ProSoft Technology PDPMV1 User manual

PDPMV1
Stand-alone Gateway
PROFIBUS DPV1 Master
December 13, 2022
PROTOCOL MANUAL

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ProSoft Technology, Inc. Page 2 of 131
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PDPMV1 Protocol Manual
For Public Use.
December 13, 2022
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Important Installation Instructions
Power, Input, and Output (I/O) wiring must be in accordance with Class I, Division 2 wiring methods, Article
501-4 (b) of the National Electrical Code, NFPA 70 for installation in the U.S., or as specified in Section 18-
1J2 of the Canadian Electrical Code for installations in Canada, and in accordance with the authority having
jurisdiction. The following warnings must be heeded:
WARNING - EXPLOSION HAZARD - SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY
FOR CLASS I, DIV. 2;
WARNING - EXPLOSION HAZARD - WHEN IN HAZARDOUS LOCATIONS, TURN OFF POWER BEFORE
REPLACING OR WIRING MODULES
WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN
SWITCHED OFF OR THE AREA IS KNOWN TO BE NON-HAZARDOUS.
THIS DEVICE SHALL BE POWERED BY CLASS 2 OUTPUTS ONLY.
ProLinx®Products Warnings
WARNING –EXPLOSION HAZARD –DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS
BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON-HAZARDOUS.
AVERTISSEMENT –RISQUE D'EXPLOSION –AVANT DE DÉCONNECTER L'EQUIPMENT, COUPER LE
COURANT OU S'ASSURER QUE L'EMPLACEMENT EST DÉSIGNÉ NON DANGEREUX.
ProLinx Gateways with Ethernet Ports
Series C ProLinx™ Gateways with Ethernet ports do NOT include the HTML Web Server. The HTML Web
Server must be ordered as an option. This option requires a factory-installed hardware addition. The HTML
Web Server now supports:
8 MB file storage for HTML files and associated graphics files (previously limited to 384K)
32K maximum HTML page size (previously limited to 16K)
To upgrade a previously purchased Series C model
Contact your ProSoft Technology distributor to order the upgrade and obtain a Returned Merchandise
Authorization (RMA) to return the unit to ProSoft Technology.

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Contents
Your Feedback Please....................................................................................................................... 2
How to Contact Us.............................................................................................................................. 2
ProSoft Technology®Product Documentation ................................................................................... 2
Important Installation Instructions....................................................................................................... 3
ProLinx®Products Warnings.............................................................................................................. 3
ProLinx Gateways with Ethernet Ports............................................................................................... 3
To upgrade a previously purchased Series C model.................................................................... 3
1Functional Overview 7
1.1 About the PROFIBUS Protocol................................................................................. 7
1.2 Compatibility Note..................................................................................................... 7
1.3 PROFIBUS DP Architecture..................................................................................... 8
1.3.1 How Cable Length Affects Communication Rate ..................................................... 8
1.3.2 Bus Access............................................................................................................... 8
1.3.3 Token Passing.......................................................................................................... 9
1.3.4 Master/Slave Polling................................................................................................. 9
1.4 Communication Types.............................................................................................. 9
1.5 Master/Slave Communication Phases...................................................................... 9
1.6 Gateway Internal Database ...................................................................................... 9
2Configuration 10
2.1 Configuring the Gateway ........................................................................................ 10
2.1.1 Installing ProSoft Configuration Builder Software................................................... 10
2.1.2 Setting Up the Project............................................................................................. 13
2.1.3 Setting Gateway Parameters.................................................................................. 15
2.2 PROFIBUS Master DPV1....................................................................................... 17
2.2.1 Input Start Register................................................................................................. 17
2.2.2 Input Data Size ....................................................................................................... 17
2.2.3 Output Start Register.............................................................................................. 17
2.2.4 Output Data Size .................................................................................................... 17
2.2.5 Input Byte Swap...................................................................................................... 18
2.2.6 Output Byte Swap................................................................................................... 18
2.2.7 Mailbox Register..................................................................................................... 19
2.2.8 Slave Diagnostics Register..................................................................................... 20
2.2.9 Alarm Register........................................................................................................ 20
2.2.10 Status Data Register............................................................................................... 20
2.2.11 Minimum Command Delay ..................................................................................... 20
2.2.12 Response Timeout.................................................................................................. 20
2.2.13 Watchdog Register ................................................................................................. 20
2.2.14 Watchdog Timeout.................................................................................................. 20
2.2.15 Watchdog Reset Value........................................................................................... 21
2.3 PROFIBUS Master Commands.............................................................................. 22
2.4 Example Mailbox Commands................................................................................. 24
2.4.1 Set Operating Mode................................................................................................ 24
2.4.2 Get Live List............................................................................................................ 28
2.4.3 Start/Stop Slaves.................................................................................................... 34
2.4.4 Other Mailbox Commands...................................................................................... 40
2.5 Configuring the PROFIBUS DP Network................................................................ 43
2.5.1 Installing the GSD Files .......................................................................................... 43

