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MM2-M13 Series
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FreeWave MM2-M13 Series, MM2-M13-C, MM2-M13-C-SR, MM2-M13-LV-C, MM2-M13-T User's Reference Manual

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MM2-M13 Serial Radios
MM2-M13-C MM2-M13-C-SR
MM2-M13-LV-C MM2-M13-LV-T
MM2-M13-T MM2-M13-T-DEVKIT
Covering Firmware 7.79
User & Reference Manual
Part Number: LUM0021AA
Revision: Mar-2018
Safety Information
The products described in this manual can fail in a variety of modes due to misuse, age, or malfunction. Systems with these products must be designed to prevent personal injury and property damage during product operation and in the event of product failure.
Warning! Do not remove or insert cables while the circuit is live unless the area is known to be free of ignition concentrations of flammable gasses or vapors.
FreeWave Technologies, Inc. warrants the FreeWave® MM2-M13 Serial Radio (Product) that you have purchased against defects in materials and manufacturing for a period of two years from the date of shipment, depending on model number. In the event of a Product failure due to materials or workmanship, FreeWave will, at its discretion, repair or replace the Product. For evaluation of Warranty coverage, return the Product to FreeWave upon receiving a Return Material Authorization (RMA). The replacement product will remain under warranty for 90 days or the remainder of the original product warranty period, whichever is longer.
IN NO EVENT WILL FREEWAVE TECHNOLOGIES, INC., ITS SUPPLIERS, OR I TS LICENSORS BE LIABLE FOR ANY DAMAGES ARISING
FROM THE USE OF OR INABILITY TO USE THIS PRODUCT. THIS INCLUDES BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, INABILITY TO ACCESS OR SEND COMMUNICATION OR DATA, PERSONAL INJURY OR DAMAGE, OR OTHER LOSS WHICH MAY ARISE FROM THE USE OF THIS PRODUCT. THE WARRANTY IS EXCLUSIVE AND ALL OTHER WARRANTIES EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMI TED TO ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE ARE EXPRESSLY DISCLAIMED.
FreeWave’s Warranty does not apply in the following circumstances:
1. If Product repair, adjustments, or parts replacements are required due to accident, neglect, or undue physical, electrical, or electromagnetic stress.
2. If Product is used outside of FreeWave specifications as stated in the Product's data sheet.
3. If Product has been modified, repaired, or altered by Customer unless FreeWave specifically authorized such alterations in each instance in writing.
FreeWave Technologies, Inc.
5395 Pearl Parkway, Suite 100
Boulder, CO 80301
303.381.9200
Toll Free: 1.866.923.6168
Fax: 303.786.9948
Copyright © 2018 by FreeWave Technologies, Inc. All rights reserved.
www.freewave.com
This document is the property of FreeWave Technologies, Inc. and contains proprietary information owned by
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MM2-M13 Serial Radios: User & Reference Manual
Table Of Contents
Preface 7
1. Overview 9
2. Equipment 10
2.1. Included Equipment 10
2.1.1. User-supplied Equipment 10
2.2. Finding the Product Serial Number 10
3. Installation 11
3.1. Power Setup 12
3.2. Connections and Installation 13
3.2.1. Radio Setup Mode 14
3.2.2. Tera Term Activation 14
3.3. Choosing a Location for the Radio 17
4. Upgrading Serial Firmware Using a Direct Connection 18
5. Basic Radio Programming and Setup 21
5.1. Choosing Point-to-Point or Point-to-Multipoint Operation 22
5.1.1. Point-to-Point Network 22
5.1.2. Point-to-Multipoint Network 22
5.1.3. Examples of Data Communication Links 23
Point-to-Point Link 23
Point-to-Point Link with Repeater 23
Two Repeaters between the Master and Slave 24
Master Calls Slaves at Different Times 24
Standard Point-to-Multipoint Network 25
Point-to-Multipoint Network with a Multipoint Slave/Repeater 26
Standard TDMA Network 26
5.2. Define the Radio's Role in the Network and the Network Type 27
5.3. Establishing Communication with Instrumentation and Computers 30
5.3.1. Baud Rate 30
5.3.2. Data, Parity 30
5.3.3. Flow Control 31
5.3.4. Modbus RTU 31
5.3.5. RS422 / RS485 (Serial Interface) 32
5.3.6. Setup Port 33
5.3.7. Turn Off Delay 34
5.3.8. Turn On Delay 34
5.3.9. Use Break to Access Setup 34
5.4. Establishing Communication with Other Radios in the Network 35
5.4.1. Golden Settings 36
LUM0021AA Rev Mar-2018 Page 3 of 119
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5.5. Setting RF Transmission Characteristics 36
5.5.1. Frequency Key in 1.3GHz Radios 37
5.5.2. Frequency Zone (3) 38
5.5.3. High Noise (A) 40
5.5.4. Hop Freq Offset (2) 40
5.5.5. Hop Table Size (1) 40
5.5.6. Hop Table Version (0) 41
5.5.7. Lowpower Mode (9) 41
5.5.8. Max Packet Size (1) and Min Packet Size (2) 43
Minimum Packet Size Definition Table 43
Maximum Packet Size Definition with RF Date Rate of 2 43
Maximum Packet Size Definition with RF Date Rate of 3 44
5.5.9. MCU Speed (B) 45
5.5.10. Remote LED (C) 45
5.5.11. Retry Time Out (8) 45
5.5.12. RF Data Rate (4) 46
5.5.13. RF Xmit Power (5) 47
5.5.14. RTS to CTS (7) 47
5.5.15. Single Freq (4) 49
5.5.16. Slave Security (6) 49
5.5.17. Xmit Rate (3) 50
6. Configuring Point-to-MultiPoint Networks 51
6.1. Point-to-MultiPoint Network Characteristics 52
6.1.1. Golden Settings 52
6.1.2. Master-to-Slave Communications 52
6.1.3. Slave-to-Master Communications 52
6.2. Quick Start on a Point-to-Multipoint Network 53
6.3. Point-to-MultiPoint Operation LEDs 55
6.4. Overlapping Multipoint Networks 56
6.5. Establishing Communication with Other Radios in a Multipoint Network 56
6.5.1. Using the Network ID in Multipoint Networks 56
6.5.2. Using Call Book in Multipoint Networks 57
6.5.3. Programming Point-to-Multipoint Extended Call Book 58
6.6. Routing Communications through the Network 59
6.6.1. Assigning Subnet ID Values 59
Example 1: Subnet and Specific Path Communication 60
Example 2: Subnet and Communication Required through Repeaters 61
Example 3: Subnet and Optional Slave Communication 62
6.7. Setting Other Multipoint Parameters 63
6.7.1. 1 PPS Enable/Delay (9) 63
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MM2-M13 Serial Radios: User & Reference Manual
Setup 1PPS Enable/Delay 63
Calibrate a Slave Radio in 1PPS Enable/Delay Mode 63
6.7.2. Diagnostics (B) 64
6.7.3. DTR Connect (4) 64
6.7.4. Local Access (E) 65
6.7.5. Master Packet Repeat (1) 66
6.7.6. Master Packet Repeat in Multipoint Networks with Repeaters 67
6.7.7. Max Slave Retry (2) 67
6.7.8. MultiMasterSync (8) 67
6.7.9. Network ID (6) 68
6.7.10. Number Repeaters (0) 68
6.7.11. Radio ID (D) 69
6.7.12. Radio Name (G) 69
6.7.13. Repeater Frequency (5) 70
6.7.14. Retry Odds (3) 70
6.7.15. Slave/Repeater (A) 71
6.7.16. Subnet ID (C) 72
6.8. Conserving Power 73
6.8.1. Low Power Mode 74
7. Configuring Point-to-Point Networks 77
7.1. Quick Start on a Point-to-Point Network 77
7.2. Point-to-Point Operation LEDs 80
7.3. Using Call Book in Point-to-Point Networks 81
7.3.1. Programming Point-To-Point Extended Call Book to Use Three or Four Repeaters 82
8. Advanced Programming 83
8.1. Working with Parallel Repeaters 84
8.1.1. Repeaters Data Transmitted on the Same Frequency Key 84
8.1.2. Adding a Repeater to the Network 85
8.2. Setting and Changing Radio Passwords 86
8.2.1. Setting the Password 86
8.2.2. Changing a Password 86
8.2.3. Disable a Password 87
8.3. Enable and Set Up AES Encryption 87
8.3.1. Encryption Channel Key 88
8.3.2. Encryption Key 89
8.3.3. Encryption (Strength) 91
8.3.4. Troubleshooting AES Setup 91
8.4. Low Baud Rates 92
8.5. Multi-Master Synch 92
8.6. Time Divisible Multiple Access (TDMA) 92
LUM0021AA Rev Mar-2018 Page 5 of 119
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9. Viewing Radio Statistics 93
9.1. Antenna Reflected Power 94
9.2. Master-Slave Distance 94
9.3. Noise Level 94
9.4. Number of Disconnects 94
9.5. Radio Temperature 94
9.6. Rate % 95
9.7. Signal 95
9.8. Transmit Current (mA) 95
10. Troubleshooting 96
10.1. Troubleshooting Flowchart 99
11. MM2-M13 - Serial Radios Release Notes 100
11.1. Version 7.79 100
11.2. Version 7.78 102
11.3. Version 7.77 102
11.4. Version 7.70j 102
11.5. Version 7.70i (Initial Release) 102
12. Additional Radio Information 103
12.1. Operational RS422 and RS485 Information 103
12.1.1. RS485 Half Duplex Pin-Outs 104
12.2. RS232 Pin Assignments (DB-9) 104
12.3. Board Level Pinout 105
12.4. MM2-M13 Serial Radio Pinout 106
Appendix A: Technical Specifications 108
Appendix B: MM2-M13-C and -LV-C Mechanical Drawing 110
Appendix C: MM2-M13-T and -LV-T Mechanical Drawing 111
Appendix D: Factory Default Settings 112
Appendix E: Single Frequency Setting 114
Appendix F: FreeWave Legal Information 117
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MM2-M13 Serial Radios: User & Reference Manual

Preface

Contact FreeWave Technical Support
For up-to-date troubleshooting information, check the Support page at www.freewave.com.
FreeWave provides technical support Monday through Friday, 8:00 AM to 5:00 PM Mountain Time (GMT -7).
l Call toll-free at 1.866.923.6168.
l In Colorado, call 303.381.9200.
l Contact us through e-mail at moreinfo@freewave.com.
Document Styles
This document uses these styles:
l Parameter setting text appears as: [Page=radioSettings]
l File names appear as: configuration.cfg.
l File paths appear as: C:\Program Files (x86)\FreeWave Technologies.
l User-entered text appears as: xxxxxxxxx.
Caution: Indicates a situation that MAY cause damage to personnel, the radio, data, or network.
Example: Provides example information of the related text.
FREEWAVE Recommends: Identifies FreeWave recommendation information.
LUM0021AA Rev Mar-2018 Page 7 of 119
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Preface
<Parameter Name>
Setting Description
Default Setting: The factory default setting for the parameter.
Options: The options the parameter can be set to.
Terminal Menu: The menu path and field name to access the parameter using the terminal menus
available through the serial port.
Description: A description of what the parameter is and how it applies to the radio in the
network.
Important!: Provides crucial information relevant to the text or procedure.
Note: Emphasis of specific information relevant to the text or procedure.
Provides time saving or informative suggestions about using the product.
Warning! Indicates a situation that WILL cause damage to personnel, the radio, data, or network.
Printing this Document
This document is set to print double-sided with a front cover and a back cover. Viewing this document online with a PDF viewer, may show pages intentionally left blank to accommodate the double-sided printing.
Documentation Feedback
Send comments or questions about this document's content to techpubs@freewave.com. In the email, include the title of the document or the document's part number and revision letter (found in the footer).
Parameter Preference
The Parameter Preference table describes the available parameters.
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MM2-M13 Serial Radios: User & Reference Manual

1. Overview

FreeWave serial radios are DCE (Data Communications Equipment) radios that operate in virtually any environment where data communications occur. The radios act as data transmission devices, duplicating data in either Point-to-Point or Point-To-Multipoint mode.
This document includes:
l A basic introduction to the radio and how to determine the mode you want to run it in.
l Examples of how FreeWave radios can exist in a network with other radios.
l How to access the setup parameters available on the radio.
l Basic radio programming and setup information that applies to all network types.
l Considerations and quick starts for network design, including charts of LED displays.
l Details about defining a Multipoint network including the use of subnet IDs to route
information through the network.
l Steps to view statistics about a radio's performance.
l Pinouts and mechanical drawings.
LUM0021AA Rev Mar-2018 Page 9 of 119
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MM2-M13 Serial Radios: User & Reference Manual
Included Equipment
Qty Description
1 MM2-M13 Serial Radio

2. Equipment

2.1. Included Equipment

This is the equipment included with the MM2-M13 Serial Radio device:

2.1.1. User-supplied Equipment

l DC power source
l Serial and power cable

2.2. Finding the Product Serial Number

Each FreeWave radio is assigned a unique serial number. When contacting FreeWave Technical Support, this serial number is asked for from the radio you are calling about.
The serial number is three digits, followed by a hyphen and four digits (e.g., 111-1111) and is printed on the FreeWave label on the radio.
LUM0021AA Rev Mar-2018 Page 10 of 119
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MM2-M13 Serial Radios: User & Reference Manual

3. Installation

l Power Setup (on page 12)
l Connections and Installation (on page 13)
l Radio Setup Mode (on page 14)
l Tera Term Activation (on page 14)
LUM0021AA Rev Mar-2018 Page 11 of 119
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3. Installation

3.1. Power Setup

Connect the MM2-M13 Serial Radio to a positive power supply with +8.0 to +30.0 VDC, typically +12.0 VDC.
l The MM2-M13 Serial Radio is approved to operate with a positive power supply / input
voltage range of +8.0 to +30.0 VDC (+5 VDC LV models only).
l See the Technical Specifications (on page 108) for additional information.
FREEWAVE Recommends: For guaranteed performance, use between +8.0 to +30.0 VDC to power the radio. A dedicated power supply line is preferred. The power supply used MUST provide more current than the amount of current drain listed in the specifications for the product and voltage.
Warning! If the power supply line runs outside the enclosure, use electrostatic discharge (ESD) protectors to protect the radio from electric shock and transient voltage suppressors (TVS) to protect from an over-voltage situation.
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MM2-M13 Serial Radios: User & Reference Manual

3.2. Connections and Installation

Figure 1: MM2-M13 Serial Radio Connections
LUM0021AA Rev Mar-2018 Page 13 of 119
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3. Installation

3.2.1. Radio Setup Mode

l To read the current settings from or to program a radio, the radio must be in Setup mode.
l When a radio is in Setup mode, all three LEDs appear solid green .
OEM boards may also enter Setup when Pin 2 on the 14-pin connector is grounded or when using a break command.
Note: For Setup mode troubleshooting information, see Troubleshooting (on page 96).

3.2.2. Tera Term Activation

Note: This procedure is for a MM2-M13 Serial Radio interfaced to a computer.
If interfaced to a device other than a computer, some of these procedure steps may not be used.
Note: This procedure provides a Tera Term terminal connection to the MM2-M13 Serial Radio CLI. Other terminal emulators (e.g., HyperTerminal, PuTTY) may be used. The images in this procedure are for Windows® 7 and/or Firefox®. The dialog boxes and windows appear differently on each computer.
1. On the computer connected to the MM2-M13 Serial Radio, open a terminal program (e.g., Tera Term http://ttssh2.osdn.jp/).
2. In Tera Term, on the File menu, select New Connection.
Figure 2: File menu > New Connection
The Tera Term New Connection dialog box opens.
3. Click the Port list box arrow and select the COM port the MM2-M13 Serial Radio device is connected to.
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MM2-M13 Serial Radios: User & Reference Manual
Figure 3: Select the COM port
Important!: The Port assignment varies from computer to computer.
4. Click OK to save the changes and close the dialog box. The Tera Term window shows the connected COM port and Baud rate in the title bar of the window.
5. In the Tera Term window, click the Setup menu and select Serial Port.
Figure 4: Serial menu > Setup Port
The Tera Term: Serial Port Setup dialog box opens with the default MM2-M13 Serial Radio settings.
6. Verify, and change if required, the Tera Term serial port settings (except the Port setting) of the connected MM2-M13 Serial Radio so the settings are the same as the defaults shown in
Figure 5.
LUM0021AA Rev Mar-2018 Page 15 of 119
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3. Installation
Figure 5: Tera Term: Serial Port Setup dialog box with Default Settings
7. Verify the COM port settings are:
Baud Rate: 19200 Data: 8 bit Parity: none Stop: 1 bit
8. Click OK to save the changes and close the dialog box.
9. 9. Place the radio in Setup mode. When a radio is in Setup mode, all three LEDs appear solid green .
OEM boards may also enter Setup when Pin 2 on the 14-pin connector is grounded or when using a break command.
The Tera Term window refreshes showing the MM2-M13 Serial Radio default Menu Options. (Figure 6)
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MM2-M13 Serial Radios: User & Reference Manual
Figure 6: The MM2-M13 Serial Radio Default Menu Options
10. Continue with: Upgrading Serial Firmware Using a Direct Connection (on page 18)

