Beijer Electronics QTERM-IV User manual

QTERM®-IV/P40
USER'SMANUAL
REVISION 10
BEIJER ELECTRONICS
2212 South West Temple #50
Salt Lake City, Utah 84115-2648
USA
Phone [phone]
Fax [phone]
Email [e-mail]
Web http://www.beijerelectronicsinc.com
M01-008-00 Rev 10

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9241E2 - Printed in USA
© Copyright Beijer Electronics 2011
QTERM, QTERM-IV, QTERM-P40, QCODE, QDATA, QSETUP and QDEMO are trademarks of Beijer Electronics.
Manual Updated 21 March 2011

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FCC COMPLIANCE STATEMENT
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device
may not cause harmful interference, and (2) this device must accept any interference received, including interference that
may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required
to correct the interference at his own expense.
Any modification to this device (including any changes to the recommended antenna configuration) that are not expressly
approved by Beijer Electronics could void the user's authority to operate this device.

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FOREWORD
The Beijer Electronics QTERM® is a data-entry terminal for industrial applications. There are two distinct QTERM models
covered in this manual; the QTERM-IV and the QTERM-P40. When the term QTERM is used in this manual, it refers to any
one of these models. When the manual is referring to one of these specific models, then it will be indicated. The QTERM is
available in many different configurations; this manual discusses all versions and their operation.
The notation ]in this manual always means the one-byte escape character (1Bh = 27 decimal).
This manual is written for Version 2.1 of the QTERM operation code. Be sure to read the file READ.ME on your distribution
disk for any changes due to newer versions of code.
The QTERM-IV and QTERM-P40 are CE certified products. They have been assessed against the requirements of EN
50082-1: 1992, EN 55022: 1987, and EN 60950 (including Amendments Nos. 1, 2, and 3). Based on conformity with these
requirements, the QTERM-IV and QTERM-P40 are deemed in compliance with all applicable CE directives.
The sections of this manual are as follows:
Chapter 1 Quick Start. If you wish to start using your QTERM immediately, this chapter will show you how to con-
nect to the terminal and how to run the example software.
Chapter 2 QTERM Software. This chapter provides a detailed listing of the QTERM commands and discusses how
to use them.
Chapter 3 Using The QDATA File. The QDATA file is used to configure the QTERM. This chapter shows you how
to modify the file and load it into your QTERM.
Chapter 4 QTERM Serial Modes. This chapter discusses the different communication modes available including
full-duplex, block serial and multidrop serial modes.
Chapter 5 QTERM-IV Hardware. This chapter discusses the hardware of the QTERM-IV, including dimensional
drawings, interface specifications, connector pin assignments, performance and environmental specifica-
tions.
Chapter 6 QTERM-P40 Hardware. This chapter discusses the hardware of the QTERM-P40, including dimensional
drawings, interface specifications, connector pin assignments, performance and environmental specifica-
tions.
Appendix A ASCII Chart. This is a true 7-bit ASCII chart, along with mnemonic definitions.
Appendix B QTERM Character Chart. This is a 256-character chart showing how the QTERM handles every charac-
ter it receives. The lower half is similar to, but not the same as, the true ASCII chart in Appendix A.
Appendix C QTERM Command Summary. This is an abbreviated summary of QTERM software commands.

