AutomationDirect MDM-TEL Istruzioni per l'installazione e il funzionamento
ADC MDM-TEL Modem
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Last reviewed: 03/07/2002
Local
Modem
IBM Compatible Remote
Modem
PLC
Introduction
This document describes the techniques and procedures we have found to consistently connect a
PC running Directsoft32 to a AutomationDirect PLC through the ADC MDM-TEL modem. It
covers how to set up remote PLC programming and a PLC-to-PLC connection with a MDM-TEL.
The document also describes how to troubleshoot a MDM-TEL connection.
We are not suggesting that other techniques will not work, nor are we suggesting that other
modems will not work. There is no possible way for us to test every manufacturer’s modems and
find the settings and procedures to make those work.
Connecting the modem to the PLC
1. Recommended PLCs and ports to use
2. Cable Wiring
After assembling the proper hardware and cables, there are three phases to setting up the
connection: 1. Installing the windows modem driver
2. MDM-TEL Configuration
3. Direct Logic PLC Port Setup
This document also covers:
1. DirectSoft32 Setup for Remote PLC Programming
2. Troubleshooting a Modem Connection
3. Connecting two Direct Logic PLCs together through the MDM-TEL modem
4. PLC Network Instructions
It is our suggestion that you carefully follow this document first in attempting modem
communication with our PLCs. If this works, you can then try to achieve higher baud rates and
faster throughputs. Phone technology is the key to high performance. There will be some sites
that will not be able to achieve a higher baud rate or even a 9600 baud rate.
If following these steps does not get you connected, please refer to the troubleshooting steps at
the end of this document. If this still does not get you connected, please call our tech support at
(770)844-4200. We will help you in whatever way we can. We would also welcome feedback if
you think that there is any other pertinent information that should be added to this document.
Recommended PLCs and ports to use:
Due to timing problems created by poor quality phone lines, old switches and many other
complications associated with telephone transmissions, we only recommend using the modems
on the “configurable ports” of our PLC’s. These include:
-D0-05 communication port 2
-D2-250 communication port 2
-D2-DCM
-D3-350 communication port 2
-D3-DCM
-D4-450 communications ports 1(RS232 25-pin connector) and 2(RJ-12 on top)
-D4-DCM
ADC MDM-TEL Modem
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Last reviewed: 03/07/2002
Local
Modem
IBM Compatible Remote
Modem
PLC
Cable Wiring
05 comm port 2 250 bottom port, 06 port 2 cable wiring
D2-DSCBL w/ D2-DSCBL-1 w/ null modem
null modem
D2/D4-DCM 350 bottom port cable wiring
D3-DSCBL-2 w/ D3-DSCBL-2 w/ null modem
null modem
450 bottom port 1450 top port 2(RJ-12)
D3-DSCBL-2 w/ D2-DSCBL w/ null modem
null modem
Windows Driver Configuration:
.
PLC Port 2 MODEM
15pin-SVGA DB9-Male
Male
TXD 2 ------ 3 TXD
RXD 3 ------ 2 RXD
GND 7 ------ 5 GND
RTS 5 -+ +- 7 RTS
| |
CTS 4 -+ +- 8 CTS
PLC Port 2 MODEM
RJ-12 DB9-Male
Female
TXD 4 ------ 3 TXD
RXD 3 ------ 2 RXD
GND 1 ------ 5 GND
+- 7 RTS
|
+- 8 CTS
MODEM
DB25 DB9-Male
Female
TXD 2 ------ 3 TXD
RXD 3 ------ 2 RXD
GND 7 ------ 5 GND
RTS 4 -+ +- 7 RTS
| |
CTS 5 -+ +- 8 CTS
MODEM
DB25 DB9-Male
Female
TXD 2 ------ 3 TXD
RXD 3 ------ 2 RXD
GND 7 ------ 5 GND
RTS 4 -+ +- 7 RTS
| |
CTS 5 -+ +- 8 CTS
MODEM
DB25 DB9-Male
Female
TXD 2 ------ 3 TXD
RXD 3 ------ 2 RXD
GND 7 ------ 5 GND
RTS 4 -+ +- 7 RTS
| |
CTS 5 -+ +- 8 CTS
PLC Port 2 MODEM
RJ-12 DB9-Male
Female
TXD 4 ------ 3 TXD
RXD 3 ------ 2 RXD
GND 1 ------ 5 GND
+- 7 RTS
|
+- 8 CTS
ADC MDM-TEL Modem
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Last reviewed: 03/07/2002
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Installing the Windows Modem Driver
Install the standard 28800 baud modem driver in Windows to use with the ADC modem.
Here is the procedure for installing this driver:
1. Go to Control Panel and choose Phone and Modem Options:
2. Choose the Modems tab and then click on Properties at the bottom:
ADC MDM-TEL Modem
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Last reviewed: 03/07/2002
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5. Make Port speed 9600 and choose None for Flow control:
5. Click on Advanced and choose 8 Data bits, None Parity and 1 Stop Bits:
Click OK until all dialog boxes are closed. This should setup your Windows driver so that
DirectSOFT can use the Windows TAPI control when accessing the modem.
ADC MDM-TEL Modem
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Modem
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MDM-TEL Configuration
The following steps show how to configure the modem for connectivity to the PLC using the
Software Configuration Wizard provided with the modem. Use the 9 pin serial cable to connect
between the serial port of your PC and the ADC modem in order to download the configuration. If
using an ADC modem on both local and remote CPU’s(which is the best possible scenario), use
the same settings for both.
1. Click on PLC Self-Dialing Modem or choose from the Open Configuration File for the saved
configurations. A 250 configuration that will work for all of our PLC’s is loaded when you
install the software:
2. Set this page up as shown below, then click on the Next button:
ADC MDM-TEL Modem
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3. Set this page up as shown below, then click on the Next button:
4. Set this page up as shown below (Be sure to disable Error Correction and Command Echo
and choose None for Flow Control, then click on the Next button:
ADC MDM-TEL Modem
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Last reviewed: 03/07/2002
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Modem
IBM Compatible Remote
Modem
PLC
Direct Logic PLC Port Setup
This setup shows a 250 bottom port setup. Other PLC setups will differ slightly but you should
follow the same parameters appropriately. Note: the DCM modules are not configured through
DirectSOFT. You must configure the DIP switches and selector switches for the proper setup on
these modules. Again, follow the same parameters guidelines from this example and refer to the
DCM manuals for the appropriate switch settings.
You must first connect to the programming port of the PLC. On the 250, this is the top port (RJ12
connector). Consult the DirectSOFT programming manual to find the steps necessary to install
the software and access the “Link Wizard”.
1. Click on PLC:
2. Choose Setup Secondary Comm Port from the Setup menu:
