Siemens SIMATIC TIWAY 1 User manual

SIMA TIC TIW A Y 1
UNILINK Host Adapter
User Manual
Order Number: PPX:TIWAY–8121–2
Manual Assembly Number: 2587871–0045
Second Edition

UNILINK HOST ADAPTER1–1
USER MANUAL
CHAPTER 1
THE UNILINK HOST ADAPTER
1.1 INTRODUCTION
The UNILINK Host Adapter , Figure 1–1 is a second generation host computer
interface product that allows a host computer to operate and control secondary
devices on a TIW A Y I network. The UNILINK Host Adapter , also referred to as
the “adapter” in this manual, is a hardware and software extension of the
original TIW A Y I Host Adapter .
Figure 1–1 UNILINK Host Adapter

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USER MANUAL
1.2 FEATURES
The hardware is composed of the UNILINK Adapter , shown in Figure 1–1, with
a plug-in Personality Interface Module (PIM) PPX:500–6224. The PIM, shown
in Figure 1–2, contains the software that causes the UNILINK Adapter to
operate as the UNILINK Host Adapter .
Figure 1–2 Personality Interface Module (PIM)
Figure 1–3 illustrates the basic structure of the UNILINK Host Adapter. The
corresponding physical features are shown in Figure 1–4. It includes an
RS–232–C/RS–423–A compatible host port that supports the Non-Intelligent
Terminal Protocol (NITP) used by the original TIWAY I Host Adapter, or the
BDLC
protocol, an advanced, byte-oriented subset of the HDLC protocol. Also,
there are two TIW A Y I interface ports and an external I/O point block.

THE UNILINK HOST ADAPTER
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USER MANUAL
Host
Computer
RS–232–C/RS–423A
Host
Interface
(Command Processor)
TIWA Y I
Interface External
Input Point Output Point
TIWA Y I
Network
Secondaries
UniLink
Host Adapter
Figure 1–3 UNILINK Host Adapter Block Diagram
Port
1Port 2Port 3Port 4AC NEUT AC LINE
GND
1 2 3 4 5
I/O
Host Computer Port Power Connections
TIWA Y I Ports External I/O Points
PPX:500–711 1, Dual Local Line media ports shown here.
Figure 1–4 UNILINK Host Adapter Physical Features

THE UNILINK HOST ADAPTER
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USER MANUAL
The features of the UNILINK Host Adapter include:
 The adapter is noise hardened for factory floor use.
There are internal diagnostics tests to check the internal operation
when powered-up or reset, and during normal operation. There is also a
selectable test mode that is set locally .
The adapter can be reset locally with an internal switch or remotely
with a host issued command.
The adapter supports secondary-to-secondary communications without
complex host software or additional hardware.
The adapter is backward compatible with TIWAY I Host Adapter
software and drivers.
The adapter includes an independent host communications port
capable of serial communications at 38.4K baud. This port operates
simultaneously with the network ports.
This host port provides an optional advanced host protocol for improved
throughput and data integrity. This protocol also allows up to 32
UNILINK Host Adapters to be multidropped (via a modem) from the
same host computer RS–232–C/RS–423–A port.
 The adapter supports or provides the following TIW A Y I features.
The adapter supports the TIW A Y I redundant media feature, providing
fault tolerant communications in case of a media failure.
The adapter supports communication with multiple network secondary
devices concurrently for higher network throughput.
The adapter supports concurrent network request processing. The host
computer does not have to wait for a request to complete before issuing
another request when using the advanced host communication
protocol.
Commands are provided for background data collection. The adapter
can be configured to collect data for the host computer by storing the
most current data values in internal memory. Another command then
retrieves
the data.

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USER MANUAL
The adapter is configurable for a variety of applications needs and
includes multiple host computer support, allowing several host
computers to communicate with the secondary devices on the same
TIWAY I network.
The adapter provides transaction statistics collection to aid network
performance
tuning.
1.3 TYPICAL NETWORK APPLICATIONS
Figure 1–5 illustrates a typical single host network managing a process control
application. The host computer application directs the secondary devices
through the UNILINK Host Adapter and the TIW A Y I network. Commands are
provided for downloading or uploading data from the host computer to the
secondary
devices and for checking the status of an individual device.
Host
Computer
UNILINK
TIWAY I
UniLink Host Adapter ( MHU)
RS–232–C/RS–423–A
Host Interface Cable
Figure 1–5 Single Host Network