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CHAPTER 1. QUICK START 1
1.1 Power-On Setup 1
1.2 Connect the Communications Lines 1
1.3 Apply Power 2
1.4 Communicate 2
1.5 Running QDEMO 2
1.6 Using the QTERM 2
CHAPTER 2. QTERM SOFTWARE 5
2.1 Operation 5
2.1.1 Handshaking 5
2.1.2 Commands vs. QDATA Parameters 5
2.1.3 User Data Memory Organization 5
2.2 Software Commands 6
2.2.1 Bell (^G) - 07h 7
2.2.2 Backspace (^H) - 08h 7
2.2.3 Horizontal Tab (^I) - 09h 7
2.2.4 Line Feed (^J) - 0Ah 7
2.2.5 Vertical Tab (^K) - 0Bh 7
2.2.6 Form Feed (^L) - 0Ch 7
2.2.7 Carriage Return (^M) - 0Dh 7
2.2.8 XON (^Q) - 11h 7
2.2.9 XOFF (^S) - 13h 7
2.2.10 Delete - 7FH 7
2.2.11 Cursor Up - ]A 7
2.2.12 Cursor Down - ]B 7
2.2.13 Cursor Right - ]C 7
2.2.14 Cursor Left - ]D 7
2.2.15 Clear Screen - ]E 7
2.2.16 Set Timeout Delay - ]F # 7
2.2.17 Set Tab Spacing - ]G # 8
2.2.18 Cursor Home - ]H 8
2.2.19 Set Cursor Position - ]I # * 8
2.2.20 Erase to End of Screen - ]J 8
2.2.21 Erase to End of Line - ]K 8
2.2.22 Set Contrast - ]L # 8
2.2.23 Reset QTERM - ]M 8
2.2.24 Query Version - ]N 8
2.2.25 Buzzer On/Off/Beep -]O # 8
2.2.26 LEDs On/Off/Blink/Toggle - ]P # 9
2.2.27 Insert/Replace Mode - ]Q # 9
2.2.28 Auto Wrap Mode - ]R # 9
2.2.29 Auto Scroll Mode - ]S # 9
2.2.30 Auto Line Feed Mode - ]T # 9
2.2.31 Display Off - ]U 9
2.2.32 Backlight On/Off/Toggle - ]V # 10
2.2.33 Query Status - ]W 10
2.2.34 Query Cursor Position - ]X 10
2.2.35 Query Character - ]Y 10
2.2.36 Scroll Down - ]Z 10
2.2.37 Key Click/Repeat Mode - ]a # 10
2.2.38 Set Cursor Mode - ]b # 10
2.2.39 Set Shift Mode - ]c # 10
2.2.40 Control dig0 and dig1 - ]d # 10
2.2.41 Set Buzzer Duration - ]e # 11

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2.2.42 Set Key Click Duration - ]f # 11
2.2.43 Set Key Repeat Rate - ]g # 11
2.2.44 Set LED Blink Rate - ]h # 11
2.2.45 Save Parameters to EEPROM - ]i 11
2.2.46 Auxiliary Serial Port Control - ]j # 11
2.2.47 Transmit Buffer Flush - ]k 12
2.2.48 XON/XOFF Mode - ]l # 12
2.2.49 User Area Read/Write - ]m # 12
2.2.50 Get Free User Area - ]n 12
2.2.51 User Area Page Control - ]o # 12
2.2.52 Macro String Execution - ]p # 13
2.2.53 Query Multidrop Buffer - ]q 13
CHAPTER 3. USING THE QDATA FILE 17
3.1 QDATA Files 17
3.2 Using QSETUP 17
3.2.1 Loading a QDATA File 18
3.2.2 Loading a QCODE File 18
3.2.3 Retrieving a QDATA File 18
3.3 Basic QDATA File Concepts 18
3.4 Parameter and Key String Sections 19
3.4.1 Parameter Section 19
3.4.2 Key String Section 19
3.4.3 Macros and Event Triggered Strings 20
3.5 Advanced QDATA File Concepts 20
3.5.1 String Terminology 20
3.5.2 String Concepts 21
3.5.3 String Definitions 21
3.5.4 String Examples 22
3.6 Custom Display Characters 22
CHAPTER 4. QTERM SERIAL MODES 25
4.1 Serial Modes 25
4.2 Full-Duplex Serial Mode 25
4.3 Block Serial Mode 25
4.3.1 Receiving Data from the Host 26
4.3.2 Response Packets 26
4.3.3 Transmitting Data to the Host and the Operation of EDIT Mode 26
4.3.4 EDIT Mode and the Use of Local and Host Data 27
4.3.5 Defining Editing Keys for the EDIT Buffer 27
4.3.6 The EOP Terminator and EDIT Mode 27
4.3.7 Received Commands Allowed in EDIT Mode 28
4.3.8 The Special Function Switch \S and EDIT Mode 28
4.3.9 Auxiliary Serial Port Operation 28
4.4 Multidrop Serial Mode 29
4.4.1 Multidrop Drivers and the Hardware Interface 29
4.4.1.1 Turn-Around Time 29
4.4.1.2 Network Biasing and Matching Resistors 29
4.4.2 Multidrop Data Packets 30
4.4.3 Receiving Data from the Host 30
4.4.4 Response Packets 30
4.4.5 Transmitting Data to the Host and the Operation of EDIT Mode 30
CHAPTER 5. QTERM-IV HARDWARE 33
5.1 Handheld QTERM-IV 33

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5.2 Battery Back QTERM-IV 33
5.3 Panel-Mount QTERM-IV 34
5.4 Interfaces 34
5.4.1 EIA-232 Interface 34
5.4.2 EIA-422 Interface 34
5.4.3 5-volt Buffered Interface 35
5.5 Other QTERM-IV Hardware 35
5.5.1 Display 35
5.5.2 Keypad 36
5.5.3 Digital Outputs, dig0 and dig1 36
5.5.4 Buzzer 36
5.5.5 Regulator Option 36
5.5.6 Auxiliary Serial Port Option 37
5.5.7 The EEPROM Disable Jumper 37
5.5.8 Adding Another PC Board 37
5.6 QTERM-IV Specifications 37
CHAPTER 6. QTERM-P40 HARDWARE 41
6.1 Panel-Mount QTERM-P40 41
6.2 Interfaces 41
6.2.1 EIA-232 Interface 41
6.2.2 EIA-422 Interface 42
6.2.3 5-volt Buffered Interface 42
6.3 Other QTERM-P40 Hardware 43
6.3.1 Display 43
6.3.2 Keypad 43
6.3.3 Digital Outputs, dig0 and dig1 44
6.3.4 Buzzer 44
6.3.5 Regulator Operation 44
6.3.6 Auxiliary Serial Port Option 44
6.3.7 The EEPROM Disable Jumper 44
6.3.8 The Emergency Stop Switch 45
6.4 QTERM-P40 Specifications 45
APPENDIX A. ASCII CHART 47
APPENDIX B. 47
APPENDIX C. QTERM CHARACTER CHART 49
APPENDIX D. QTERM COMMAND SUMMARY 51

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CHAPTER 1.
QUICK START
There are only four steps required to communicate with the
QTERM:
•use Power-On Setup to set the contrast, baud rate, data
format and serial mode
•connect to your host transmit, receive and ground lines
•apply power
•transmit and receive with the QTERM
1.1 Power-On Setup
The Power-On Setup procedure is used to configure the
QTERM's display contrast, baud rate, data format and serial
mode. You use three different QTERM keys to do this con-
figuration (see Figure 1-1):
For the QTERM-IV:
Top - Right: this is the up key
Top - 2nd from Right: this is the down key
Top - 3rd from Right: this is the save key
For the QTERM-P40:
Left - Top: this is the up key
Left - 2nd from Top: this is the down key
Left - 3rd from Top: this is the save key
To perform the Power-On Setup follow these steps:
•Hold down any key and apply power to the QTERM
(you do not need to connect the transmit and receive
lines).
•The version of software in the QTERM will be dis-
played as long as you hold down the key, after which
the you can adjust the display contrast.
•Set the desired display contrast using the up and down
keys. When the display is at a contrast you like, press
the save key.
•Set the desired baud rate (see Table 1-1) using the up
and down keys. When the desired baud rate is dis-
played, press the save key.
•Set the desired data format (see Table 1-1) using the
up and down keys. When the desired data format is
displayed, press the save key.
•Set the desired serial mode (see Table 1-1) using the
up and down keys. When the desired serial mode is
displayed, press the save key.
Disconnect power and go to the next step.
1.2 Connect the Communications Lines
The EIA-232 and 5-volt Buffered have one transmit and
one receive line, while the EIA-422 has two transmit and
two receive lines.
!
QTERM-P40
QTERM-IV
Figure 1-1. Power-On Setup Key Assignments.

