3 configuring the driver
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1. Now select the desired PLC node number and continue by setting be desired Device Then specify the number register number within the device type Note that the corresponding Mnemonic is displayed and updated as you select the appropriate parameters This is a help to make sure you always bind to the correct process variable Continue this process for each atom on the object and save the parameters by clicking the OK button when finished C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver 4 USE WITH MODEMS Using IGSS Modicon Modbus driver with a modem can be costly if not using with a flatrate line and it is suggested that you use Connection Scheduling and call your device at intervals to fetch new data this is especially true if your device support historic data mm IGSS System Configuration c togo documentation tmod tmod ee e Le de 6 2 File Edit View Tools Help sl L S Configuration name 7tmod Node Properties Remote Connection Connection Misc Advanced a Documentation I Modicon Modbus protocol dri Configure Remote Connection to Node E Za Modem 0 E Specify parameters to be used to connect remotely to DEER Cl fe PLC node Enter the phone number Enter extra AT commands 12345678 I Connection Scheduling Specify when the PC should connect to the PLC for retrieval of historical data IV Connect at specific points in2. 4 For Help press Fl Since the driver is not continuously connected to the PLC you might want the PLC to store one or historical data in designated areas in the PLC and let the driver fetch and timestamp these data when it is online If you e g want the driver to only be online each 4 hours but require some important tags to be stored in the IGSS system each 5 minutes e g for reporting or trending then you can use the Collecting Historical Data option to define where the data are stored Click the Settings button to bring up the dialog used to define the layout of the historical data The dialog contains one row for each historical tag you want to define The first 3 columns Data C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver Group Word Offset Word Length contain the fields to define where and how the data will be stored in IGSS These parameters are used to bind the data to specific objects Historical Data Settings for Node 0 Ab me Historical Data Settings The first two columns define the IGSS address into which the historical data should be mapped The third colum is value size in words The remaining columns define the layout of the historical data in the node CU361 Specify Log channel number 1 31 Data Grow Word Offse Word Leng N A Chan no H 1 1 1 0 2 1 2 0 3 1 3 4 m p Rows painted in red contains invalid values
3. 3 CONFIGURING THE DRIVER This section describes how to configure the driver parameters All parameters must be configured by using the System Configuration sysconfig exe application Please note that the IGSS system MUST be stopped and restarted for the configured parameters to take effect Start the System Configuration application and add the driver 7TMOD ID 20 to the requested station IGSS System Configuration c togo documentation tmod tmod File Edit View Tools Help aad 5e oi mx Configuration name 7tmod Ze by Driver Information Advanced Extemal Types E a Documentation 8 Modicon Modbus protocol dri Driver Information Modicon Modbus protocol driver Driver Id 20 Statistics Top Nodes 0 Sub Nodes 0 File Versions Driver DLL File 7TMOD DLL Version 8 00 00 build 10167 TP Configuration DLL File 7TMODC DLL Version 8 00 00 build 10139 m gt For Help press Fl When the driver has been added to the relevant station you are ready to add and set up the interface and PLC nodes Right click the Modicon Modbus protocol driver tag in the left side tree view and select New Interface in the popup menu C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver The Connection Type appears r IGSS System Configurat
4. Unused se None v Unused v Unused User defined entries for command menu Use pipe to delimit multiple menu entries Use semicolon to delimit multiple commands Prefix box to display 200 in the command menu otherwise text up till first space is used In parameter list O will be substituted with object name and A with area L oe James II Her Since defining a connection schedule when using GPRS means that you are not online with the PLC nodes continuously you might want to consider giving the user a possibility to manually establish a connection to the PLC through the IGSS UI This is done by defining a Connection Object which allows the user to simply click a button on the UI to control the connection In the Connection Misc pane you should first enable the Monitor and control connection option in the Connection Status and Control group When this option is enabled you should enter 0 as Data Group and 0 as offset C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver R _ x B IGSS System Configuration c c togoldocumentation 7tmedV7tmod _ am en File Edit View Tools Help S s aema 2 12 4 Configuration name 7tmod Node Properties Remote Connection Connection Misc Advanced o Documentation Modicon Modbus protocol dri 2 Modem 0 Collecting Historical Data Whenever IGSS connects to the node it will