3.3. Choosing a Location for the Radio

When embedding a radio, proper shielding form other electronics and radiated signals should be accounted for to ensure that they do not interfere with the performance of the radio or that the radio does not interfere with the performance of the other electronic devices.
LUM0021AA Rev Mar-2018 Page 17 of 119
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MM2-M13 Serial Radios: User & Reference Manual

4. Upgrading Serial Firmware Using a Direct Connection

This is a firmware upgrade with a direct connection using the firmware executable file (.exe).
Note: Contact FreeWave Technical Support (on page 7) to get the latest firmware upgrade file.
l Firmware update files are also available from FreeWave Technical Support.
l For information about upgrading firmware over the air, see Application Note #5440
(available at http://support.freewave.com/).
l Registration is required to use this login.
FREEWAVE Recommends: Use USB-to-serial cables that include the FTDI Chip Set to shorten the upgrade time. This inclusion is listed on the cable's packaging. For more information, see the Application Note #5471, Optimizing Firmware Upgrade Speed While Using a USB-Serial Adaptor available at http://support.freewave.com/. Registration is required to use this login.
LUM0021AA Rev Mar-2018 Page 18 of 119
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4. Upgrading Serial Firmware Using a Direct Connection
Procedure
Important!: Prior to starting the installation process, verify the Diagnostics parameter in the
MultiPoint parameters menu is set to 0.
1. Contact FreeWave Technical Support (on page 7) to get the latest firmware upgrade file.
2. With the radio connected to the computer, double-click the .exe file to launch the upload file.
Figure 7: Upload window
3. Verify the COM port settings match the COM port the radio is connected to.
Important!: This program does not work with COM port numbers higher than 2.
Figure 8: COM port settings
Important!: The baud rate must be set to 19200.
Note: If the settings do not match, press 3 in the utility, update the settings, and return to the
main menu.
4. Type 1 to begin the upgrade process.
5. If the radio is connected to the computer using a diagnostics cable, enter Y at the Enter Y for Diag Port prompt and press <Enter>. If the radio is connected to the computer using a data cable, enter N and press <Enter>.
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MM2-M13 Serial Radios: User & Reference Manual
6. When all three LEDs on the radio are solid green ( ), at the Radio in Setup prompt, type Y and press <Enter>.
Important!: If all three LEDs are NOT solid green, the radio is NOT in Setup mode.
Do one of the following to enter Setup mode:
Enclosed models: press the Setup button on the back of the device. Board-level models using a data cable, press the Setup button on the cable.
7. At the High Speed Download prompt, Type Y if using the Diagnostic port or Type N if fusing the Data port and press <Enter>.
The upgrade process starts.
If the process pauses before it is complete, press <Enter> to restart the process.
When the utility shows the Program Time, the process is complete.
Figure 9: Program Time
8. Press any key to return the main menu.
9. At the main menu, type 2 and place the radio in Setup mode. The new firmware version number appears at the top of the Setup main menu.
10. Type Q to return to the utility’s main menu. Press <Esc> to exit.
LUM0021AA Rev Mar-2018 Page 20 of 119
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MM2-M13 Serial Radios: User & Reference Manual

