CHD Elektroservis MXC-200 User manual

7
Model 8-463
ver. 1
USER MANUAL
© 2017 CHD Elektroserv is

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of thi s publication may be reproduced in any form without the written permission of CHD Elektroservis.
2
Contents
page
1. Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. DMX communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2. Control elements, indicators and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Device installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1. Power supply adapter connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2. MIDI system connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3. DMX system connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4. External switches connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1. Reset sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2. "Blackout" and "Master Full" functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3. Operating modes indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4. Factory reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1. Global system parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1.1. System parameters setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1.2. "DMX Channels Used" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.3. "DMX Channels Shift" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.4. "MIDI Channel" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.5. "MIDI Mode" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.6. "MIDI Shift" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.7. "MIDI Master CC Nr." parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.8. "MIDI Blackout CC Nr." parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.9. "MIDI RAC CC" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.10. "Autoreset " parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.11. "LCD Contrast" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.12. "Memory Protection" utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.13. "Bulk Dump" utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.2. Outputs parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.1. Output parameters setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.2. "Default Value" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.3. "Preheat" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.4. "Limit" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.5. "Curve" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.6. "Accept Master" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.7. "Accept Blackout" parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5. MIDI implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1. Channel commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2. System commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3. System Exclusive communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6. Example of parameters setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7. Technical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8. Warranty conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Appendices
A. MIDI implementation chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
B. Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
C. Hardware tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Manufacturer :
CHD Elektroservis
Nad kundratkou 27, 19000 Praha 9
Czech Republic
[e-mail] www.chd-el.cz

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of thi s publication may be reproduced in any form without the written permission of CHD Elektroservis.
3
1. DEVICE DESCRIPTION
MXC-200 converter is a device that enables MIDI control of the lighting apparatus components
controlled by DMX-512 standard. This allows to control lights from e.g. built-in sequencers of electronic
keyboard instruments or manually directly from the keyboard instruments without the need of special
DMX-512 compatible control panel. The converter is designed to control any DMX devices.
Features:
• The converter allows to control of up to 200 outputs - DMX channels
• Each of output has independently adjustable parameters (preheating, limitation, conversion etc.).
• Possible MIDI commands for the lighting apparatus control are Note On/Off, Key Aftertouch, Control
Changes (CCs), NRPN (Non Registered Parameters) or specific SysEx messages.
• MIDI channel for MIDI communication is user selectable.
• An external switches (e.g. Foot Switches) can be connected for control of functions of the converter.
• All converter’s activities are indicated on LCD during normal operation as well as during
programming.
• All converter’s activities are controlled by a user-programmable parameters that are stored in internal
device’s memory. All parameters are programmable manually from the device’s panel so no special
programming MIDI SysEx message are necessary.
1.1. DMX COMMUNICATION
DMX-512 standard is designed specifically to control stage lighting. It was created in the eighties
in the United States Institute for Theater Technology, Inc. (USITT). The standard has been revised
several times later.
Standard DMX-512 uses a very simple communication protocol (defined in the document USITT
Engineering Commission) DMX512/1990 Digital Data Transmission Standard. Hardware solutions for
communication circuits DMX-512 was taken from an industrial communication interface RS-485
(Electronic Industries Association standard EIA-422A and EIA-485).
The MXC-200 comply to the above standards and is fully compatible with any DMX devices thus.
1.2. CONTROL ELEMENTS, INDICATORS AND CONNECTORS
Pic.1 – Converter panels
Control and indication elements of the
converter are located on the front panel, all
connectors are on the rear panel of the
device - see pic. 1:
[1] Display
[2] SYSTÉM edit button
[3] OUTPUT edit button
[4] ENTER button
[5] INC / ON button
[6] PREVIOUS button
[7] NEXT button
[8] EXIT / RESET button
[9] DEC / OFF button
[10] MIDI-THRU / OUT connector
[11] MIDI-IN connector
[12] External foot switches connector
[13] DMX-512 output
[14] DC Power supply connector

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of thi s publication may be reproduced in any form without the written permission of CHD Elektroservis.
4
2. DEVICE INSTALLATION
Example of MXC-200 connection to the MIDI system and DMX system is shown on pic. 2
Pic. 2 – Example of the converter connection
2.1. POWER SUPPLY ADAPTER CONNECTION
Pic. 3 – Power supply unit
Power supply for MXC-200 is provided from an external adapter
connected to DC [14] connector. The connector is standard barrel type
5,5 / 2.1 mm. External DC adapter must be able to supply 250 mA at
least in the voltage range of 8 to 15 volts. The voltage need not be
stabilized. The adapter connector must have negative pole outside and
positive pole inside - see pic. 3. Polarity of the power connector is also
graphically displayed on the rear panel of the device.
Remark: The device has a built-in protection against reverse
polarity of supply voltage. If that occurs, the device doesn’t work but it is not damaged.
2.2. MIDI SYSTEM CONNECTION
MXC-200 is connected to the MIDI system using standard MIDI cables with DIN 41524 (5-pin
180°) connectors. Control data from the master MIDI system (sequencer, keyboard, PC, etc.) are
incoming to the MIDI-IN [11] input. Thru-going data are available at the output MIDI-THRU/OUT [10].
All MIDI data incoming to MIDI input of the interface are transferred to MIDI-THRU/OUT output of
the interface without any changes (THRU function). It enables connection of next MIDI devices to host
system without an additional Thru-Box etc. MIDI input of next MIDI device will be simply interconnected
with MIDI-THRU/OUT output of the interface then (see pic. 4).
If there are no other devices controlled from the master MIDI system, only MIDI-IN cable is
necessary (from MIDI system to MIDI-IN input of the converter). MIDI-THRU/OUT output of the
converter remains unconnected (see pic. 5).
Except data from input MIDI-IN, own converter’s System Exclusive messages can be transmitted
to output MIDI-THRU/OUT. These Bulk Dump messages transfer memory banks content for archiving
in PC, DAW etc. If that function is used, MIDI output MIDI-THRU/OUT of the converter must be