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2.5.2 Configuring the PROFIBUS Slaves........................................................................ 44
2.5.3 Printing the ProLinx Memory Map .......................................................................... 59
2.6 Downloading the Project to the Gateway ............................................................... 61
2.6.1 Download via Ethernet Port.................................................................................... 61
2.6.2 Assigning a Temporary IP Address........................................................................ 62
2.6.3 Download via Serial Port ........................................................................................ 65
2.7 Backing Up the Project ........................................................................................... 66
3Mailbox Messaging 68
3.1 Mailbox Message Queuing..................................................................................... 69
3.1.1 Queue Timeouts ..................................................................................................... 69
3.2 Special Function Mailbox Messaging Commands.................................................. 70
3.2.1 Mailbox Message: Set Operating Mode ................................................................. 71
3.2.2 Mailbox Message: Set Slave Mode ........................................................................ 73
3.2.3 Mailbox Message: Get Slave Diagnostics .............................................................. 76
3.2.4 Mailbox Message: Get Slave Configuration ........................................................... 79
3.2.5 Mailbox Message: Get Database Information ........................................................ 80
3.2.6 Mailbox Message: Get Live List.............................................................................. 82
3.2.7 Mailbox Message: Acyclic Data Read: Class 1 ...................................................... 84
3.2.8 Mailbox Message: Acyclic Data Write: Class 1 ...................................................... 86
3.2.9 Mailbox Message: Start Slave................................................................................ 88
3.2.10 Mailbox Message: Stop Slave ................................................................................ 89
3.3 Mailbox Messaging Error Codes............................................................................. 92
3.3.1 Acyclic Message Status Word................................................................................ 92
3.3.2 Return Codes.......................................................................................................... 93
3.3.3 Error Codes............................................................................................................. 94
3.3.4 DP-V1 Error Codes................................................................................................. 95
3.3.5 Command Error Codes........................................................................................... 96
4Diagnostics and Troubleshooting 97
4.1 Required Hardware................................................................................................. 97
4.2 Basic Troubleshooting Steps.................................................................................. 97
4.3 PROFIBUS DP-V1 (PDPMV1 Driver) Master LED Indicators................................ 98
4.3.1 PROFIBUS Master Indicators................................................................................. 98
4.3.2 Examples................................................................................................................ 99
4.4 Viewing the Online Status of the PROFIBUS Network......................................... 100
4.5 Using ProSoft Configuration Builder (PCB) for Diagnostics................................. 102
4.5.1 Using the Diagnostic Window in ProSoft Configuration Builder ........................... 102
4.5.2 Main Menu............................................................................................................ 104
4.6 Standard PROFIBUS Slave Diagnostic Bytes...................................................... 106
4.6.1 Byte 0 - Station Status 1 Bits................................................................................ 106
4.6.2 Byte 1 - Station Status 2 Bits................................................................................ 106
4.6.3 Byte 2 - Station Status 3 Bits................................................................................ 107
4.6.4 Byte 3 - Master Address ....................................................................................... 107
4.6.5 Byte 4 - Ident Number High.................................................................................. 107
4.6.6 Byte 5 - Ident Number Low................................................................................... 107
4.7 Status and Status Mapping................................................................................... 108
4.7.1 PDPMV1 Command Status Data Area................................................................. 109
5Reference 110
5.1 PROFIBUS comDTM............................................................................................ 110