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Table 1-2 shows the connector pin assignments for both the
handheld and panel-mount QTERMs. The receive and
transmit directions shown in the table are with respect to
the QTERM. Refer to this table to connect your host com-
munications lines to the correct pins. Do not connect to the
dig0 and dig1 pins; Chapter 2 discusses these pins and their
uses.
(If you are using an IBM-style PC, you cannot connect an
EIA-422 or 5-volt Buffered QTERM directly to the com-
puter's COM port; you must provide an interface device.)
1.3 Apply Power
Table 1-2 shows the pin assignments for the power and
ground lines. Connect your DC power supply to the appro-
priate two pins.
WARNING: Power supplied to the QTERM-IV/P40 must
be from an SELV power source, and should have a current
limit on its output of 5 Amperes. If you did not order the
regulator option, the supply must provide a minimum of
4.75 volts DC and be limited to a maximum of 5.25 volts
DC. If you did order the regulator option, the supply must
provide a minimum of 5.5 volts DC and be limited to a
maximum of 24 volts DC. Limiting may be inherent to the
supply, or may be provided by supplementary overcurrent
devices. If the QTERM does not respond,
or exhibits abnormal behavior on power
up, disconnect power and contact Beijer
Electronics for technical support. If you
have a QTERM-P40, then you can switch
the regulator in or out; see Chapter 6 for
information on setting the dip switches.
If you ordered the battery back option, you do not need to
connect a power supply; just install six alkaline AA batter-
ies in the battery compartment.
1.4 Communicate
At this point, characters which are transmitted by the host
will be displayed on the QTERM display. If you press keys
on the keypad, the QTERM will transmit the appropriate
codes to the host computer.
1.5 Running QDEMO
To easily use some of the advanced features of the
QTERM, run the QDEMO program that is included with
this User's Manual:
•Connect your QTERM to either the COM1 or COM2
serial port on an IBM-style PC.
(If you have an EIA-422 or 5-volt Buffered QTERM,
you will need to provide an interface unit such as
Beijer Electronics' QCOM-2; you cannot directly con-
nect a QTERM with one of these interfaces to the
COM port on an IBM-style computer!)
•Copy the file QDEMO.EXE to your hard disk.
•Apply power to the QTERM.
•Run the QDEMO program.
•Follow the on-screen instructions to use many of the
features of the QTERM terminal.
QDEMO will allow you to exercise many of the features of
the QTERM. It includes a terminal emulator so that you can
also communicate directly with the terminal.
1.6 Using the QTERM
There are three ways to “customize” the operation of the
QTERM for your application:
•Power-On Setup
To set the display contrast, baud rate, data format and
serial mode, see the beginning of this chapter.
•Software Commands
If you want to send commands from your host com-
puter to the QTERM, see Chapter 2 for a list of all
commands and details on how to use them.
Table 1-1: Power-on Setup Options.
Available Baud Rates
9600, 4800, 2400, 1200,
600, 300, 150
Available Data Formats*
8n1, 8e1, 8o1, 8n2, 8e2, 8o2,
7n1, 7e1, 7o1, 7n2, 7e2, 7o2
Available Serial Modes
fdplx = Full Duplex, Block, mdrop = Multidrop
Available Addresses for Multidrop Mode
Between 01 and 99
*format is: data-parity stop

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Some of the commands allow you to control the dis-
play (such as cursor movement, clear screen and line
feed), others control operation of the hardware (such
as LED control and key click control) and others con-
trol external devices (Auxiliary Serial Port control and
digital output control).
•QDATA File Download
All configurable parameters of the QTERM can be
controlled using software commands or by setting the
proper values in the QDATA file and downloading it
into the QTERM.
The only way to modify the key strings (i.e. what the
QTERM transmits when a key is pressed), or to mod-
ify the eight custom characters, is by modifying and
downloading the QDATA file.
Chapter 3 shows how to modify this file and how to
load it into your QTERM. There are also several
examples that utilize the powerful capabilities of key
strings.
Table 1-2: QTERM Pin Assignments.
6-pin
Modular DB9 Female Panel-mount 2 mm
10-pin
Terminal
Strip
QTERM
232/5-volt
Buffered
Function
QTERM
422
Function
QTERM
485
Function
1 3 1 4 receive +receive dig0*
2 6 2 5 dig1* -receive dig1*
3 2 3 6 transmit +transmit RTx+
4 1 4 7 dig0* -transmit RTx-
5958+V†+V†+V†
6 5 6 9 ground ground ground
- n/a - 1 E-stop N.O. E-stop N.O. E-stop N.O.
- 8 - 2 E-stop com. E-stop com. E-stop com.
- 7 - 3 E-stop N.C. E-stop N.C. E-stop N.C.
Tx and Rx directions are with respect to the QTERM
*these lines are optional; see section 5.5.3 and section 6.3.3
†no connection with battery back units