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of thi s publication may be reproduced in any form without the written permission of CHD Elektroservis.
5
connected to MIDI input of MIDI master system (PC, DAW…) in which data from the memory will be
archived (see pic. 6).
Pic. 4 – Connection to larger MIDI system for standard wor king mode
Pic. 5 – Connection to small MIDI system for standard working mode
Pic. 6 – Connection to MIDI system for memory content transfer
2.3. DMX SYSTEM CONNECTION
To connect the MXC-200 converter to the DMX system is used DMX-OUT [13]. In accordance
with the standard USITT (United States Institute for Theater Technology, Inc.) 5 pin XLR-type
connector should be used. However, since the vast majority of producers of the DMX equipment does
not comply the standard and uses only 3-pin XLR connectors, the 3-pin connector is used here too for
easy interconnection.
Pic. 7 - DMX-512 cable wiring variants

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of thi s publication may be reproduced in any form without the written permission of CHD Elektroservis.
6
The DMX connection cable must be wired according the picture 7. If the cable is shielded 4-line,
the spare data wires (i.e., auxiliary data lines "Spare +/-") from the XLR-5 connector remain
unconnected – the converter does not work with them. For quick orientation, the wiring of the
connector pins DMX-OUT [13] is also listed on the rear panel near to the DMX-OUT [13] connector.
2.4. EXTERNAL SWITCHES CONNECTION
Two external switches can be connected in the EXT-SW [12] stereo Jack 1/4" (TRS) – e.g. foot
switches. These switches control "Blackout" and "Master Full" functions (see chapter 3.2). Contacts of
the external switches may be NO type (Normally Open - disconnected in off position) or NC type
(Normally Connected – connected in off position) – see pic. 8. MXC-200 recognizes the type of
switches automatically.
Remark: Both switches must be connected and in off position during the device reset (i.e. when
power supply adapter is connected to the device) if they are used! In other case, the converter cannot
work with them correctly.
Pic. 8 – Connection of two external switches
Only one external switch with mono Jack 1/4" (TS) can be connected to the EXT-SW [12] socket
too. That switch controls only "Blackout" function (see chapter 3.2.). Contacts of the switch may be NO
type or NC type as in previous case – see pic. 9.
Pic. 9 – Connection of one external switch
3. DEVICE OPERATION
Functional block diagram of the MXC-200 is shown on pic. 10 The signal from the MIDI bus
coming in the MIDI input MIDI-IN [11] is supplied to the CPU and back to the MIDI-THRU/OUT [10]
output via data merging unit – "Thru" function of the output.
The received data are filtered and acceptable data are converted to output values according to
setting of system / output parameters. The result is converted to DMX signal which is transmitted to
DMX-OUT [13] output.
MIDI SysEx data generated by the CPU are fed to the data merging unit and then to MIDI-
THRU/OUT [10] output – "Out" function of the output.
Status of external switches plugged into the EXT-SW [12] TRS connector is continuously
monitored and their activation triggers the programmed functions.
All control and indicating elements are located on the front panel of the MXC-200. In normal
operating mode, the MXC-200 works automatically according to commands received through MIDI bus
and to the values of the parameters programmed by the user previously.
Note that the device has no power switch. It starts to work immediately after the power adapter
connecting to DC [14] connector.

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of thi s publication may be reproduced in any form without the written permission of CHD Elektroservis.
7
Pic. 10 - Functional block diagram
3.1. RESET SEQUENCE
The reset sequence starts automatically after power on, i.e. after connecting the converter to the
power supply adapter. The setting of all converter’s parameters is read from the internal memory
during the reset sequence and all MXC-200 circuits are then set to the
required state.
The device name and the operating system version number are
shown on display [1] during the reset sequence.
After the execution of the reset sequence, MXC-200 goes into normal working
mode.
During normal operation of the device, the reset sequence can be launched
again manually by pressing the EXIT / RESET [8] button. Info about processed reset
sequence is shown on display [1].
3.2. "BLACKOUT" AND "MASTER FULL" FUNCTIONS
These functions can be activated with external switches connected to EXT-SW [12] connector on
rear panel of the device (see chapter 2.4).
"Blackout" function turns off the outputs (DMX channels) that have enabled this
possibility with the output parameter "Accept Blackout" (see chapter 4.2.7.). The
function is active whole time during the "Blackout" switch is on. Info about active
"Blackout" function is shown on display [1].
Remark: "Blackout" function can be activated also remotely with MIDI CC selected by user (see
chapters 4.1.8 and 5.1).
"Master Full" function simulates setting of "Master" controller (see chapter
4.1.7.) to maximal value. External switch has higher priority than received MIDI
commands so changes of "Master" controller done by MIDI CC are ignored during the
"Master Full" switch is on. The function cannot be launched if "Blackout" function is active – "Master
Full" switch is ignored in that case. Info about active " Master Full" function is shown on display [1].
3.3. OPERATING MODES INDICATION
Current status of all operating modes of MXC-200 is displayed on the display [1] on the front
panel of the device.
In the normal working mode, status of DMX circuits is indicated in upper row of the display [1]
and status of MIDI circuits is displayed in lower row of the display [1].
DMX output activity is indicated with “D” symbol on the left in upper row of the
display [1]. If all DMX channels transmit only the zero value, the symbol isn’t shown.
But, if at least one of used DMX channels value is greater than the zero the symbol is
visible.