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5.1.1 ProSoft Technology Product Availability............................................................... 110
5.1.2 Introduction to PROFIBUS comDTM.................................................................... 110
5.1.3 System Requirements .......................................................................................... 113
5.1.4 Installation............................................................................................................. 114
5.1.5 Quick Start............................................................................................................ 115
5.1.6 Verifying the comDTM Version and comDTM Install Version .............................. 119
5.2 RS-232 Configuration/Debug Port........................................................................ 124
5.3 DB9 to Mini-DIN Adaptor (Cable 09) .................................................................... 124
5.4 PROFIBUS Master Port........................................................................................ 125
5.5 Supported PROFIBUS Services........................................................................... 126
5.6 Constructing a Bus Cable for PROFIBUS DP ...................................................... 127
6Support, Service & Warranty 131
6.1 Contacting Technical Support............................................................................... 131
6.2 Warranty Information ............................................................................................ 131

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1 Functional Overview
The PROFIBUS Master protocol driver exists as a single port implementation. The driver
can be configured as a Class 1 and Class 2 PROFIBUS Master to interface with other
PROFIBUS slave devices. The unit is also used for configuration of the nodes on the
PROFIBUS network. It provides access to standard and extended diagnostic
information, as well as freeze/sync capability, Acyclic Communication (DPV1, Class 1
and 2), and Alarm Handling (DPV1). The PROFIBUS Master port can be used to
continuously interface with PROFIBUS slave devices over a serial communication
interface (RS-485).
1.1 About the PROFIBUS Protocol
PROFIBUS (Process Field Bus) is a widely used, open-standards protocol created by a
consortium of European factory automation suppliers in 1989.
PROFIBUS is a Master/slave protocol. The Master establishes a connection to the
remote slave. When the connection is established, the Master sends the PROFIBUS
commands to the slave.
The ProLinx PDPMV1 gateway unit acts as an input/output module between devices on
a PROFIBUS DP network and any other communication protocol. The gateway uses an
internal database to send data and mailbox requests and responses to all PROFIBUS
slaves on the PROFIBUS DP network.
PROFIBUS supports a variety of network types. The network type supported by the
PLX-PDPMV1 gateway is PROFIBUS DP version 1.0, which is designed for remote I/O
systems, motor control centers, and variable speed drives.
1.2 Compatibility Note
The PDPMV1 product is not backward-compatible with the PDPM product due to new
enhancements and command structure. The PDPMV1 PROFIBUS DP-V1 Master
gateway provides enhanced features beyond the PDPM DP-V0 gateway as follows:
1 Increased Cyclic I/O. The PDPMV1 provides 768 Words of Input and 768 Words of
Output.
2 ProSoft Configuration Builder (PCB) complete support. The PCB provides module-
level configuration and integrated PROFIBUS Master network configuration support.
3 The PDPMV1 Master supports DP-V1 Class 1 or Class 2 DPV1 features such as
acyclic communication with slaves for parameterization and other slave settings,
alarm handling, extended diagnostics.

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1.3 PROFIBUS DP Architecture
The PROFIBUS DP-V1 Master network supports multiple Master systems with several
slaves.
The following table shows the most important features of PROFIBUS DP-V1 Master:
Standard
EIN 501 70
DIN 19245
Transmission equipment (Physical)
EIA RS-485
IEC 1158-2 (through link or coupler)
Fiber Optic Cable (not available)
Transfer procedure
Half-duplex
Bus topology
Linear bus with active bus termination
Bus cable type
Shielded twisted pair conductors
Connector
9-pin D-Sub
Number of nodes on the bus
Max: 32 with no repeaters
Max: 125 with 3 repeaters in 4 segments
1.3.1 How Cable Length Affects Communication Rate
Max Bus Cable Length Per Segment
Baud Rates (for 12 Mbps cable)
1.2 km
9.6 kbit/sec
1.2 km
19.2 kbit/sec
1.2 km
93.75 kbit/sec
1.0 km
187.5 kbit/sec
0.5 km
500 kbit/sec
0.2 km
1.5 Mbit/sec
0.1 km
3 Mbit/sec
0.1 km
8 Mbit/sec
0.1 km
12 Mbit/sec
1.3.2 Bus Access
Two different bus access procedures handle the various communication requirements
for the PROFIBUS DP-V1 Master topology:
Token Passing
Polling