THE UNILINK HOST ADAPTER
UNILINK HOST ADAPTER 1–6
USER MANUAL
The flexibility of the UNILINK Host Adapter also provides for multiple hosts as
illustrated in Figure 1–6. In addition to the process control application, your
main plant system can link to the same network to track work-in-progress,
adjust schedule loads for peak efficiency , and collect product cost data. W ith an
additional UNILINK Host Adapter, you can also add a personal computer
workstation to the network for statistical quality control or other uses.
Host
Computer
UNILINK
UniLink Host
Adapter (MHU)
Host
Computer
UNILINK
UniLink Host
Adapter (MHU)
Figure 1–6 Multiple Host Network

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USER MANUAL
1.4 TIWA Y I SYSTEM CHARACTERISTICS
TIW A Y I is a bus structure Local Area Network (LAN) designed for industrial
environments. The TIWAY I network connects a series of Texas Instruments
Programmable Controllers (P/Cs) and other devices to one or more host
computers. W ith the network, you can obtain, modify or replace data stored in
any of the following Siemens products:
SIMATICTI520/SIMATICTI530/
SIMATICTI520C/SIMATICTI530C P/Cs
SIMATICTI560/SIMATICTI565 P/Cs
 PM550/PM550C P/Cs
 5TI, Series 102, 103 P/Cs
IT–111, IT–121, IT–121A, IT150, and IT–160 Intelligent Tank
Transmitters (ITT s)
The P/Cs are connected to a TIWAY I network through Network Interface
Modules (NIMs). The PM550 P/C can also be connected with a Computer
Interface Module (CIM), but it limits the configuration choices. The UNILINK
Secondary Adapter is a TIW A Y I interface device that allows other devices, such
as the following, to be connected to a TIW A Y I network.
Robots
 Computer numerical controlled machines
Non-SIMA TIC programmable controllers
 Intelligent instruments
 Computer equipment
TIWAY I gateways are also available for connecting the Fisher, Foxboro, and
Honeywell networks to TIWAY I. However, you cannot use a gateway and a
UNILINK
Host Adapter in the same TIW A Y I network. TIW A Y I is designed to
satisfy today’s factory requirements for acquiring data and controlling
manufacturing processes. It is a noise-hardened serial binary communications
network that uses an advanced data link protocol.
Series 500 controllers can be connected with PEERLINKfor high speed
transfer of small amounts of data between controllers. The PEERLINK is a
solution for applications where one or more Series 500 controllers are
dependent
on high speed transfer of data from another Series 500 controller .

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USER MANUAL
With appropriate host software, an operator can program, monitor , and control
any P/C or other intelligent device on the TIWAY I network from a single
location.
The importance of the UNILINK Host Adapter is that it provides a
communication link between the TIWAY I network and one or more host
computers. Figure 1–7 is a diagram representing the various host computers
that can be connected to a UNILINK Host Adapter , and the typical devices that
can be controlled in a TIW A Y I network.
PC/
XT/
AT
ICC 6000
CVU5000
IBM
DEC
DEC
TIPC PDP–
11
UniLink
Host
Adapter
Y
/
X
S
E
R
T
E
S
1
IBM
Other
M
I
H
I
S
/
M
I
C
R
O
S
NIM
5TI
NIM
SIMATIC
TI520
NIM
SIMATIC
TI560
NIM
SIMATIC
TI565
TIWA
Y I
NIM
PM550
NIM
SIMATIC
TI530/
TI530C
NIM
Int.
Tank
Xmtr.
PEERLINK PEERLINK PEERLINK PEERLINK
Gateways
Fisher
Honeywell
Foxboro
Others
Map
Secondary
Adapter
Robots
CNC
Int. Scales
Other
Int. Devices
PC/
XT/
AT
Figure 1–7 TIWAY I Network
You cannot use a UNILINK Host Adapter in a TIWAY I network that also
contains a TIW A Y I Gateway or Network Control Module (NCM) or a TIW AY I
Host Adapter. Chapter 4 provides information on interfacing the adapter to a
TIWAY
I network.

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USER MANUAL
1.5 INSTALLATION
Instructions for installing the UNILINK Adapter and the UNILINK Host
Adapter PIM are given in the UNILINK Adapter Installation and Operation
Manual (PPX:TIWAY–8106). It provides the electrical and mechanical
installation instructions and guidelines for the the UNILINK Host Adapter .
Chapter 2 discusses the different operational modes and how they are
configured.
Chapter
3 discusses the host computer interface port, Port 3, and how to set the
dipswitches to establish communications.
Chapter 4 discusses the TIW A Y I interface ports, Ports 1 and 2, and how setup
your network.
1.6 TECHNICAL ASSIST ANCE
If you need assistance with the installation an operation of this equipment,
contact
your Siemens Industrial Automation, Inc. distributor or sales agent. If
you need assistance in contacting your distributor or sales office in the United
States, call 800–964–41 14.
1.7 CUSTOMER SER VICE CENTER
If you need assistance in placing an order, returning a product, or learning
about product availability, contact your Siemens Industrial Automation, Inc.
distributor or sales agent. If you need assistance in contacting your distributor
or sales office in the United States, call 800–964–41 14.

