the Host Connection Setup Form must be toggled to OFF. The link
is then restarted (see SDLC/TR Startup).
Adapter Test (3270 SDLC only)—Use this option to test the SDLC host link adapter.
This test is useful to ensure that the SDLC adapter is functioning internally
with the PowerNet server software.
Driver Test (3270 SDLC only)—Use this option to test the SDLC host link adapter
driver software. This test is useful to ensure that the SDLC driver is
functioning internally with the PowerNet server software.
Emulator (3270 SDLC and Token Ring)—Full screen 3270 emulation is provided
with this option. The emulator is useful for testing scripts and capturing host
screens to a file which can be used by the Screen Formatter.
TN3270 Network Menu
The TN3270 Network option provides access to the setup screen and emulator
options that are summarized below. Select TN3270 Network from the Main Menu
and the menu shown in Figure 2-4 is displayed. Specific TCP/IP setup options for
the TCP/IP portion of the system are described in the TCP/IP system manual.

PowerNet 3270 Reference Manual Connect, Inc.
2-6 February 1998
TN3270
*1 Setup
2 Emulator
Figure 2-4 TN3270 Network Menu
Setup—This option provides for host session addressing, provided that the
TCP/IP setup has been completed.
Emulator—Full screen 3270 emulation is provided with this option. The
emulator is useful for testing scripts and capturing host screens to a
file which can be used by the Screen Formatter.
SNA Shutdown
Before setting up the link, select the SNA Shutdown option from the Operations
Menu and then press <Enter>. This terminates any link to the 3270 host. First, a
prompt for a confirmation of the shut down action appears on the screen, followed
by a list of events as they occur. An SDLC example is shown below.
Are you sure that you want to shut down the link to the SDLC
Network? (y/n)
Press <y>.
SDLC Shutdown
Status check ...
Terminal check ...
Deactivating SDLC Line and Station
Terminal check ...
Press <Enter> to continue
Press <Enter> and the Operations Menu reappears.
After all possible activity is terminated, the setup parameters for the link to the
host can be entered.
Link Setup - Token Ring
Select Setup from the 3270 Token Ring Menu to display the Setup Form shown in
Figures 2-5. Connection information, supplied by the Host System Administrator,
is entered on this form.
The Token Ring link setup form is discussed here. Form fields are explained
following each figure. The type of field (toggle, text, or display) is also listed.

Connect, Inc. Host Connection Setup
February 1998 2-7
3270 Token Ring Link Setup
SNA Token Ring 3270 Setup
Local MAC Address [000000000000]
SSAP/DSAP [04]
Host
State [off]
MAC Address [000000000000]
XID [00000000]
Controller Start [TEST+XID]
Session Start [TEST+XID]
Session End [NOTIFY+UNBIND]
XID Format [1]
MAX Frame size [1950]
Window Size [20]
T1 Timer [3 ]
LU Sessions [32 ]
<ESC>=QUIT <ARROWS>=MOVE
Figure 2-5 3270 Token Ring Host Link Setup Form
3270 Token Ring Host Link Setup Form - Fields
Fields for up to four 3270 Host connections are provided with the Token Ring
Setup Form. If only one is being implemented, use the Host 0 column.
Local MAC Address [Text Field] The media-access control (MAC) address
used by the PowerNet server is its physical address, normally set by
the manufacturer on the token ring NIC. If the address is not found on
the card or the card is not properly initialized, NOT FOUND appears
in the field. Certain hosts may specify an address that must be used
regardless of the physical address. If so, enter the address thus
overwriting the existing one. The software token ring driver uses the
address supplied in this field. If this field is left to all zeros, the NIC
card manufacturer’s MAC address is used.
SSAP/DSAP [Toggle Field] Source Service Access Point/Destination Service
Access Point contains the hex address values set to 04.
State [Toggle Field] The line may be set to either ON, or OFF.
MAC Address [Text Field] The host media-access control (MAC) address, is
entered in this field. It should be obtained from the System
Administrator.
XID [Text Field] The server Exchange Identification (XID), provided by the
administrator, is entered in this field. In mainframe environments, the
server XID is derived from the Switched Major Node definitions for
IDBLK and IDNUM. The IDBLK value is 3 hexadecimal digits that

PowerNet 3270 Reference Manual Connect, Inc.
2-8 February 1998
form the leading digits of the XID, and the IDNUM parameter is 5
hexadecimal digits that form the trailing digits of the XID.
Controller Start [Toggle Field] The Controller Start field has four selections
that can be used for controller route binding to the host. These are
TEST, XID, TEST+XID, and PASSIVE. All initialization options cause
the server to generate Data Link Control (DLC) frames of varying
types. The default initialization option, TEST+XID, generates Test and
XID format 0 frames for this process. The XID option generates XID
format zero frames.
Session Start [Toggle Field] The Session Start field has five selections that
can be used for session route discovery to the host. These are NONE,
TEST+XID, XID+SABM, XID1, and XID3. All initialization options
cause the server to generate Data Link Control (DLC) frames of
varying types. The default initialization option, TEST+XID, generates
Test and XID format 0 frames for this process. The XID option
generates XID format zero frames, and XID-FMT1 generates XID
format 1 frames. The XID-SABM option generates XID format 0
frames and SABM frames.
Session End Protocol [Toggle Field] The Session End Protocol Option
determines the method used to end a 3270 session. The selections are
NOTIFY+UNBIND, TERMSELF, LUSTAT, LUSTAT+DRI,and NOTIFY.
The default is NOTIFY+UNBIND and can be used with the majority of
mainframe hosts. Selections used here depend upon the host.
Max Frame Size [Toggle Field] The Max Data field is used to set the
maximum size of the data blocks sent from the host system. The
default value for this field is 265. This value is supplied by the host
system administrator and must match the value as set on the host.
Toggle values for this field are 261, 265, 517, 521, 1029, 1033, 2052,
or 2057.
Window Size [Text Field] The window size field corresponds to the host
setup field option of the same name. It controls the number of frames
that can be transmitted before an acknowledgment is required. If this
value does not match the host value, data frames may be missed,
sessions may hang, and/or session drops may occur.
T1 Timer [Text Field] The T1 Timer field specifies the amount of time to
wait for a response to transmitted commands or data before requesting
re-transmission. Normal setting of the T1Timer should be set in the
range of 1 to 3 seconds. A setting above 3 seconds may result in
noticeable delays to responses that must be retransmitted (typically
than 3% of the frames).