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1.3.3 Token Passing
Token passing ring is the basis for communication between the more complex, active
stations. All stations have the same rights in that a token is passed from station to
station in a logical ring. The token is passed to each station with a maximum, definable
token cycle time. A station is given transmission rights for the duration of time that it has
the token.
1.3.4 Master/Slave Polling
Master/slave polling guarantees a cyclic, real-time based data exchange between the
station with transmission rights, the active station, and its subordinates, the passive
stations. In this case, the Master is able to pass data to the slave and/or receive data.
The services in layer 2 (field-bus data link in ISO-OSI reference model) organize this
communication.
1.4 Communication Types
In addition to point-to-point data transfer, the PROFIBUS protocol can also handle the
following types of communication.
Broadcast communication: An active node sends an unacknowledged message to all
other nodes (Master and slaves)
Multicast communication (control instructions): An active node sends an
unacknowledged message to a group of nodes (Master and slaves)
1.5 Master/Slave Communication Phases
The communication between the Master and slaves takes place in the following phases:
Parameterization and configuration phase
Usable data transfer phase
Before a DP slave can be integrated into the usable data transfer phase, the
parameterization and configuration phase runs a device identification test that verifies
that the planned configuration matches the actual device configuration for each slave in
the PROFIBUS network. The test verifies that:
The appropriate device is present
The device’s station address matches the station address in the bus configuration
The formats, telegram length information, and bus parameters are correct
The number of configured inputs and outputs is correct
1.6 Gateway Internal Database
The internal database is central to the functionality of the gateway. This database is
shared between all the ports on the gateway and is used as a conduit to pass
information from one device on one network to one or more devices on either connected
network. This permits data from devices on one communication port or network to be
viewed and controlled by devices on another port or network.
In addition to data from the Master and slave ports, status and error information
generated by the gateway can also be mapped into the internal database.

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2 Configuration
2.1 Configuring the Gateway
Because the task of configuring the PROFIBUS network can be challenging, ProSoft
Technology has provided a configuration tool called ProSoft Configuration Builder (PCB)
that will help you with the following tasks:
Creating a configuration project (page 13)
Setting gateway parameters (page 15)
Configuring the PROFIBUS network (page 43) (Master and slaves)
Downloading the project to the gateway (page 61)
The following topics of this chapter explain each task step-by-step.
2.1.1 Installing ProSoft Configuration Builder Software
You must install the ProSoft Configuration Builder (PCB) software to configure the
gateway.
1 Open your web browser and navigate to www.prosoft-technology.com
2 Click the DOWNLOAD HERE link to download the latest version of ProSoft
Configuration Builder.
3 Choose SAVE or SAVE FILE when prompted.
4 Save the file to your Windows Desktop, so that you can find it easily when you have
finished downloading.
5 When the download is complete, locate and open the file, and then follow the
instructions on your screen to install the program.
Using the Online Help
Most of the information needed to help you use ProSoft Configuration Builder is provided
in a Help System that is always available whenever you are running ProSoft
Configuration Builder. The Help System does not require an Internet connection.
To view the help pages, start ProSoft Configuration Builder, open the HELP menu, and
then choose CONTENTS.
Adding a Location to an Existing Project File
1 Right-click the PROJECT icon and select ADD LOCATION. A new Location icon
appears.
or
Select the PROJECT icon.
2 Choose PROJECT from the PROJECT menu, and then choose ADD LOCATION. A new
Location icon appears.
or
If the Default Location has not been named (is not already an existing project), right-
click the folder and choose RENAME.
3 Type in the Location name.

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Adding a Project to an Existing Project File
1 Select the DEFAULT PROJECT icon.
2 Open the PROJECT menu, choose PROJECT,and then choose ADD PROJECT. This
action opens a new Project folder.
Adding a Module
Begin the process of creating your custom application configuration by selecting the
module type of your ProLinx gateway.
1 Double-click the DEFAULT MODULE icon to open the Choose Module Type dialog box.
2 In the Choose Module Type dialog box, select the MODULE type.
Or
1 Open the PROJECT menu and choose LOCATION.
2 On the LOCATION menu, choose ADD MODULE.
To add a module to a different location
1 Right-click the LOCATION folder and choose ADD MODULE. A new Module icon
appears.
Or
1 Select the LOCATION icon.
2 From the PROJECT menu, select LOCATION, and then select ADD MODULE.