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CHAPTER 2.
QTERM SOFTWARE
2.1 Operation
The operation of the QTERM is quite simple:
•Power is applied to the QTERM.
•Commands or data can be transmitted to the QTERM.
Commands are executed as required; data is displayed.
•When a key is pressed, the QTERM transmits the
appropriate character(s) to the host.
The QTERM has many additional capabilities which are
accessed in three ways:
•Power-On Setup (see Chapter 1)
•Software commands from host (this chapter)
•Configuration-file download (see Chapter 3)
2.1.1 Handshaking
The QTERM has buffers for both receiving and transmit-
ting characters. However, these buffers may not be large
enough for some applications. If this is the case for your
application, then your host must use XON/XOFF hand-
shaking to make optimal use of the QTERM's capabilities.
The QTERM's transmit buffer (16 bytes long) is used when
a host does not wish to receive characters for a period of
time. The host sends an XOFF character to the QTERM.
The QTERM starts placing keycodes (one character per
keystroke, regardless of how many characters are in the
string assigned to the key) into the transmit buffer rather
than transmitting them. When the host is ready to receive
characters, it sends an XON character, at which time the
QTERM will start transmitting the characters in the buffer.
The QTERM's receive buffer is large enough to accept a
full screen of text at the maximum baud rate (9600) without
overrunning the buffer. However, some operations can take
a longer time to execute, such as scrolling the entire screen
down one line. In this case, the QTERM will send an XOFF
to the host when it has only six bytes empty in its buffer.
When it has processed input data to the point that the buffer
only has six bytes used, it will send an XON and the host
can resume transmitting.
The command summary in Appendix C shows approximate
execution time for each of the various operations of the
QTERM.
XON/XOFF handshaking can also be disabled (by software
command or the QDATA file) if you do not wish to use it.
However, if you do not use handshaking, you must take
extra care that you do not overrun the QTERM's receive
buffer. The two easiest ways to do this are to use a slower
baud rate (which gives the QTERM more time to process
each byte), or add delays to your code after each write to
the QTERM.
2.1.2 Commands vs. QDATA Parameters
There are numerous parameters which are set by the
QDATA configuration file (see Chapter 3), but which can
be overridden by a software command. For example, tab
spacing is set in the QDATA file but can be changed by the
Set Tab Spacing command.
In all such cases, the software command overrides the
QDATA configuration file setting but does not store the
new setting into EEPROM. Therefore, when power is
turned off, the overriding value is lost, and when the termi-
nal is turned on, the QDATA parameter will be used again.
If you wish to have the software command permanently
override the QDATA configuration file setting, you can use
the Store Parameters to EEPROM command. This saves
all currently-set parameters to the EEPROM which makes
them the current power-on defaults.
2.1.3 User Data Memory Organization
The QTERM has about 22 Kbytes of storage for user data.
Some of this is used for the information from the QDATA
file, so the exact amount depends on how much data you
put into key strings, macro strings. Typically, you will have
about 20 to 21 kbytes available for user data.

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The user data memory is divided into 64-byte pages, of
which one byte is always used for an “amount used”
counter, leaving 63 bytes for actual data in each page.
There will be around 330 pages available for user data with
a typical-size QDATA file.
Pages are addressed using a “base 64” technique that guar-
antees that all addresses are valid ASCII characters. Each
page address consists of two characters, ranging from
ASCII “@” (40h) to DEL (7Fh). For example, “AA”, “3v”,
“n]” are valid page addresses; “(F” is invalid because “(” is
not in the 40h to 7Fh range.
Here are the formulas for converting between ASCII page
numbers (MSB and LSB) and decimal page numbers
(Page-Num):
Decimal to ASCII page conversion:
MSB = “@” + INT( Page-Num / 64 )
LSB = “@” + ( Page-Num MOD 64 )
ASCII to Decimal page conversion:
Page-Num = ( MSB - “@” ) * 64 + ( LSB - “@” )
All user area commands which do not explicitly specify a
page use the current (i.e. last specified) data page.
Due to RAM limitations, multidrop terminals (EIA-485 and
EIA-422) can only access the first 15 bytes of each page.
2.2 Software Commands
Once you have configured the QTERM using the power-on
setup (see Chapter 1) and configuration-file download (see
Chapter 3), you can program your host to control the
QTERM using software commands.
Table 2-1 lists the commands available. Each command is
discussed in detail below, and a command summary,
including execution times, is given in Appendix C.
The notation ]in this chapter always means the one-byte
escape character (1Bh = 27 decimal).
Be sure to read the file READ.ME on your distribution disk
for any late changes to this manual.
Table 2-1: QTERM Software Commands.
Command Code Command Code
Bell (^G)
Backspace
Horizontal Tab (^I)
Line Feed (^J)
Vertical Tab (^K)
Form Feed (^L)
Carriage Return (^M)
XON (DC1 or ^Q)
XOFF (DC3 or ^S)
Delete
Cursor Up
Cursor Down
Cursor Right
Cursor Left
Clear Screen
Set Timeout Delay
Set Tab Spacing
Cursor Home
Set Cursor Position
Erase to End of Screen
Erase to End of Line
Set COntrast
Reset QTERM
Query Version
Buzzer On/Off/Beep
LEDs On/Off/Blink/Toggle
Insert/Replace Mode
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
11h
13h
7Fh
]A
]B
]C
]D
]E
]F..
]G..
]H
]I..
]J
]K
]L..
]M
]N
]O..
]P..
]Q..
Auto Wrap Mode
Auto Scroll Mode
Auto Line Feed Mode
Display Off
Backlight On/Off/Toggle
Query Status
Query Cursor Position
Query Character
Scroll Down
Key Repeat/Click Mode
Set Cursor Mode
Set Shift Mode
Control dig0 and dig1
Set Buzzer Duration
Set Key Click Duration
Set Key Repeat Rate
Set LED Blink Rate
Save Parameters to EEPROM
Auxiliary Serial Port Control
Transmit Buffer Flush
XON/XOFF Mode
User Area Read/Write
Get Free User Area
User Area Page Control
Macro String Execution
Query Multidrop Buffer
]R..
]S..
]T..
]U
]V..
]W
]X
]Y
]Z
]a..
]b..
]c..
]d..
]e..
]f..
]g..
]h..
]i
]j..
]k
]l..
]m..
]n
]o..
]p..
]q