5. Basic Radio Programming and Setup

When the network is setup, either as a Point-to-MultiPoint or a Point-to-Point network, the process for setting up and programming a radio is the same. This section describes the aspects of programming and setting up a radio.
l Define the Radio's Role in the Network and the Network Type (on page 27)
l Establishing Communication with Instrumentation and Computers (on page 30)
l Establishing Communication with Other Radios in the Network (on page 35)
l Setting RF Transmission Characteristics (on page 36)
LUM0021AA Rev Mar-2018 Page 21 of 119
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5. Basic Radio Programming and Setup

5.1. Choosing Point-to-Point or Point-to-Multipoint Operation

5.1.1. Point-to-Point Network

A Point-to-Point network is best when the network has one Master and one Slave radio.
l A maximum of four Repeaters can be added to extend the reach of the network.
l All packets are acknowledged, whether sent from the Master to the Slave or from the Slave
to the Master.
l Adding Repeaters to a network cuts the data throughput by 50% and decreases overall
network capacity by 50%.

5.1.2. Point-to-Multipoint Network

In a Point-to-Multipoint network (also referred to as Multipoint network) the Master radio is able to simultaneously communicate with numerous Slave radios.
l In its simplest form, a Multipoint network functions with the Master broadcasting its
messages to all Slave radios.
l The number of times outbound packets from the Master or Repeater to the Slave or other
Repeaters are sent is determined by the user.
l The receiving radio, Slave or Repeater, accepts the first packet received that passes the
32-bit CRC.
l Packets are not acknowledged by the receiving radio, Slave or Repeater.
l When granted by the Master, the Slave radios respond to the Master when given data by
the device connected to the Data port.
l All packets sent are acknowledged or retransmitted until they are acknowledged.
l The number of times a packet is sent to the Master is determined by the user.
l The network can be extended with as many Repeaters as is required.
l Adding Repeaters to a network cuts the data throughput by 50% and decreases overall
network capacity by 50%.
Traditionally, a Multipoint network is used where data is collected from many devices and reported back to one central site. The architecture of this network is different from Point-to-Point applications. These parameters influence the number of radios that can exist in a Multipoint network:
l Data Block Size. The longer the data blocks, the fewer number of deployed Slave radios
can exist in the network.
l Baud Rate. The data rate between the radio and the device to which it is connected could
limit the amount of data and the number of radios that can exist in a network.
l Contention: The amount of contention between Slave radios. Polled Slave radios
versus vs. timed Slave radios.
l Repeaters. Adding Repeaters to a network cuts the data throughput by 50% and
decreases overall network capacity by 50%.
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MM2-M13 Serial Radios: User & Reference Manual
Example: If the network polls once a day to retrieve sparse data, several hundred Slave radios could be configured to a single Master. However, if each Slave transmits larger amounts of data or data more frequently, fewer Slave radios can link to the Master while receiving the same network performance. When larger amounts of data are sent more frequently, the overall network bandwidth is closer to capacity with fewerSlave radios.