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Configuring Gateway Parameters
1 Click the [+] sign next to the module icon to expand gateway information.
2 Click the [+] sign next to any icon to view gateway information and configuration
options.
3 Double-click any icon to open an Edit dialog box.
4 To edit a parameter, select the parameter in the left pane and make your changes in
the right pane.
5 Click OK to save your changes.
Creating Optional Comment Entries
1 Click the [+] to the left of the icon to expand the module comments.
2 Double-click the icon. The Edit - Module Comment dialog box appears.
3 Enter your comment and click OK to save your changes.
Printing a Configuration File
1 Select the module icon, and then click the right mouse button to open a shortcut
menu.
2 On the shortcut menu, choose VIEW CONFIGURATION.This action opens the View
Configuration window.
3 In the View Configuration window, open the FILE menu, and choose PRINT.This
action opens the Print dialog box.
4 In the Print dialog box, choose the printer to use from the drop-down list, select
printing options, and then click OK.

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2.1.2 Setting Up the Project
To begin, start the ProSoft Configuration Builder utility. If you have used other Windows
configuration tools before, you will find the screen layout familiar. ProSoft Configuration
Builder’s window consists of a tree view on the left, an information pane and a
configuration pane on the right side of the window. When you first start ProSoft
Configuration Builder, the tree view consists of folders for Default Project and Default
Location, with a Default Module in the Default Location folder. The following illustration
shows the ProSoft Configuration Builder window with a new project.

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Your first task is to add the PDPMV1 gateway to the project.
1 Use the mouse to select DEFAULT MODULE in the tree view, and then click the right
mouse button to open a shortcut menu.
2 On the shortcut menu, select CHOOSE MODULE TYPE. This action opens the Choose
Module Type dialog box.
3 In the Product Line Filter area of the dialog box, select the gateway series (PLX5K
for wired gateways, or PLX6K for wireless gateways). In the Select Module Type
dropdown list, select the model number for your gateway (for example, 5204-MNET-
PDPMV1), and then click OK to save your settings and return to the ProSoft
Configuration Builder window.
The next task is to set the gateway parameters.

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2.1.3 Setting Gateway Parameters
Notice that the contents of the information pane and the configuration pane changed
when you added the PDPMV1 gateway to the project. The red "X" icon indicates that the
gateway’s configuration is incomplete.
1 Click the plus sign [+] next to the module icon to expand the module tree, and then
expand the PLX PDPM-V1 tree.
2 Double-click the PROFIBUS MASTER DPV1 object. This action opens the Edit dialog
box.
3 In the Edit dialog box, enter the values for Input Data Size and Output Data Size
(PROFIBUS input and output point words) to match the values required by your
application. To change a value, select the parameter to modify in the left pane, and
then type the new value in the edit field in the right pane.

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For the sample application, the input and output data size values are fixed to a value
of 768.
4 Click OK to save your settings and return to the ProSoft Configuration Builder
window.
At this time, you may wish to rename the Default Project and Default Location folders in
the tree view.
To rename an object
1 Select the object, and then click the right mouse button to open a shortcut menu.
From the shortcut menu, choose RENAME.
2 Type the name to assign to the object.
3 Click away from the object to save the new name.

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2.2 PROFIBUS Master DPV1
2.2.1 Input Start Register
0to 3230
Database start register for input data.
2.2.2 Input Data Size
0to 768
Total number of PROFIBUS Input Words (one word equals two bytes) from all
PROFIBUS slaves. These Input Words will be the data received from slave devices on
the PROFIBUS network.
2.2.3 Output Start Register
0to 3230
Database start register for output data.
2.2.4 Output Data Size
0to 768
Total number of PROFIBUS Output Words (one word equals two bytes) to be sent to all
PROFIBUS slaves. These Output Words will be the data sent to slave devices on the
PROFIBUS network.

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2.2.5 Input Byte Swap
YES or NO
This parameter determines if the bytes in the PROFIBUS Input Data area are swapped
before being stored in the gateway memory database. If the parameter is set to NO, no
swapping will be applied. If the parameter is set to YES, the order of bytes in each word
will be swapped before being stored in memory.
Example:
With Input Byte Swap set to NO, incoming order is unchanged - ABCDEF
With Input Byte Swap set to YES, each byte pair is swapped - BADCFE
2.2.6 Output Byte Swap
YES or NO
This parameter determines if the bytes in the PROFIBUS Output Data area are swapped
before being transmitted to slaves on the PROFIBUS network. If the parameter is set to
NO, no swapping will be applied. If the parameter is set to YES, the order of bytes in
each word will be swapped before being transmitted.
Example:
With Output Byte Swap set to NO, outgoing output order is unchanged - ABCDEF
With Output Byte Swap set to YES, each output byte pair is swapped - BADCFE