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2.2.1 Bell (^G) - 07h
This causes the buzzer to beep. The default beep duration
(½ second) is set in the QDATA file; it can be overridden
with the Set Buzzer Duration command (]e). Note that
sending this command is identical to sending the Buzzer
On/Off/Beep command for a beep (]O B).
2.2.2 Backspace (^H) - 08h
Causes a nondestructive backspace, i.e. characters are not
erased as the cursor is backspaced over them. With auto
wrap mode off, the backspace stops at the left edge of the
current display line. With auto wrap mode on, the cursor
will wrap to the last position on the previous line. The com-
mand is ignored if the cursor is at the home position. See
also the Delete command (7Fh).
2.2.3 Horizontal Tab (^I) - 09h
Moves the cursor right to the next tab column. The default
tab spacing is set in the QDATA file; it can be overridden
with the Set Tab Spacing command (]G). (The QDATA
default tab spacing is every 4 spaces.)
With auto wrap on, the cursor will wrap down to the first
column in the line below when it is tabbed beyond the last
column in the current line. If auto wrap is off, the cursor
will stop at the end of the current line. If auto scroll and
auto wrap are both on, then the display will scroll up as the
cursor is tabbed beyond the last column in the last line.
2.2.4 Line Feed (^J) - 0Ah
Moves the cursor down one line without changing its hori-
zontal position. When auto scroll mode is on and a line feed
is performed on the last line, the display will scroll up with
the horizontal cursor position unaltered.
2.2.5 Vertical Tab (^K) - 0Bh
Performs the same function as Line Feed.
2.2.6 Form Feed (^L) - 0Ch
Performs the same function as Line Feed.
2.2.7 Carriage Return (^M) - 0Dh
Moves the cursor to left edge of the display on the current
line. If auto line feed mode is on, then the cursor moves to
the left edge of the next line. If auto scroll and auto line
feed are both on, a carriage return on the last line will cause
the display to scroll up and the cursor to be positioned at the
left edge of the last line.
2.2.8 XON (^Q) - 11h
Enables the QTERM to transmit keys pushed after receiv-
ing an XOFF. XON is used to re-enable QTERM transmis-
sion after an XOFF has disabled it, allowing handshaking
with the host system.
2.2.9 XOFF (^S) - 13h
Disables all QTERM transmission except for information
requested via the Query Status command (]W). After
receiving an XOFF command, the QTERM stores charac-
ters typed on the keypad in a transmit buffer. These charac-
ters will be transmitted when an XON is received. If the
buffer becomes full before an XON is received, additional
characters which are typed will be ignored.
2.2.10 Delete - 7FH
Delete works in the same way as Backspace (08h, ^H),
except that characters are erased as the cursor moves over
them.
2.2.11 Cursor Up - ]A
Moves the cursor up one line without changing its horizon-
tal position. It has no effect if the cursor is on the first line.
2.2.12 Cursor Down - ]B
Moves the cursor down one line without changing its hori-
zontal position. It has no effect if the cursor is on the last
line.
2.2.13 Cursor Right - ]C
Moves the cursor right one space without changing its ver-
tical position. It has no effect if the cursor is at the right-
most position on the current line.
2.2.14 Cursor Left - ]D
Moves the cursor left one space without changing its verti-
cal position. It has no effect if the cursor is at the left-most
position on the current line.
2.2.15 Clear Screen - ]E
Clears the display and moves the display cursor to home
(the left-most position in the top line of the display).
2.2.16 Set Timeout Delay - ]F #
This sets the time after which, if no activity has occurred,
the QTERM will automatically turn off the display (in