5. and will not be saved Clear row Import from file Cancel Data Group This field should always be set to 0 This is a fixed value which is used by the IGSS Modicon Modbus GPRS Driver to recognize that this is historical data The value 512 maps to the Memory Type Local Code Word Offset This field id used to distinguish between the different historical data tags It is recommended to consequtive starting at 1 one The value of this field corresponds to the Word Offset parameter in the Edit Mapping dialog when we bind the historical data to specific objects See details below Word Length This parameter is used to tell the driver the size of each of the historical data points This should be set to 1 if the historical data is a 16 bit data type and it should be set to 2 if the historical data is a 32 bit data type Chan Node This parameter tells the driver which history channel it should access it is only available for some Processor Types like the Grundfos CU361 Technical note IGSS requires time stamped data to ALWAYS come in a time synchronious sequence with the oldest values first This is automatically taken care of by the driver When binding the historical data series to IGSS objects you should set the Memory Type to C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver Local Code and then select a Word Offset which matched the Word Offset of one of
6. be useful to display error codes reported by the driver 0x1401 7TMOD INVALID POINTS Cause Read Holding Register response has an invalid number of points Action Check communication and PLC program 0x1402 7TMOD INVALID FUNCTION CODE RETURNED Cause The response from the PLC contained an invalid Function Code Action Check communication and PLC program 0x1403 7TMOD INVALID NODE RETURNED Cause The returned Slave Address did not match the Node number Action Check subcode Subcode The wrong Slave Address returned from the PLC 0x1404 7TMOD EXCEPTION RESPONSE Cause The returned Function showed an Exception Response Action Check subcode Subcode Modbus Function Cose in high word Modbus Exception Code in low word 0x1405 7TMOD CANT SEND Cause Failed to write to COM port Action Verify Modem Comport settings are correct 0x1406 7TMOD CANT RECV Cause Failed to receive from COM port Action Verify Modem Comport settings are correct 0x1407 7TMOD_CLEARCOMERROR Cause Failed to clear COM port Action Verify Modem Comport settings are correct 0x1408 7TMOD RECV LENGTH ERROR1 Cause More data received than defined in DriverSetup Segment size Action None if the problem persists contact IGSS Support 0x1409 7TMOD RECV LENGTH ERROR2 Cause More data received than defined in DriverSetup Segment size Action None if the problem persists contact IGSS Support C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX
7. connect hold time option allows you to define how many seconds the driver will stay connected online if the user forces the driver to make a connection to the PLC The Send cmd connect hold time option allows you to specify how many seconds the driver will stay online one the PLC node after the user has send a command This latter is useful if the user should be able to see the response of the command which he she has just sent Once you are done defining the connection schedule continue to the Connection Misc pane E IGSS System Configuration c togo documentation 7tmod imod Kids Node Properties Remote Connection Connection Misc Advanced File Edit View Tools Help Configuration name 7tmod IS Documentation Modicon Modbus protocol dri E Ta Modem 0 Collecting Historical Data Whenever IGSS connects to the node it will read historical data values accumulated by the node since it was last connected Currently exists 0 historical data definitions for this node Connection Status and Control Famole ee can oe mariae cae ee nirai a I Monitor and control connection Address used for connection status and control for this node Data Group Message type Word Offset Callback to Node GQ I Select this option if IGSS should perform a callback to the TE node whenever the node establishes an unsolicited connection with the PC
8. port you must specify the communication parameters individually Each port must be configured with Serial port ID e g COM1 and serial port parameters Default serial parameters are 9600 Baud 8 data bits 1 stop bit and no parity These parameters must correspond with the parameters which you have set up in the sub stations C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver For modem connections The driver supports using a dialed up connection PSTN or GSM In this case the PC and each substation must be equipped with a suitable PSTN or GSM modem To configure one or more modem connections you must select the option The PC and the PLC are connected via a modem E IGSS System Configuration c togo documentation 7tmod 7tmod File Edit View Tools Help b d Se wminx amp PV K Configuration name 7tmod Connection Type Serial Port Remote a a Documentation 5 Modicon Modbus protocol dri Specify Type of Connection i CA Connect directly via the serial port The PC and the PLC is directly connected via a serial cable Configure the serial port on the tab Serial Port Scheduled Connection The PC will only establish a connection with the PLC at By predetermined times and or with a fixed time interval The PC and the PLC are connected via a modem Select modem ID Eh The PC and the PLC are connected directly or via equipment which does not require an