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of thi s publication may be reproduced in any form without the written permission of CHD Elektroservis.
8
On the right in upper row of the display [1], activity of "Blackout" and "Master Full" functions is
indicated – see table 1.
Table 1 – Indication of DMX circuits status in normal working mode
Symbol Meaning Duration
Quiescent status – normal function of the converter Whole time
"Master Full" function active (activated with external switch) During the function activity
"Blackout" function active (activated with external switch or
with help of MIDI Control Changes) During the function activity
MIDI input activity is indicated with “M” symbol on the left in lower row of the
display [1]. Only MIDI data acceptable by the converter are indicated. MIDI data which
only goes through are not. Presence of valid data on MIDI input is indicated by short
blink (about 0,3 sec) of the square symbol. In the case of thicker data stream, individual pulses can
melt and the symbol lights continuously then.
On the right in lower row of the display [1], receiving of MIDI System Exclusive messages for the
converter control is indicated – see table 2.
Table 2 – Indication of MIDI circuits status in normal w orking modeo
Symbol Meanig Duration
Quiescent status – no MIDI System Exclusive Message for
the converter control is received Whole time
Valid MIDI System Exclusive Message was received from
MIDI bus ca 1,5 sec
Unknown or invalid MIDI System Exclusive Message was
received from MIDI bus ca 1,5 sec
Trying to write data into memory (SysEx – Bulk Dump Load)
when memory protection is enabled ca 1,5 sec
3.4. FACTORY RESET
Parameters which controls all activities of MXC-200 are stored in user memory.
This memory can be initialized - stored data can be deleted and replaced with the
default values (so-called "Factory Reset"). "Factory Reset" values of parameter are
shown in tables 3 and 4. To perform a complete memory initialization, press the buttons SYSTEM [2]
and OUTPUT [3], keep them pressed and then connect the converter to the power supply adapter.
After connecting the adapter, device’s display shows the information about progress of the initialization
("Init… Wait") - now you can release both buttons. After the initialization is complete, the device
automatically returns to normal working mode.
Table 3 – "Factory Reset" values of global system parameters
Name Value Description (also see next chapters)
DMX Used Channels 24 Total number of used DMX channels is 24
DMX Channel Shift 1 DMX channels from 1 to 24 are used
MIDI Channel 16 MIDI commands are received on MIDI channel 16
MIDI Mode CC Outputs are controlled by MIDI Control Changes (CCs)
MIDI Shift 36 MIDI CC from #36 are used for control of outputs
MIDI Master CC Nr. 7 "Master" controller is MIDI CC #7
MIDI Blackout CC Nr. 16 "Blackout" function is controlled by MIDI CC #16
MIDI RAC CC Ena Reset All Controllers MIDI command is enabled
Autoreset On Automatic reset is enabled if an error occurs in MDI communication
LCD Contrast 20 Middle level of LCD contrast

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
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9
Table 4 – "Factory Reset" values of parameters of DMX outputs
Name Value Description (also see next chapters)
Default Value 0 Zero default value of the output after reset
Curve Lin Linear conversion curve (i.e. no conversion)
Preheat 0 No preheat
Limit 255 No limit
Accept Master On Control with "Master" controller allowed
Accept Blackout On Control with "Blackout" function allowed
4. PAR AM ETER S
Pic. 11 – Structure of user memory and control
Settings of the converter’s
parameters gives exactly how the
device will convert MIDI data to DMX
data during operation. The
parameters are divided in two basic
groups – system parameters and
parameters of individual outputs. All
parameters are fully programmable
by user. Programmed values are
stored in permanent internal memory
of the converter. All parameters can
be set in the editing operation mode
by using the buttons on front panel
of the MXC-200 or via MIDI System
Exclusive Bulk Dump
communication (see below).
Structure of internal memory
of parameters is shown on pic. 11.
All parameters are stored in memory
banks. There is one memory bank
for system parameters and 200
memory banks for individual outputs. Content of each of memory banks can be read ([1], [2]) or
changed ([3], [4]) via Bulk Dump SysEx Messages (see description of System Exclusive
communication in separate manual).
CPU of the converter receives control MIDI messages ([7]) and drives DMX outputs in
dependence on values of the parameters read from the memory banks.
Remarks: ”Output Value” MIDI SysEx messages ([5]) can be also used for direct DMX outputs
control as well as channel MIDI messages.
With help of “Display Data” MIDI SysEx messages ([6]), display of the device can be controlled
too. You can show any text on the display.
See description of System Exclusive communication in separate manual for details about these
functions.
4.1. GLOBAL SYSTEM PARAMETERS
Global system parameters define the basic configuration of hardware circuits of the converter.
Allowed range of values of parameters and values stored in memory during "Factory Reset" (see
chapter 3.4.) are shown in tables 5 and 3.
Menu for editing of the global system parameters contains also two utilities ("Memory Protection"
and "Bulk Dump") that do not set the values of parameters. They are used to protect the data against
unwanted overwriting or to send the values of parameters stored in memory for archiving.

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
No part of thi s publication may be reproduced in any form without the written permission of CHD Elektroservis.
10
Table 5 – Global system parameters
Parameter Values
Parameter name Meaning Symbol Range Meaning
DMX Channels
Used
Setting of total number of used
DMX channels 24 ~ 200 ?
DMX Cannels Shift
Setting of DMX channels shift -
selection of the lowest used
DMX channel
1 ~ 489 1 Æ chnl 1 ~ 56
457 Æ chnl 457 ~ 512
MIDI Channel
Setting of MIDI channel (and
SysEx "Device ID") for MIDI
communication
1 ~ 16 1 Æ MIDI chnl 1
16 Æ MIDI chnl 16
MIDI Mode Selection of MIDI command
type used for the converter
control
Not
N+A
CC
NRP
Not Æ Notes
N+A Æ Notes + K. After
CC Æ CCs
NRP Æ NRPNs
MIDI Shift
Setting of MIDI commands shift
- selection of the lowest used
MIDI Note, CC or NRPN 0 ~ 72 0 Æ Note/CC 0 ~ 55
72 Æ Note/CC 72 ~ 127
MIDI Master CC Nr. Selection of CC number for
"Master" controller 0 ~ 127 / Dis 0~127 Æ CC #0~#127
Dis Æ disabled
MIDI Blackout CC
Nr. Selection of CC number for "Blackout" controller 0 ~ 127 / Dis 0~127 Æ CC #0~#127
Dis Æ disabled
MIDI RAC CC
Allowing of “Reset All
Controllers” command
receiving Dis / Ena Dis Æ disabled
Ena Æ enabled
Autoreset Automatic reset if an error in
MIDI communication occurs On / Off Off Æ disabled
On Æ enabled
LCD Contrast Setting of LCD contrast 0 ~ 32 0 Æ minimum
32 Æ maximum
Memory Protection
Utility - memory protection
against unwanted data
rewriting Off / On Off Æ disabled
On Æ enabled
MIDI Bulk Dump
Utility – listing of internal user
memory content as MIDI SysEx
Msg
Whole
System
Out001 ~ 200
Whole – whole memory
System – only system
Out – output 1 ~ 200
4.1.1. SYSTEM PARAMETERS SETTING
To enter the system parameters editing mode, press the SYSTEM [2] button. Upper row of
display [1] shows the parameter name and lower row of display [1] shows its current value.
For browsing through system parameters / utilities, use PREV [5] button (jump to the previous
parameter / utility) and NEXT [7] button (jump to the next parameter / utility) – see
table 5. If memory protection is on (default status after each reset of the converter),
system parameters are not accessible for editing – menu contents only utilities. The
memory protection must be set off before the system parameters are edited.
After required parameter is selected, its value can be set by DATA-INC [5] and DATA-DEC [9]
buttons. Immediately after DATA-INC [5] button is pressed, the value is increased (or decreased if
DATA-DEC [9] button is pressed) by one unit. If any of DATA-INC/DEC buttons is pressed and hold,
the value is increased / decreased sequentially.
New value is shown on the right in lower row of display [1]. Validity of new value must be
confirmed by pressing of ENTER [4] button. If editing of a parameter is cancelled without confirmation,
MXC-200 ignores new parameter value and continues working with original value of a parameter.

MXC-200 MIDI to DMX-512 Converter Model 8-463 ver. 1
Copyright © 2017 CHD Elektroservis. All rights reserved.
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11
After setting the new values of all required parameters, pressing the EXIT [8] button cancels
editing mode – the device returns to normal working mode. It is also possible to switch to editing of
output parameters by pressing the OUTPUT [3] button at any time.
4.1.2. "DMX CHANNELS USED" PARAMETER
The converter works with 24 DMX channels (outputs) at least and with 200 DMX
channels (outputs) the most. Number of used DMX channels (outputs) is chosen with
"DMX Channels Used" system parameter.
Remark: Maximal possible number of used DMX channels (outputs) depends on setting of “MIDI
Mode” system parameter. In “Note”, “Note+Aftertouch” and “CC” modes, maximal number of used
DMX channels is limited to 128. In “NRPN” mode, all 200 DMX channels are available.
4.1.3. "DMX CHANNELS SHIFT" PARAMETER
Used DMX channels (outputs) are always in one block of consecutive DMX
channels numbers. The "DMX Channels Shift" parameter chooses which numbers of
the 512 possible DMX channels will be used. The parameter directly determines the
number of the lowest used DMX channel to which data of the output 1 will be transmitted. Some
examples of the shift of DMX channels block are shown on pic. 12.
Remark: Maximal possible shift of DMX channels depends on setting of “DMX Channels Used”
system parameter. It is from 313 for 200 used channels to 489 for 24 used channels.
Pic. 12 - DMX SHIFT parameter examples
4.1.4. "MIDI CHANNEL" PARAMETER
The parameter specifies the MIDI channel on which the MXC-200 receives MIDI
commands. It may be chosen from any of MIDI channels 1 to 16.
Remark: Selected number of MIDI channel simultaneously serves as an device
identification number for SysEx communication – see description of System Exclusive communication
in separate manual for details.
4.1.5. "MIDI MODE" PARAMETER
The converter enables to use four methods (types of MIDI commands) for
control of DMX outputs. The parameter determines which type of MIDI commands is
used:
Note On / Off (displayed as )
Block of up to 128 consecutive MIDI Notes (“Note On” and “Note Off” commands) is used for
control of individual outputs. Velocity of “Note On” command is value sent to corresponding output.
Velocity of “Note Off” command is ignored and zero value is always sent to correspond output.
Also Control Changes “ANO” (All Notes Off, CC #123) and “ASO” (All Sound Off, CC #120) are
accepted. If any of these CCs is received, zero value is sent to all outputs.