5.1.3. Examples of Data Communication Links

FreeWave radios versatility allows data communication links to be established using a variety of different configurations.
l Point-to-Point Link (on page 23)
l Point-to-Point Link with Repeater (on page 23)
l Two Repeaters between the Master and Slave (on page 24)
l Master Calls Slaves at Different Times (on page 24)
l Standard Point-to-Multipoint Network (on page 25)
l Point-to-Multipoint Network with a Multipoint Slave/Repeater (on page 26)
Point-to-Point Link
Figure 10 shows the most common and straightforward link, a Master communicating to a Slave in
a Point-to-Point link.
Figure 10: Point-to-Point Link
Point-to-Point Link with Repeater
Figure 11 shows how a link might be set up using a repeater.
l If a Repeater is located on a hilltop or other elevated structure, it can enhance the link from
the Master to the Slave.
l In this configuration, it is desirable to use an Omni-directional antenna at the Repeater.
l Yagi antennas may be used at both the Master and Slave radios to increase the range of
the link.
Note: Adding Repeaters to a network cuts the data throughput by 50% and decreases overall network capacity by 50%.
LUM0021AA Rev Mar-2018 Page 23 of 119
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5. Basic Radio Programming and Setup
Figure 11: Point-to-Point Link with Repeater
Two Repeaters between the Master and Slave
Figure 12 shows a link with two repeaters between the Master and Slave.
l With two Repeaters more flexibility in getting around obstacles and greater total range is
possible.
l In this configuration, it is desirable to use an Omni-directional antenna at the Repeater.
l Yagi antennas may be used at both the Master and Slave radios to increase the range of
the link.
Note: When two Repeaters are used, no further degradation in the data throughput of the link is experienced.
Figure 12: Two Repeaters between the Master and Slave
Master Calls Slaves at Different Times
Figure 13 shows a configuration where a Master routinely calls a number of Slaves at different
times.
l The Master is communicating with a radio designated as a Slave/Repeater that is
connected to a remote device.
l Since this device is placed in an elevated location, the radio can also be used as a repeater
when it is not used as a Slave.
l At any time the Master can call any of the Slaves, establish a connection, and send and
receive data.
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MM2-M13 Serial Radios: User & Reference Manual
Figure 13: Master Calls Slaves at Different Times
Standard Point-to-Multipoint Network
Figure 14 shows a standard Point-to-Multipoint network.
l From the Master, data is broadcast to all three Slaves, one of which receives it through a
Multipoint Repeater.
l The data is sent out of the serial port of each of the three Slaves.
Important!: The end device should be configured to interpret the serial message and act on it if
necessary.
Figure 14: Standard Point-to-Multipoint Network
LUM0021AA Rev Mar-2018 Page 25 of 119
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5. Basic Radio Programming and Setup
Point-to-Multipoint Network with a Multipoint Slave/Repeater
Figure 15 shows a Point-to-Multipoint network that uses one of the sites as a Slave/Repeater.
l This network functions in the same manner as a standard Multipoint network with
Repeaters.
l However, the number of radios can be reduced with the use of the Multipoint Slave feature.
l The Multipoint Slave allows communication to a device connected locally to the Multipoint
Slave’s serial port while also acting as a Repeater to pass messages between the Master and a Slave.
l When compared to the Multipoint Repeater, the Multipoint Slave can only pass messages
between the Master and the Slave.
l It is not capable of passing messages to a device locally connected to its serial port.
Figure 15: Point-to-Multipoint Network with a Multipoint Slave
Standard TDMA Network
Note: TDMA is an option available for the MM2-M13 Serial Radio.
l A standard TDMA network requires a Master and Slave.
l Dedicated time slots are allocated to the Master and each of the Slaves guaranteeing
specific transmission slots.
l Slaves can be configured to communicate directly with other Slave.
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MM2-M13 Serial Radios: User & Reference Manual
Operation Mode Description
Point-to-Point Master (0)
This mode designates the radio as the Master in Point-to-Point mode. The Master may call any or all Slaves designated in its Call Book.
In Point-to-Point mode the Master determines the setting used for most of the transmission characteristics, regardless of the settings in the Slaves and/or Repeaters.
The settings NOT determined by the Master are:
l Transmit Power
l Slave Security
l Retry Time Out
l Hop Table settings
A quick method of identifying a Master is to power the radio. Prior to establishing a link with a Slave, all three of the LEDs on the Master are solid red.
Point-to-Point Slave (1)
This mode designates the radio as a Slave in Point-to-Point mode.
l The Slave communicates with any Master in its Call Book either directly
or through a maximum of four Repeaters.
l When functioning as a Slave, the Entry to Call feature in the radio’s Call
Book is NOT operational.
l Set the Slave Security parameter to 1 to bypass the Call Book in the
Slave.
l For more information, see Slave Security (6) (on page 49).