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order to save power). Once the display has been turned off,
it is turned back on by either of two events:
•If the operator presses a key, the display is turned back
on. However, the key is not transmitted to the host.
•If the host sends a command or character to the
QTERM, the display is turned back on, and the com-
mand or character will be processed normally.
If the QTERM has a backlight, and it is on when the time-
out occurs, the backlight is turned off along with the dis-
play. When the display is turned back on, the backlight is
turned on if it was on when the timeout occurred.
Anything displayed on the LCD screen when the timeout
occurs is lost; i.e. when the display is turned back on it will
be blank. Custom character definitions are not lost.
The format for this command is
] F #, where # is a charac-
ter in the range of 40h to 7Fh (“@” to DEL). 40h disables
the timeout function. Other values set the timeout delay in
20 second increments, from 20 seconds through 21 min-
utes. See Table 1-2 (at the end of this chapter) for a com-
plete list of codes and timeout delays.
The only thing the host can do that will not turn on the dis-
play is to issue the Query Status command (]W).
2.2.17 Set Tab Spacing - ]G #
This sets the width of the horizontal tab columns. The com-
mand has the form
] G #, where # is a character in the
range of 40h to 53h (“@” to “S”). 40h causes tab characters
to be ignored; 41h sets tabs at every column (which causes
tabs to be treated as spaces), 42h sets tabs to every second
column, etc. If # is outside this range, the command
sequence is ignored.
For example, the three-byte command string
]G D
sets tab spacing to every four spaces. See Table 1-2 (at the
end of this chapter) for a complete list of codes and tab
spacings.
2.2.18 Cursor Home - ]H
Moves the cursor to the home (top left) position on the dis-
play.
2.2.19 Set Cursor Position - ]I # *
Positions the cursor to the specified location (Table 1-2
shows location numbering). The command has the form
ESC I # *, where # sets the row and * sets the column. For
example, the string
]I B D
sets the cursor to row 2 (third row) and column 4 (fifth col-
umn). See Table 1-2 for a complete list of valid codes and
cursor positions.
2.2.20 Erase to End of Screen - ]J
Erases from the current cursor position to the end of the
screen. The cursor position is unchanged.
2.2.21 Erase to End of Line - ]K
Erases all displayed characters from the current cursor posi-
tion to the end of the line. The cursor position is unchanged.
2.2.22 Set Contrast - ]L #
This command sets the display contrast. It has the form ] L
#, where # is in the range of 40h to 7Fh (“@” to DEL). The
smaller the ASCII value of the character, the lower the con-
trast. The higher the ASCII value of the character, the
higher the contrast.
2.2.23 Reset QTERM - ]M
Resets the QTERM to its power-up state. This includes
clearing all input and output buffers and the display, and
resetting all parameters to the configuration set by the
QDATA file, or a subsequent Save Parameters to
EEPROM command.
2.2.24 Query Version - ]N
This tells the QTERM to transmit its software version to the
host. The version will consist of four ASCII characters in
the format vx.y, where x and y are single ASCII digits.
2.2.25 Buzzer On/Off/Beep -]O #
This command controls the buzzer. It has the form ] O #,
where # is
@ - turn buzzer off
A - turn buzzer on
B - beep for fixed duration
The fixed duration beep command (]O B) is identical to
sending a Bell command (07h, ^G). The duration used for
beeping is set by the Set Buzzer Duration command (]e)
and by the QDATA file (default is ½ second).