UNILINK HOST ADAPTER2–1
USER MANUAL
CHAPTER 2
OPERA TION AND APPLICA TION
2.1 INTRODUCTION
This chapter provides an introduction to the UNILINK Host Adapter operation
and how it can be used in typical applications. Y ou should refer to Chapter 5 for
the complete command syntax and to the Glossary for help with any unfamiliar
terms. Network planning forms are located in Appendix E, Appendix F, and
Appendix G.
2.2 COMMAND PROCESSING
The UNILINK Host Adapter commands are a set of functional tools to help you
direct network applications. Each command consists of a one-byte command
code and one or more parameters as shown in Figure 2–1. Most parameters
have
default values that were selected to help you quickly install an operational
network and expand it with minimal software changes. As your network grows,
you can improve network efficiency by redefining the parameters to match your
network needs. Figure 2–2 illustrates the relative performance and flexibility
gained with using additional commands.
Command
Code Parameter #1 Parameter #2 Parameter #n
Figure 2–1 Command String Structure

OPERATION AND APPLICATION
UNILINK HOST ADAPTER 2–2
USER MANUAL
Performance
and
Applications
Flexibility
Basic HIU
Commands
Mode Independent
Commands
Configure Adapter
Commands
Extended HIU
Commands
Network
Manager
Commands
   
NUMBER OF COMMANDS
Figure 2–2 Performance vs Commands
Communications between the host computer and the UNILINK Host Adapter
are a series of commands and responses as illustrated in Figure 2–3. For every
command sent, there will be a response. The response will be one of the
following.
An acknowledgment that the command was received
 A command response
 The ERROR RESPONSE

OPERATION AND APPLICATION
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USER MANUAL
Host
Computer UNILINK Host Adapter
Commands
Responses
Secondary
Secondary
Figure 2–3 Host Computer To UNILINK Host Adapter
Communications
Commands are checked for errors before they are executed. The ERROR
RESPONSE is a special response that returns a code indicating the type of
error. If an error is found, the command will not be executed and the ERROR
RESPONSE
will be returned. The ERROR RESPONSE will also be returned if a
network request does not complete within the host command timeout. The
possible error codes that may be returned in the ERROR RESPONSE and
corrective actions to take are listed in Chapter 6.

OPERATION AND APPLICATION
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USER MANUAL
2.3 FUNCTIONAL ORGANIZATION AND OPERATING MODES
The UNILINK Host Adapter is organized into two primary functions; the Host
Interface Unit (HIU) function and the Network Manager (NM) function. An
adapter can be configured with one of these functions or they can be combined to
form a Master Host Interface Unit (MHIU). The MHIU, HIU, and NM are three
of the six configurable operating modes.
In addition to the above modes, there are two Emulate Host Adapter (EHA)
modes and a Standalone Network Manager (SANM) mode.
2.3.1 Host Inter face Unit Function
The primary purpose of the Host Interface Unit (HIU) function is to establish
communications between the host computer and the secondary devices on a
TIWAY I network. The HIU uses the memory in the adapter for macro buffers
and to store host-to-secondary statistics as shown in Figure 2–4. Macro buffers
are used to store macro commands and responses. Macros provide a method for
connecting, disconnecting, or sending a Primitive to a secondary device without
delays in host processing. Macros are discussed further in Paragraph 2.10.1.
Commands are received from the host computer and checked for validity . Then
the host requests are processed and queued to the Network Manager function
for routing to the appropriate secondary device. The Master Host Interface Unit
(MHIU) mode combines the HIU function and the Network Manager function.

OPERATION AND APPLICATION
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USER MANUAL
HIU
Establishes communications
Uses memory for:
Macro Buffers
between the host computer
and the secondary devices.
(Dynamically allocated)
Host–to–Secondary Statistics
Figure 2–4 Host Interface Unit Function
Part of the statistics memory area is used for a Secondary Log. As commands are
issued to connect and disconnect secondaries, the specified secondary address is
added or deleted from the Secondary Log and a network request is queued into
the Network Manager .
In the background, the adapter is continuously collecting statistics on the
number of commands processed, transactions completed on the network, and
other items. Commands to retrieve these statistics do not require network
transactions, but return the information from the appropriate statistical area.
The following operating modes include the HIU function.
 Master Host Interface Unit (MHIU)
 Host Interface Unit (HIU)
 Master Host Interface Unit/Emulate Host Adapter (MHIU/EHA)
 Host Interface Unit/Emulate Host Adapter (HIU/EHA)