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Note On / Off + Key Aftertouch (displayed as )
Same as in Note On / Off mode – “Note On”, “Note Off”, “ANO” (CC #123) and “ASO” (CC #120)
are received and processed as described above.
More over, “Key Aftertouch” MIDI command is recognized too. Value of “Key Aftertouch” with
acceptable note number is sent to corresponding output. Recognizing of “Key Aftertouch” command is
not conditioned by activity of corresponding MIDI note (“Note On” command received previously).
Control Changes - CCs (displayed as )
Block of up to 128 consecutive MIDI Control Changes (CCs) is used for control of individual
outputs. Value of acceptable CC number is sent to corresponding output.
Be sure that CCs assigned to “MIDI Master” and “MIDI Blackout” functions (see chapters 4.1.7
and 4.1.8) are not included in block of CCs used for individual outputs control. In that case, that CCs
are used for the functions control preferably and they don’t control an output!
Non Registered Parameters - NRPNs (displayed as )
Block of up to 200 consecutive MIDI Non Registered Parameters (NRPNs) is used for control of
individual outputs. Maximal possible range of numbers of non registered parameters is from 0 to 199.
If “MIDI Mode” parameter is changed to “NRPN” mode (or after device reset when the “NRPN”
mode was programmed as default previously), the converter waits for valid number of non-registered
parameter first. The number is set with help of CC #99 (MSB) and CC#98 (LSB) first time – both these
CCs must be sent to the converter before it is able to work with NRPN values. Next changes of chosen
non-registered parameter number can be done with CC #99 (MSB) only or CC#98 (LSB) only.
After a NRPN activation, value of correspond output is set with CC #6 (Data Entry MSB) and CC
#38 (Data Entry LSB). Since the device works with values 0 to 255, both CC #6 and CC #38 must be
always sent in the order shown (i.e. MSB first, then LSB)! The complete value (0 to 255) is processed
only after the LSB (CC #38) receiving. The device will not process a change of value in another case.
For NRPN deactivation if necessary, send CC #101 with value 127 and CC #100 with value 127
to the device. This is “Null NRPN” MIDI command.
Remark: The parameter also affects the maximal number of available DMX channels (see
chapter 4.1.2). In “Note”, “Note+Aftertouch” and “CC” modes, maximal number of used DMX channels
(outputs) is limited to 128. In “NRPN“ mode, all 200 DMX channels (outputs) are available.
Pic. 13 - MIDI SHIFT parameter examples for Notes and CCs

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Pic. 14 - MIDI SHIFT parameter examples for NRPNs
4.1.6. "MIDI SHIFT" PARAMETER
Processed MIDI Notes, CCs and NRPNs are always in one block of
consecutive numbers. The "MIDI Shift" parameter sets the number of MIDI Note, CC
or NRPN from which MXC-200 start to respond - the parameter value determines the
number of the lowest MIDI Note, CC or NRPN which will be used for DMX outputs control.
Some examples of the shift of MIDI Notes / CCs are shown on pic. 13 and examples of the shift
of MIDI NRPNs are shown on pic. 14
Remark: The parameter range depends on setting of “DMX Used Channels” (see chapter 4.1.2).
If maximal possible number of used DMX channels is set (i.e. 128 or 200 in dependence on MIDI
mode), the “MIDI Shift” parameter is always 0 and it cannot be increased because there is no area for
a shift!
4.1.7. "MIDI MASTER CC Nr." PARAMETER
MXC-200 has implemented the "Master Controller" function which allows
simultaneous dimming or lighting of all required reflectors with a single controller. This
function is controlled by selected MIDI Control Changes (CC). The parameter chooses
number of CC for control of this function. Any of CCs from 0 to 127 can be chosen or “Master
Controller" function can be disabled (parameter value ”Dis”).
If a CC is assigned to “Master Controller” function, its value affects all outputs with “Accept
Master” parameter set to “On” (see chapter 4.2.6).
Remark: The CC selected as Master controller is used for this function preferably and it is no
longer processed! So this CC should not be included in the block of CCs used to outputs control in
MIDI mode “CC” (see chapter 4.1.5).
4.1.8. "MIDI BLACKOUT CC Nr." PARAMETER
The "Blackout" function allows the simultaneous turn-off of all outputs. If the
function is activated, the outputs are immediately disabled and remain so until the
"Blackout" function is cancelled. This function is controlled by selected MIDI Control
Changes (CC). The parameter chooses number of CC for control of this function. Any of CCs from 0 to
127 can be chosen or “Blackout " function can be disabled (parameter value ”Dis”).