5.2. Define the Radio's Role in the Network and the Network Type

On the Operation Mode menu, use the Modem Mode field to set the Modem Mode.
Note: These settings are available in the Operation Mode menu in the terminal interface.
The Operation Mode option designates the method FreeWave radios use to communicate with each other. FreeWave radios operate in a Master to Slave configuration. Before the radios can operate together, they must be set up to properly communicate.
In a Point-to-Point configuration, Master or Slave mode may be used on either end of the communication link without performance degradation.
l When setting up the radio, remember that a number of parameters are controlled by the
settings in the Master.
l Therefore, deploying the Master on the communications end where it will be easier to
access is advised, but not necessary.
LUM0021AA Rev Mar-2018 Page 27 of 119
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5. Basic Radio Programming and Setup
Operation Mode Description
Point–to-MultiPoint Master (2)
This mode designates the radio as a Master in MultiPoint mode.
l This mode allows one Master radio to communicate simultaneously with
numerous Slaves and Repeaters.
l A Point-to-MultiPoint Master communicates only with other radios
designated as Point-to-MultiPoint Slaves or Point-to-MultiPoint Repeaters.
Point-to-MultiPoint Slave (3)
This mode designates the radio as a Slave in MultiPoint mode.
l This mode allows the Slave to communicate with a MultiPoint Master.
l The Slave may communicate with its Master through one or more
Repeaters.
Point-to-Point Slave/Repeater (4)
This mode designates the radio to act as EITHER a Slave or Repeater, depending on the instructions from the Master.
l The radio cannot act as both a Slave and a Repeater at the same time.
l True Slave / Repeater functionality is only available in a MultiPoint mode.
l Point-to-Point Slave / Repeaters have no security features.
l When a radio is designated a Point-to-Point Slave / Repeater, it allows
any Master to use it as a Repeater.
Point-to-Point Repeater (5)
FreeWave allows the use of a maximum of four Repeaters in a Point-to-Point communications link, significantly extending the operating range.
l When designated as a Repeater, a radio behaves as a pass-through link.
l All settings for the Call Book, Baud Rates, and transmission
characteristics are disabled.
l A Repeater connects with any Master that calls it.
l The Repeater must be set up properly in the Master's Call Book.
Point-to-Point Slave/Master Switchable (6)
Mode 6 allows the radio to be controlled entirely through software commands.
l A number of key parameters in the FreeWave user interface may be
changed either directly using a program such as Windows® Terminal or through the use of script files.
l Additionally, when the Point-to-Point Slave/Master Switchable option
is selected and the radio is not calling a Slave, it functions as a Slave and accepts any appropriate calls from other radios.
Note: For more information, see Application Note #5476, Mode 6 (available at http://support.freewave.com/).
Point-to-MultiPoint Repeater (7)
This option allows the radio to operate as a Repeater in a MultiPoint network.
l As many Repeaters as necessary are allowed in a MultiPoint network.
l If the Repeater is to act as a Slave / Repeater, set the Slave Repeater
parameter in the MultiPoint Parameters menu to Enabled.
FreeWave. This document cannot be reproduced in whole or in part by any means without written permission from
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MM2-M13 Serial Radios: User & Reference Manual
Operation Mode Description
Ethernet Options (F)
Note: This menu is only used for Ethernet radios. Although this menu is included here, it is not used in the MM2-M13 Serial Radio.
LUM0021AA Rev Mar-2018 Page 29 of 119
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5. Basic Radio Programming and Setup
Data, Parity
Setting Description
Default Setting: 0 (8, N, 1)
Options:
Option Data Bits Parity Stop Bits
0 8 None 1
1 7 Even 1
2 7 Odd 1
3 8 None 2
4 8 Even 1
5 8 Odd 1
Terminal Menu: (1) Set Baud Rate > (A) Data, Parity
Description: l Six data word length and parity configurations are available for use with
FreeWave radios.
l The default setting is 8-None-1 and is the most commonly used serial
communications protocol.

5.3. Establishing Communication with Instrumentation and Computers

5.3.1. Baud Rate

The Baud Rate menu establishes the communications settings between the radio and the device or computer it is connected to (radio serial port to the device).
Example: A pair of radios may be used in an application to send data from remote process instrumentation to an engineer's computer. In this use, the Baud Rate for the radio on the instrumentation might be set to 9600 and the radio on the polling host might be set to 57,600.
1. On the Main Menu, type 1. The Set Baud Rate menu opens.
2. Enter a value between 0 and 9 to set the Baud Rate.
Note: 0 = Baud Rate of 230 and 9 = 1,200. This applies to all types of networks.
Important!: This setting is independent of the Baud Rate for any other radios in the network.

5.3.2. Data, Parity

When Data, Parity is selected from the Baud Rate menu, a prompt to enter a value appears.
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