OPERATION AND APPLICATION
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2.3.2 Network Manager Function
Acting as the network primary, the Network Manager function is responsible
for controlling the message traffic on the TIW A Y I network as shown in Figure
2–5. It receives the requests from HIUs and stores them in a NM buffer , routes
them to the designated secondary devices, and returns the secondary response
to the HIU that issued the request. There can be only one adapter configured
with
the Network Manager function in any particular TIW A Y I network.
This function will only process Network Manager commands. These commands
control the TIW A Y I network operations, return network statistical information
and handle the background monitor and redundant media switching
operations. All network requests and responses are queued in the Network
Manager buffers area.
NM
Manages the message traffic on
the TIWAY I network.
Uses memory for:
Network Buffers
Network Stations
Figure 2–5 Network Manager Function

OPERATION AND APPLICATION
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USER MANUAL
The following operational modes include the NM function. However, the
MHIU/EHA mode does not provide access to the NM command set.
 Master Host Interface Unit (MHIU)
 Network Manager (NM)
 Standalone Network Manager (SANM)
 Master Host Interface Unit/Emulate Host Adapter (MHIU/EHA)
2.3.3 The Master Host Inter face Unit Mode
The Master Host Interface Unit (MHIU) is a combination of the HIU and NM
functions as shown in Figure 2–6. A host computer connected to an MHIU can
communicate with secondary devices through the HIU function and control
network performance through the NM function. Remember , only one adapter in
a TIW A Y I network may have the NM function.
HIU NM
MHIU
Figure 2–6 Master Host Interface Unit Diagram

OPERATION AND APPLICATION
UNILINK HOST ADAPTER 2–8
USER MANUAL
2.3.4 Typical Network Applications
Both single and multiple host networks are supported by the UNILINK Host
Adapter. Figure 2–7 illustrates a typical single host network which uses an
MHIU as the host interface and network manager .
Host
Com-
puter
UNILINK
TIWAY I
UniLink Host Adapter ( MHU)
RS–232–C/RS–4
23–A
Host Interface
Cable
Figure 2–7 Typical Single Host Network
Multiple host networks can be configured with a variety of adapters in different
operating modes as illustrated in Figure 2–8 and Figure 2–9. Since the NM
function is not in the same adapter with the HIU function in Figure 2–9, the NM
and HIUs can use the total memory resources of the adapters for their
respective needs. This could be an advantage in large networks where the
additional memory for NM buffers will increase network performance.

OPERATION AND APPLICATION
UNILINK HOST ADAPTER2–9
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Host
Com-
puter
UNILINK
UniLink Host
Adapter (MHU)
Host
Com-
puter
UNILINK
UniLink Host
Adapter (MHU)
Figure 2–8 Typical Multiple Host Network
Host
Com-
puter
UNILINK
(HIU)
Host
Com-
puter
UNILINK
(HIU)
UNILINK
Host
Com-
puter
Figure 2–9 NM Network

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2.3.5 The Emulate Host Adapter Modes
There are two modes available that provide an emulation of the TIW A Y I Host
Adapter; the MHIU/EHA and the HIU/EHA. These modes are limited to the
base command codes 01 through 08, 20, 21, and FC through FF. The POLL
command, code 03, is not available in the HIU/EHA mode. Both of these modes
will operate with applications software written for the TIWAY I Host Adapter.
The MHIU/EHA can directly replace the TIWAY I Host Adapter in single host
network applications. However, the MHIU/EHA cannot be used in a multiple
host
network. The HIU/EHA provides the ability to use TIW A Y I Host Adapter
software applications in a multiple host network.
2.3.6 The Standalone Network Manager Mode
The Standalone Network Manager mode operates independent of any host
computer. It controls the TIWAY I network, but cannot accept any host
commands to change any performance parameters. You can use this mode to
implement
a multiple host network using applications software written for the
TIWAY I Host Adapter. Only minor changes to the applications software are
needed to process the adapter configuration command. A typical network is
shown in Figure 2–10.
Host
Com-
puter
UNILINK
(HIU)
Host
Com-
puter
UNILINK
(HIU)
UNILINK
(SANM)
Figure 2–10 Standalone NM Network
2.4 TIWAY I HOST SOFTWARE SUPPORT
As mentioned in Paragraph 2.3.5, the MHIU/EHA and HIU/EHA modes will
operate with the TIWAY I HOST SOFTWARE products. The MHIU and NM
modes will also work with this product; however , you must enclose the extended
and NM commands in the XP AR subroutine.