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If a CC is assigned to “Blackout” function, its value affects all outputs with “Accept Blackout”
parameter set to “On” (see chapter 4.2.7). Values of assigned CC from 0 to 63 are evaluated as “Off”
status of “Blackout”, values from 64 to 127 as “On” status.
Remarks: The CC selected as Blackout controller is used for this function preferably and it is no
longer processed! So this CC should not be included in the block of CCs used to outputs control in
MIDI mode “CC” (see chapter 4.1.5). Blackout function has also higher priority than Master function.
Blackout function can be activated also with external switch (see chapter 3.2). External switch
has higher priority than the CC.
4.1.9. "MIDI RAC CC" PARAMETER
The parameter enables (value “Ena”) or disables (value “Dis”) processing of
received CC#121 “RAC” (Reset All Controllers) MIDI command. If disabled, received
CC#121 is ignored. If enabled and CC#121 with value 0 is received, both functions
“Master” and “Blackout” are turned to their inactive status - “Master” is set to maximum and “Blackout”
is turned off.
4.1.10. "AUTORESET " PARAMETER
The parameter allows automatic reset if an error in MIDI communication occurs.
If the parameter is "On" and an error in MIDI communication occurs, the MIDI
engine is reset automatically and no user interaction is required. Some MIDI data can
be lost but the device continues its working.
If the parameter is “Off”, occurred error is processed standard way (see Appendix B.).
4.1.11. "LCD CONTRAST " PARAMETER
The parameter sets contrast of display [1]. The parameter value is from 0 to 32.
Value equal to 0 sets minimal contrast, value equal to 32 sets maximal contrast.
4.1.12. "MEMORY PROTECTION" UTILITY
This utility allows to enable or disable the memory protection against unwanted
overwriting of data stored in memory. When the protection is active (value “On”), it is
not possible to edit both the system and output parameters. Programming of the
parameters is allowed till after the protection is removed (value “Off”). Memory protection is always set
“On” during the reset (turn-on) of the device.
Remark: The active memory protection also disables receiving of MIDI Bulk Dump SysEx
messages for changes of content of memory banks.
4.1.13. "BULK DUMP" UTILITY
This utility allows to backup the entire content of user memory in a MIDI
sequencer or a DAW in the form of MIDI Bulk Dump System Exclusive messages.
After selecting the utility in the system parameters menu, lower row of display
[1] shows name of memory bank which will be transferred:
Whole memory (displayed as )
Complete content of memory (i.e. system and all 200 output banks) will be transferred.
System memory bank (displayed as )
Content of system memory bank will be transferred.
Output mem ory bank 1 to 200 (displayed as )
Content of one selected output memory bank (Out001 to Out200) will be transferred.

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15
The data are transmitted to output MIDI-THRU/OUT [10] after ENTER [4] button
is pressed. During the transfer progress, display [1] shows advice “Wait!”.
4.2. OUTPUTS PARAMETERS
Output parameters are independent for each of outputs - each of outputs (DMX channels) may to
have individual settings of parameters. Before adjusting the output parameters, the memory protection
must be disabled (see chapter 4.1.12). When you try to edit the outputs parameters
with memory protection enabled, the converter does not respond to any changes and
the display [1] shows warning message "Memory Protected”.
Table 6 – Parameters of the outputs
Parameter Values Parameter
Name Meaning Symbol Range Meaning
Default Value Setting of default value of the
output after the device reset 0 ~ 255 0 Æ output off
255 Æ max value
Conversion
Curve
Selection of conversion curve
of the output (see pic.9)
Lin
0/1
Lg1 ~ 6
Ex1 ~ 6
1 ~ 6
1 ~ 6
Lin Æ linear
0/1 Æ bi-stable (off / on)
Lg Æ logarithmic
Ex Æ exponential
Æ “Z” curve
Æ “S” curve
Preheat Setting of minimal admissible
value of DMX output 0 ~ 127 0 Æ no preheating
127 Æ max preheating
Limit Setting of maximal admissible
value of DMX output 128 ~ 255 128 Æ max limitation
255 Æ no limitation
Accept Master
Function
"Master" controller enabled /
disabled for the output Off
On
Off Æ disabled
On Æ enabled
Accept Blackout
Function
"Blackout" function enabled /
disabled for the output Off
On
Off Æ disabled
On Æ enabled
4.2.1. OUTPUT PARAMETERS SETTING
To enter output parameters editing mode, pres the OUTPUT [3] button. Upper
row of display [1] shows text “Output” and lower row of display [1] shows number of
output selected for editing. Selection of output for editing can be done by DATA-INC
[5] button (increasing of output number) and DATA-DEC [9] button (decreasing of output number).
Selection of output number must be confirmed by pressing of ENTER [4] button. It is also possible to
cancel editing by the EXIT [8] button.
After selection of output number is confirmed, upper row of display [1] shows number of selected
output on the left and name of parameter for editing on the right. Lower row of display [1] shows
current value of the parameter.
For browsing through output parameters, use PREV [5] button (jump to the previous parameter
and NEXT [7] button (jump to the next parameter) – see table 6.
Parameter value can be set by DATA-INC [5] and DATA-DEC [9] buttons. Immediately after
DATA-INC [5] button is pressed, the value is increased by one unit, or decreased by one unit if DATA-
DEC [9] button is pressed. If any of DATA-INC/DEC buttons is pressed and hold, the value is
increased / decreased sequentially.
New value is shown on the right in lower row of display [1]. Validity of new value must be
confirmed by pressing of ENTER [4] button. If editing of a parameter is cancelled without confirmation,
MXC-200 ignores new parameter value and continues working with original value of a parameter.