9. read historical data values accumulated by the node since it was last connected Currently exists 0 historical data definitions for this node Connection Status and Control The remote connection can be monitored and controlled by connecting an IGSS object to a specific address I Monitor and control connection Address used for connection status and control for this node Data Group Message type fo Word Offset fo r Callback to Node I Select this option if IGSS should perform a callback to the La node whenever the node establishes an unsolicited connection with the PC w For Help press F1 NUM 7 In the IGSS definition module you should then create a new digital object based on the build in template called DIALUP C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver Object Browser Locked by Create object from menu gt RB 7tmodgrps 11 Global GC Digital i fog None ga DIALSUSPEND an DIALUP m Tree node filter settings Criteria Wild card text criteria Type all possible v Template v Create new object rea Global Template DIALUP Type Digital U Always on top Advanced Set the scan interval to None List filter settings Show reductions Show only std types E Show only referenced Wild card text criteria 2 Open by name Go to di
10. the historical data series you have just defined Analog2 Global E e Report Fomat Data Management Definitions Display PLC Node for object Analog2 Driver 7TMODGPRS Document e Actual Value Node 0 v Set Point Low Limit PLC Address for Actual Value atom Low Alam Alarm in Data type Local Code Offset Dec 1 Offset Hex 1 Bit Offset 0 ca Externaltype FP165 X Use numeric to scroll to next previous atom Make sure the I O mode is set to In It is VERY IMPORTANT that you set the scan interval to None in the Data Management Definitions pane This is because that the scan interval doesn t make sense for historical data series and thus should be disabled by setting the Scan interval parameter to None C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver Analog2 amp Global nn Calculation Report Format Layers Data Management Definitions Logging All changes All values None Log outgoing commands E Log to SQL Database Transfer to history EA Average Reduced value Minimum Ko Actual total value Maximum Sum Idealized total value Actual None None in mins Change Difference For each data reduction method E Log to printer Alarm delay I 0 sec Delete Protection Safe commands Scale as Connect to
11. RROR CODES ssi desiderte danne dy keep ytes de dE 23 C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver 1 INTRODUCTION This document describes how to set up and troubleshoot the IGSS 7TMOD Interface Driver The driver implements the Modicon Modbus protocol stack over modem serial connection 1 1 SOFTWARE REQUIREMENTS None see Hardware Requirements below The driver is designed to be used with IGSS version 7 0 and higher 1 2 HARDWARE REQUIREMENTS The driver requires a standard modem or serial connection for the IGSS pc and PLC GSM modems and serial devices like MOXA may be used Please refer to the manufacturers manual for PLC setup C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver 2 INSTALLATION 2 1 AUTOMATIC INSTALLATION The driver is normally installed automatically along with the rest of the IGSS system To verify if the driver has been installed open the System Configuration sysconfig exe and check if a driver with ID 81 is present in the list of available drivers Select Communication Driver LUE x lt e Select a communication driver to be installed from the list below Then click OK Driver ID Description 2 ei TCML 13 General Comli 31 protocol driver TSBUS 14 Saia S Bus protocol driver m 7TSQD TEK Square D SY LINK protocol driver m ZTIZU 16 Idec Izumi interface driver m 7TOMRA 17 Omron Sysmac Way inter
12. agram Open Select Show properties Name ConnectionControl Node 0 Description Name Value E Description Moving symbol C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver E Log outgoing commands E Log to SQL Database Data reduction Transfer to history Average Reduced value Minimum Maximum Actual total value Sum Idealized total value Actual None C Change Fer s each a Difference Delete Use pipe I to delimit multiple menu entries Use semicolon to delimit multiple commands Prefix box to display 200 in the command menu otherwise text up till first space is used In parameter list O will be substituted with object name and SA with area L oe II cance He And bind both the Command and the State atom to Historical Data Word and Word Offset 0 this corresponds to parameters 0 and 0 we just set up in the Connection Misc pane for the driver C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver PLC Node for object ConnectionControl Node 0 iver 7TMODGPRS Document v e OfFree Value OAam n OAam Out 0 v PLC Address for Command atom Data type Local Code Offset Dec 0 Offset Hex 0 Bit Offset New E Delete External type FP1BS Use numeric to scroll to next previous atom If you want to use e g a Comm
13. and Field mimic to allow the user to control the connection state to the PLC node then you could define something like this C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver ConnectionControl Node 0 i LE Son Change Siate 1 Bt Map 1 0 1 Aam in Aek Bt Conmand Sate Config Lass Set Command Layout Disconnect Fetch Historical Data C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver 5 PERFORMANCE AND THROUGHPUT The driver is designed for maximum throughput on a PSTN network On a standard PC you should expect a throughput of 5 request response cycles pr minute depending on your modem To handle multiple PLCs concurrently you will need more than one modem IMPORTANT NOTICE The IGSS communication engine optimizes communication throughput by seeking to group data whenever possible This means that if the communication engine is required to read e g word offset 1 and word offset 31 then it will read data registers 1 2 through to word offset 31 as a block This is much more efficient than reading the two data registers using two separate read requests C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver 6 ERROR CODES This section describes the error codes specific to the IGSS 7TMOD interface driver While troubleshooting communication or addressing problems the Driver Test Application might