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2.2.7 Mailbox Register
0to 3700, -1 to disable
Enter the database register for DPV1 mailbox messages, or -1 to disable mailbox
messages.
Mailbox messages can be sent through the database to the PROFIBUS Master. This
functionality requires 290 registers of the database. The map of the database area
utilized for this purpose is as follows.
Offset
Description
0
This is the handshake word used to tell the PROFIBUS driver when a new acyclic
message is ready to send. If the value at this location is zero (0), no message will be
sent. If the value is not zero, then the PROFIBUS driver will send an acyclic
message using the contents of words 1 through 144. This handshake word should
be set to a non-zero value only after the complete acyclic message is stored in
offsets 1 to 144. After the PROFIBUS driver has added the acyclic message to the
queue, this register will be set to zero (0), so that the message is not repeated and to
indicate that a new acyclic message may be prepared.
NOTE: It would be a good practice to check the value of word 145 to be sure it is set
to zero (indicating that no acyclic messages are awaiting processing) before setting
this word to a non-zero value, triggering an acyclic message. This will help avoid
acyclic data collisions and data loss.
1 to 144
This area holds the acyclic message bytes to send. Please refer to Mailbox
Messaging (page 68) for the format of this data area.
NOTE: The header words (first 32 bytes) are stored in little-endian format and the
gateway will change the order to big-endian format before sending.
145
This handshake word indicates when a new acyclic response message has been
received by the PROFIBUS driver. If the value is zero (0), no response message has
been received. If the value is non-zero, a response message has been received and
stored in words 146 to 289. This data should be transferred by the other gateway
protocol for external processing. After the acyclic message has been externally
processed, a message should be returned through the other protocol that sets this
address to zero, to indicate readiness to receive and process a new acyclic response
message.
146 to 289
This area holds the acyclic message response bytes. Please refer to Mailbox
Messaging (page 68) for the format of this data area. The header words (first 32
bytes) are stored in little-endian format to make it easier to use.
Alarm acyclic messages are sent from the PROFIBUS driver to the database if this
feature is enabled by entering a valid database register in the configuration file. This
feature requires 145 database registers. The format of the data area is as follows.
Offset
Description
0
This is the alarm handshake word. If the value is not zero (0), alarm data is present
in the words 1 through 144. This register should be set to zero after the alarm is
process, so another alarm can be passed through the database. If this register is
zero (0), the database area is ready to receive a new alarm message.
1 to 144
This area holds the alarm acyclic message received by the PROFIBUS Master
device. Please refer to Mailbox Messaging (page 68) for a description of this acyclic
message. The header (first 32 bytes) of the message is stored in little-endian format
to make it easier to process.

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2.2.8 Slave Diagnostics Register
0to 3600, -1 to disable
Enter the database register start location for DPV1 slave diagnostics messages, or -1 to
disable slave diagnostics.
When this register is enabled, the gateway will automatically place 378 words of
collected slave diagnostic data into the specified database start register.
Each slave requires 3 words of data. Data is gathered for slaves 0 to 125. The
application will poll for a new slave every 100 milliseconds.
2.2.9 Alarm Register
0to 3900, -1 to disable
Enter the database register for DPV1 alarm messages, or -1 to disable alarm messages.
2.2.10 Status Data Register
0to 3900, -1 to disable
Enter the gateway memory database register for DP-V1 status data messages, or -1 to
disable status data messages.
2.2.11 Minimum Command Delay
0to 32767
Minimum number of milliseconds between each command.
2.2.12 Response Timeout
0to 5000 milliseconds
Number of milliseconds to wait for response to command. The value is set depending
upon the communication network used and the expected response time of the slowest
device on the network.
2.2.13 Watchdog Register
The Watchdog function allows the gateway to monitor a database register, the
Watchdog Register, to check for loss of communication with the non-PROFIBUS
communication protocol. If this function is used, the other gateway protocol is expected
to change the value in the Watchdog Register at an interval less than the amount of time
specified in the Watchdog Timeout parameter. If the value in the Watchdog Register
does not change within this amount of time, a communication loss is assumed and the
Watchdog function will set the PROFIBUS outputs to the default value specified in the
Watchdog Reset Value parameter. To disable this function, set this parameter to a value
of -1.
2.2.14 Watchdog Timeout
Sets the period of time (in 0.1s increments) for the gateway to wait for communication
loss detection. For example, set this parameter to 100 to set a waiting period of 10
seconds. To disable this function, set this parameter to a value of -1.