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16
After setting the new values of all parameters, return to the selection of the output for editing is
done by pressing EXIT [8] or OUTPUT [3] button. Now you can continue with setting of parameters of
another output.
After setting of parameters of all required outputs, repeated pressing of EXIT [8] button cancels
editing mode – the device returns to normal working mode.
It is also possible to switch to editing of system parameters by pressing the SYSTEM [2] button
at any time.
4.2.2. "DEFAULT VALUE" PARAMETER
The parameter chooses default value of the output, i.e. the value at which the
output is set during the device reset.
Parameter value can be from 0 to 255. The value determines directly value of
corresponding output.
4.2.3. "CONVERSION CURVE" PARAMETER
To convert the input MIDI data to the output DMX data, it is possible to select
none conversion (linear response), bi-stable conversion (on / off switch) or one of 24
predefined conversion curves – see pic. 15.
Linear response (no conversion) is universal for general purpose.
Choice of binary output (on / off switch) is suitable for DMX devices that are not controlled
continuously, but are only switched on and off (e.g. fog machines, fireworks, etc.).
Appropriate Log or Exp conversion curve should be selected by the type of used light bulbs and
the conversion features of the dimmer, to enable brightness changes of light bulbs as evenly as
possible across the range of values of input MIDI control data.
"Z" type curves are stretched (they have increased sensitivity) in middle position of control and
"S" type curves are shrinked (they have reduced sensitivity) in middle position of the control. They can
be used e.g. for general management of moving lights.
Pic. 15 – Conversion curve shapes

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Pic. 15 – Conversion curve shapes (continue)
4.2.4. "PREHEAT" PARAMETER
By the "Preheat" parameter, you can specify a minimum value below which
must never fall the value transmitted to the DMX output channel. This allows for
example permanent bulb preheating and thus to extend its life several times.
Value of the parameter is from 0 to 127. The value corresponds directly to the minimal permitted
value for the DMX output channel. Effect of the "Preheat" parameter on transmitted data shows pic 16.

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Pic. 16 - "Preheat" and "Limit" parameters effect on transmitted DMX values
4.2.5. "LIMIT"PARAMETR
The parameter sets the maximum value transmitted to the corresponding DMX
output channel, i.e. it is possible to limit the maximum brightness of the reflectors.
Value of the parameter is from 128 to 255. The value corresponds directly to the
maximal permitted value for the DMX output channel. Effect of the "Limit" parameter on transmitted
data shows pic 16.
4.2.6. "ACCEPT MASTER " PARAMETER
The parameter enables (symbol "On") or disables (symbol "Off") the influence of
the "Master" controller for the DMX output channel.
It is suitable to enable the "Master" controller for DMX output channels used for
control of dimmers. For control of movement of lights or speed of stroboscopes, the "Master" controller
should be disabled rather.
4.2.7. "ACCEPT BLACKOUT" PARAMETER
The parameter enables (symbol "On") or disables (symbol "Off") the effect of the
"Blackout" function for the DMX channel.
It is suitable to enable the "Blackout" controller for DMX output channels used
for control of dimmers. For control of movement of lights or speed of stroboscopes, the "Blackout"
controller should be disabled rather.
5. MIDI IM PLEM ENTATION
MXC-200 recognizes MIDI Channel commands, Common System commands and System
Exclusive messages. Channel commands are accepted only on MIDI channel selected by the system
parameter "MIDI Channel".