14. ass 7TMOD IGSS Modicon Modbus Serial Driver User s Manual Seven Technologies 7 Technologies A S Bistruphave 3 DK 3460 Birker d Denmark Phone 45 45 900 700 Fax 45 45 900 701 CVR no DK 73 63 41 13 E mail sales 7t dk World Wide Web http www 7t dk 7TMOD IGSS Modicon Modbus serial driver DISCLAIMER This is an unpublished work the copyright of which vests in SEVEN TECHNOLOGIES A S All rights reserved The information contained herein is the property of SEVEN TECHNOLOGIES and is supplied without liability for errors or omissions No part may be reproduced or used except as authorised by contract or other written permission The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver CONTENTS 1 INTRODUCTION ker 3 1 1 Software Requirements A 3 1 2 Hardware Requirements erini durran E E O 3 2 IER EE TO N TR 4 2 1 Automatic Installation rsr aa TE 4 2 2 Manual Installatoma varaner aged AS 4 3 CONFIGURING THE DRIVER siiis ekbearinanaainiai eao aea Naan Aaa ehtaa NAAR a AENEA NASAN a Raa ARE aaka 5 3 1 ee ne Re EE 9 3 2 Configuring the Objects rann vener rennnr renn nrnnnnnennnnrennnrnennnnnnennenennn 11 4 VSE WTA MODEM S dees eege eh Eeer 12 5 PERFORMANCE AND THROUGHPUT annvnnnnrvnnnvrvnnnvnnnnrvnrrrrersnrresnnvnrenrenrrrresnnrnssnnnnrennen 22 6 E
15. face driver m TAS511 18 Siemens 45511 interface driver m HEI 19 Telemechanique Way protocol driver 7TMOD Modicon Modbus protocol driver ei ZTMIT 21 Mitsubishi Melsec 4 protocol driver ei TMITTCP 22 Mitsubishi Melsec 4 TCP IP protocol driver mal zum 99 been t Becken COMCADI mentaanl derme 4 It p Cancel If the driver is present then you can proceed to the next section Configuring the Driver otherwise install the driver using the manual installation procedure described below 2 2 MANUAL INSTALLATION Using the following step by step guide will install the driver manually on a PC where the IGSS system has already been installed You need to stop the IGSS system prior to the installation and you need to be logged in with a user account with Administrator rights Step 1 Verify that the files 7TMOD DLL 7TMODc DLL COMMDRV REG latest updated version exists in the GSS directory If the files doesn t exists run the IGSSUpdateClient to get the files from the 7T WEB server or contact 7T Support supportQ7t dk to get the files via e mail Step 2 Double click on the COMMDRV REG file to import the registry settings needed for the system to recognize the driver please notice that double clicking on a REG file in a 64 Bit Windows will NOT work please contact 7T Support for instructions The driver is now installed C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver
16. interface modem or comport in the left pane and choose New node in the context menu You have now added your first node Node 0 E IGSS System Configuration c togo documentation 7tmod 7tmod File Edit View Tools Help Configuration name 7tmod Node Properties Remote Connection Connection Misc Advanced E a Documentation i j I Modicon Modbus protocol driv re meer ER Fa o H Radio NACOMI Spon and parameters forthis node mE Modbus mode Max telegram length for reading holding regis Max telegram length for writing holding registers Max telegram length for reading input registers Max telegram length for reading discrete inputs Max telegram length for reading coils Max telegram length for writing coils Extra timeout for longer response time in msec Protocol Properties Increase telegram retries if driver generates frequent communication alarms Normally 3 telegram retries are Tegn te pr a la For Help press Fl NUM A Each PLC node requires a few fundamental parameters IGSS node number This is the node number which IGSS uses to reference a unique PLC This node number is required when binding and IGSS atom tag to a register in the PLC Any number from the drop down list can be used Modbus Unit ID This number corresponds to the Modbus ID of the PLC please note that C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbu
17. ion c togo documentation 7tmod 7tmod File Edit View Tools Help a Aaah SeHeMex Seung Configuration name 7tmod Connection Type Serial Port Remote EI a Documentation i 5 amp Modicon Modbus protocol dri Specify Type of Connection 3 CM Connect directly via the serial port Ba The PC and the PLC is directly connected via a serial cable Configure the serial port on the tab Serial Port Scheduled Connection The PC will only establish a connection with the PLC at Sy predetermined times and or with a fixed time interval The PC and the PLC are connected via a modem Select modem ID 0 GVC 33 6K dems Voice Speakerphone Modem F Advanced Conf Eh The PC and the PLC are connected directly or via equipment which does not require any special connection handling e g a radio modem Configure the serial port on the tab Serial Port Do not connect initially to all nodes when driver is started Alarm modem Only incoming calls Add one dummynode m r For Help press Fl NUM The Modicon Modbus Serial driver is designed to use either direct serial communications or modem radio and thus you should select one of the options e Connect directly via the serial port e Modem connection e Scheduled direct connect radio modem for instance The Connect directly via the serial port option is designed for permanent connection over a serial cable although