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2.2.26 LEDs On/Off/Blink/Toggle - ]P #
This controls the LEDs on the QTERM keypad, including
the shift key LED. Any of these LEDs can be set to on, off
or blink (the blink rate is set in the QDATA file and by the
Set LED Blink Rate command). If a shift key is used, press-
ing the shift key will cause the proper state of the shift LED
to override whatever state is set by this command. If no
shift key is used, the shift LED is controlled solely by this
command.
See Table 1-2 for a list of valid values for # and the effect
of each such value. As an example of this command, the
string
]P R
sets the second LED from the right to blink.
2.2.27 Insert/Replace Mode - ]Q #
In insert mode, when a character is displayed at any posi-
tion on the display, all following characters are moved right
one position. The character in the current cursor location is
also moved before the incoming character is displayed. In
delete mode, the character displayed simply over writes
whatever character was there previously.
Valid values for # are
@ - set replace mode
A - set insert mode
2.2.28 Auto Wrap Mode - ]R #
The auto wrap mode determines what happens when the
cursor moves past the end of a line. With auto wrap off, the
cursor stays at the last position in the line. With auto wrap
on, the cursor moves down to the first position in the next
line.
If the cursor moves past the end of the last line, and auto
wrap is on, then the action depends on the auto scroll mode.
If auto scroll is off, the cursor will wrap to the first position
of the line, but the display will not scroll. Otherwise, the
display will scroll, and the cursor will return to the first
position in the last line.
Valid values for # are
@ - auto wrap off
A - auto wrap on
2.2.29 Auto Scroll Mode - ]S #
Auto scroll mode determines what happens when the cursor
moves past the end of the last line. With auto scroll off, the
cursor will stay in the last position. With auto scroll on, the
display scrolls (i.e. all lines move up, and the last line
becomes blank), and the cursor moves to the first position
in the last line.
Valid values for # are
@ - auto scroll off
A - auto scroll on
2.2.30 Auto Line Feed Mode - ]T #
With auto line feed off, when a carriage return is received,
the cursor returns to the first position in the current line.
With auto line feed on, the cursor moves to the first posi-
tion in the next line, i.e. it acts as if both a carriage return
and a line feed had been received.
Valid values for # are
@ - auto line feed off
A - auto line feed on
2.2.31 Display Off - ]U
This turns off the display. Once the display has been turned
off, it is turned back on by either of two events:
•If the operator presses a key, the display is turned back
on. However, the key is not transmitted to the host.
•If the host sends a command or character to the
QTERM, the display is turned back on, and the com-
mand or character will be processed normally.
If the QTERM has a backlight, and it is on when the com-
mand is received, the backlight is turned off along with the
display. When the display is turned back on, the backlight
is turned on if it was on when the command was processed.
Anything displayed on the LCD screen when the command
is processed is lost; i.e. when the display is turned back on
it will be blank. Custom character definitions are not lost.
The only thing the host can do that will not turn on the dis-
play is to issue the Query Status command (]W).
The only reason to use this command is that it substantially
reduces the power consumption of the QTERM.

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2.2.32 Backlight On/Off/Toggle - ]V #
This command turns the backlight on and off.
Valid values for # are
@ - backlight off
A - backlight on
B - backlight toggle
2.2.33 Query Status - ]W
The Query Status command (]W) returns a character indi-
cating two things: the number of characters presently in the
QTERM transmit buffer (0 to 15), and whether the display
is on or off. Refer to Table 1-2 at the end of this chapter for
the exact values returned for various conditions.
This is the only command which you can send to the
QTERM which does not cause the display to be turned back
on if the display is off when this command is received.
2.2.34 Query Cursor Position - ]X
Returns the cursor position as two ASCII characters. These
two characters are defined in the same way as for the Set
Cursor Position (ESC I) command. See Table 1-2 for a
detailed listing.
2.2.35 Query Character - ]Y
Returns the character value for the character at the current
cursor position.
2.2.36 Scroll Down - ]Z
This causes the top three lines on the display to move down
one line. The top line is cleared, and the cursor remains at
the same absolute location on the display; i.e. it does not
scroll down with the text.
2.2.37 Key Click/Repeat Mode - ]a #
This selectively enables and disables both key repeat and
key click. The key click duration and key click rate are set
in the QDATA file.
Valid values for # are
@ - click off, repeat off
A - click off, repeat on
B - click on, repeat off
C - click on, repeat on
This command globally enables and disables the key
repeat. Which specific keys repeat is defined in the
QDATA file.
2.2.38 Set Cursor Mode - ]b #
The QTERM cursor can be an underline cursor, a block
cursor, neither or both. When neither is selected, no cursor
is visible to the user.
Valid values for # are
@ - block off, underline off (no cursor)
A - block off, underline on
B - block on, underline off
C - block on, underline on
2.2.39 Set Shift Mode - ]c #
The shift key on the QTERM can operate in one of two
ways:
•FUNCTION MODE, where the shift key stays shifted
for one additional key press only
•LOCK MODE, where the shift key stays shifted until
it is pressed a second time
For either mode, the shift LED can be enabled or disabled,
and, if enabled, properly reflects the state of the shift key.
Valid values for # are
@ - function mode, shift LED enabled
A - lock mode, shift LED enabled
B - function mode, shift LED disabled
C - lock mode, shift LED disabled
Note that the shift LED enable/disable does not affect the
shift operation itself, only the LED indicator. If you do not
wish to have a shift key at all, you can disable the shift
function by a parameter in the QDATA file.
2.2.40 Control dig0 and dig1 - ]d #
These two digital lines can be used for general control pur-
poses, or they can be used to drive an external buzzer or
horn.
Valid values for # are
@ - dig0 off (low)
A - dig1 off (low)
H - dig0 on (high)
I - dig1 on (high)
P - dig0 blink