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5.1. CHANNEL COMMANDS
The MXC-200 recognizes MIDI Channel commands "Note Off", "Note On", "Key Aftertouch" and
"Control Changes" respecting the “Running Status” mode. Acceptance of MIDI Channel commands
depends on “MIDI Mode” system parameter (see chapter 4.1.5)
Note Off
“Note Off” MIDI commands are recognized only in "Note" or “Note+Aftertouch” MIDI modes (see
chapter 4.1.5). Only note number (Note Nr) is accepted. Speed sensitivity (Velocity) is ignored.
It is accepted block of consecutive note numbers from the total range of note numbers (0 to 127)
in dependence on “DMX Channels Used” and "MIDI Shift" system parameters setting. After acceptable
“Note Off” command receiving, the corresponding output (DMX channel) is turned off.
Note On
“Note On” MIDI commands are recognized only in "Note" or “Note+Aftertouch” MIDI modes (see
chapter 4.1.5). Both note number (Note Nr) and speed sensitivity (Velocity) are accepted.
It is accepted block of consecutive note numbers from the total range of note numbers (0 to 127)
in dependence on “DMX Channels Used” and "MIDI Shift" system parameters setting. After acceptable
“Note On” command receiving, its speed sensitivity (Velocity) value is sent to the corresponding output
(DMX channel).
Key Aftertouch
“Key Aftertouch” MIDI commands are recognized only in “Note+Aftertouch” MIDI mode (see
chapter 4.1.5). Both note number (Note Nr) and aftertouch value are accepted.
It is accepted block of consecutive note numbers from the total range of note numbers (0 to 127)
in dependence on “DMX Channels Used” and "MIDI Shift" system parameters setting. After acceptable
“Key Aftertouch” command receiving, its value is sent to the corresponding output (DMX channel).
Valid "Key Aftertouch” MIDI command is always accepted - regardless of whether the note
number had forerun the Note-On command.
Control Changes (CCs)
MXC-200 recognizes normalized Control Changes (CCs) Nr. 6, 38, 98, 99, 100, 101, 120, 121
and 123 and some other CCs for control of outputs. All CCs are accepted only in dependence on
setting of system parameters – see table 7.
CC #6 – Data Entry MSB
The CC is accepted only if "MIDI Mode" system parameter is set to "NRPN". It determines MSB
of value for output selected previously with CCs #99 and #98 (see chapter 4.1.5 for details).
CC #38 – Data Entry LSB
The CC is accepted only if "MIDI Mode" system parameter is set to "NRPN". It determines LSB
of value for output selected previously with CCs #99 and #98 (see chapter 4.1.5 for details).
CC #99 and #98 – Non-Registered Parameter Number (NRPN)
The CCs are accepted only if "MIDI Mode" system parameter is set to "NRPN". This pair of CCs
determines number (CC #99 value is MSB and CC #98 value is LSB) of selected output for next
control of the output level via CCs #6 and #38 (see chapter 4.1.5 for details).
CC #101 and #100 – Registered Parameter Number (RPN)
The CCs are accepted only if "MIDI Mode" system parameter is set to "NRPN". If this pair of CCs
is received, it stops sensitivity to CCs #6 and #38 – they don’t change value of an output yet.
CC #120 – All Sound Off (ASO)
Controller is accepted only if "MIDI Mode" system parameter is set to "Note" or
“Note+Aftertouch”. Always when this controller is received (its value must be zero), all outputs are set
to minimal value (according to "Preheat" parameter - see chapter 4.2.4).

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Table 7 – Acceptable CC overview
CC Nr. Name / Function Valid value Acceptable in
MIDI Mode(s) Remarks
6 Data Entry MSB
Standard MIDI function 0 ~ 127 “NRPN”
38 Data Entry LSB
Standard MIDI function 0 ~ 127 “NRPN”
Only values 0 to 255 are
acceptable. Higher values are
corrected to 255.
98 NRPN LSB
Standard MIDI function 0 ~ 127 “NRPN”
99 NRPN MSB
Standard MIDI function 0 ~ 127 “NRPN”
Only NRPNs 0 to 199 can be
used for outputs control. All
other cause “NRPN Null”
status.
100 RPN LSB
Standard MIDI function 0 ~ 127 “NRPN”
101 RPN MSB
Standard MIDI function 0 ~ 127 “NRPN”
All RPNs cause “NRPN Null”
status.
120 ASO
Standard MIDI function
0 = ASO
1~127 = invalid
“Note” and
“Note+Aftertouch”
121 RAC
Standard MIDI function
0 = RAC
1~127 = invalid All modes Can be enabled or disabled by
“MIDI RAC CC” parameter
123 ANO
Standard MIDI function
0 = ANO
1~127 = invalid
“Note” and
“Note+Aftertouch”
@ Master CC Own CC – “Master”
Master function control 0 ~ 127 All modes
Any CC# can be chosen or
can be disabled by “MIDI
Master CC Nr.” parameter
@ Blackout CC Own CC – “Blackout”
Blackout function control
0 ~ 63 = Off
64 ~ 127 = On All modes
Any CC# can be chosen or
can be disabled by “MIDI
Blackout CC Nr.” parameter
@ … Own CCs – “Out value”
Individual outputs control 0 ~ 127 “CC”
Block of CC# - starting
number corresponds to “MIDI
Shift” parameter
CC #121 – Reset All C ontrollers
If this CC is received (its second databyte must be zero) and its receiving is enabled with (see
chapter 4.1.9), the "Master" controller is immediately set to the highest value and the "Blackout"
controller is turned off. If the converter works in "CC" mode (see chapter 4.1.5), values of individual
outputs remain unchanged.
CC #123 – All Notes Off
The CC is accepted only in MIDI mode "Note" (see chapter 4.1.5). Always when this controller is
received (its value must be zero), all outputs are set to minimal value (according to "Preheat"
parameter - see chapter 4.2.4).
CC #[@ Master CC Nr.]
The CC selected by the system parameter "Master CC Nr." (see chapter 4.1.7) works as the
main regulator for all enabled outputs (see the output parameter "Accept Master" – chapter 4.2.6).
Value of the controller may be in full range of 0 to 127.
CC #[@ Blackout CC Nr.]
The CC selected by the system parameter "Blackout CC Nr." (see chapter 4.1.8) controls the
"Blackout" function for all enabled outputs (see the output parameter "Accept Blackout" – chapter
4.2.7). The Blackout function is off for values from 0 to 63 and active for values from 64 to 127 of this
CC.