Microhard Systems MHX-920 - Table of Contents

iii MHX-920 Operating Manual
Contents
1. Introduction
1.0 Product Overview .............................................................................................................................................................................. 1
1.1 Features.............................................................................................................................................................................................. 1
1.2 About this Manual ............................................................................................................................................................................. 2
2. Electrical/Physical
2.0 Functional Block Diagram................................................................................................................................................................. 3
2.1 Pinout................................................................................................................................................................................................. 4
2.2 LED Operation................................................................................................................................................................................... 6
2.3 DC Characteristics............................................................................................................................................................................. 8
2.4 AC Characteristics.............................................................................................................................................................................. 9
3. Modes of Operation ..................................................................................................................................................................................... 11
3.1 Data Mode ........................................................................................................................................................................................ 11
3.2 Command Mode ............................................................................................................................................................................... 12
3.2.1 AT Command Interface ....................................................................................................................................................... 13
3.3 Switching Between Command and Data Modes............................................................................................................................... 13
4. Configuration
4.1 Quick Start Approach ...................................................................................................................................................................... 15
4.2 AT Commands................................................................................................................................................................................. 16
A - Answer........................................................................................................................................................................................ 17
E - Command Echo.......................................................................................................................................................................... 17
I - Identification ............................................................................................................................................................................... 17
O - Online Mode.............................................................................................................................................................................. 17
Q - Quiet Mode................................................................................................................................................................................ 17
V - Result Codes Display................................................................................................................................................................. 17
W - Connection Result..................................................................................................................................................................... 18
Z - Reset Modem and load stored configuration.............................................................................................................................. 18
&C - DCD (Data Carrier Detect) ..................................................................................................................................................... 18
&D - DTR (Data Terminal Ready)................................................................................................................................................... 18
&F - Load Factory default configuration ......................................................................................................................................... 18
&K - Handshaking............................................................................................................................................................................ 18
&S - DSR (Data Set Ready)............................................................................................................................................................. 19
&V - View Configuration ................................................................................................................................................................. 19
&E - Framing Error Check................................................................................................................................................................ 19
&W - Write Configuration to memory............................................................................................................................................. 19
Sxxx? - Read S register value........................................................................................................................................................... 19
Sxxx=yyy - Set S register value ....................................................................................................................................................... 19
Command Result Codes................................................................................................................................................................... 20
4.3 S Registers ....................................................................................................................................................................................... 21
S Register 2 - Escape Code............................................................................................................................................................... 21
S Register 3 - CR Control Code....................................................................................................................................................... 21
S Register 4 - Linefeed Control Code .............................................................................................................................................. 21
S Register 5 - Backspace Control Code........................................................................................................................................... 21
S Register 101 - Operating Mode..................................................................................................................................................... 22
S Register 102 - Serial Baud Rate.................................................................................................................................................... 24
S Register 103 - Wireless Link Rate................................................................................................................................................ 24
S Register 104 - Network Address................................................................................................................................................... 25
S Register 105 - Unit Address.......................................................................................................................................................... 25
S Register 106 - Primary Hopping Pattern....................................................................................................................................... 25
S Register 206 - Secondary Hopping Pattern.................................................................................................................................... 25
S Register 107 - Encryption Key...................................................................................................................................................... 27
S Register 108 - Output Power Level............................................................................................................................................... 27
S Register 109 - Hopping Interval.................................................................................................................................................... 28
S Register 110 - Data Format............................................................................................................................................................ 29
S Register 111 - Packet Minimum Size ............................................................................................................................................ 29
S Register 112 - Packet Maximum Size............................................................................................................................................ 29
S Register 114 - Packet Size Control ................................................................................................................................................ 29
S Register 116 - Packet Character Timeout ...................................................................................................................................... 29
S Register 113 - Packet Retransmissions.......................................................................................................................................... 30
S Register 213 - Packet Retry Limit.................................................................................................................................................. 31
S Register 115 - Packet Repeat Interval........................................................................................................................................... 31
S Register 117 - Modbus Mode ........................................................................................................................................................ 32
S Register 118 - Roaming................................................................................................................................................................. 33
S Register 119 - Quick Enter to Command....................................................................................................................................... 33