18. s serial driver many Modbus PLCs won t respond if requests are sent using a wrong Modbus ID Processor type Click this drop down box to select the PLC type see screenshot above STD Modbus GPRS are a generic Processor type and used in most cases the rest is for specific hardware C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver 3 2 CONFIGURING THE OBJECTS Once the driver and the PLC nodes have been defined IGSS Objects and Atoms can be linked to process variable in the PLC Various different types of PLC memory can be accessed for read write operations using the driver By using the Edit Mapping tab in the object properties dialog you can specify the binding between the object s atoms and the PLC process variables Start by selecting an atom and select the 7TMOD driver in the Driver drop down list Analogl Tacx Calculation Report Fomat Symbol Definition Analog Layers Data Management Definitions Display Edit Mapping Atom PLC Node for object Analog1 High Alarm Driver 7TMODGPRS Document High Limit Actual Value Node 0 b Set Point S low Limit PLC Address for Actual Value atom Low Alarm CJAlam In Data type Holding Register 3 16 1 0 mode i Offset Dec Alarm Details Offset Hex Bit Offset 0 e v Externaltype FP16S e Use numeric to scroll to next previous atom
19. time Connect at these times pzm e I Connect at fixed time intervals Time interval between connections minutes 0 CH Connection hold time Spefify how long time the connection should stay open for both connection types IV Normal connect hold time seconds 300 VW Send cmd connect hold time seconds 30 m i For Help press Fl INUM In the Connection Scheduling section you can design a connection schedule either by entering specific points in time during the day where the driver will establish connection or you can enter a fixed time interval where the driver will establish connection or a combination of both specific points in time and fixed intervals Based on this schedule the driver will connect to the PLC and read all configured data points i e all the tags you have defined in that node Once the driver have read all the data it will disconnect until the next scheduled connection Using this schedule dramatically reduces the amount of data on the wire but of course this comes at the price of not actually being connected continuously In the Connection hold time section you might want to specify how long the driver should keep C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver the connection open it either the user sends a command or if the user forces the driver to establish a connection through a dialup connection object The Normal
20. using something like MOXA over an ethernet internet connection is supported as well Both point to point and multi drop are supported Scheduled Connection Modem one or more nodes are connected to a modem the nodes are called at configurable times to retrieve current values alarms and possibly historic data Direct connection basically the same as regular direct connection except like modem connections connections are established at configurable time C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver For direct connections permanent or scheduled press the serial port tab E IGSS System Configuration c togo documentation 7tmod 7tmod File Edit View Tools Help i faa Sepp Seve Configuration name 7tmod Connection Type Serial Port Remote DS Documentation 28 Modicon Modbus protocol dri Serial Port Configuration M SC MI RM em G Configure the serial port by selecting the proper settings ZF below Select Communications port AACOM1 Serial Port Settings mag Set properties for the serial port Only properties which are configurable for se selected driver are available Baud Rate 5600 Data Bits 8 Stop Bits 1 Party None Flow Control Hardware 01010101000101010100010010011 m For Help press F1 NUM The driver supports up to 8 serial ports in point to point or multi drop configurations For each
21. y special connection handling e g a radio modem Configure the serial port on the tab Serial Port F Do not connect initially to all nodes when driver is started Alarm modem Only incoming calls Add one dummynode ala m d For Help press Fl NUM Select the modem you want to use for the connection in this case GVC 33 6K External Modem and continue to set up modem specific parameters by pressing the Configure button The options available in the Configure popup dialog differs among modem vendors but typically baud rate flow control additional AT modem commands compression and other hardware parameters can be set up using the Configure dialog Technical note The drivers modem interface uses Windows Telephone API TAPI which is a standard component of the Windows OS system Please make sure that you system has all latest updates for TAPI installed Advice Before deploying the driver it is advised that you test your modem connections manually using a terminal program to make sure you have compatible modems and to verify that the C USERS CMA DESKTOP DRIVER DOCS 7TMOD DOCX 7TMOD IGSS Modicon Modbus serial driver modem commands that TAPI is using by default works with your modem Setting up a radio connection is exactly the same as setting up a serial port Please refer to the DIRECT CONNECTION section above 3 1 ADDING A NODE Right click the
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