Gamma+ DIGITEL MPCq User manual

DIGITEL MPCq CONTROLLER
USERS MANUAL
Document 900034, Rev B
ISO 9001:2015 Certied

Page 2 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
CONTENT
1. GENERAL INFORMATION..................................................3
2. APPROVALS........................................................................3
3. WARNINGS........................................................................3
4. UNPACKING THE CONTROLLER ........................................4
5. SAFETY NOTICES...............................................................4
6. INSTALLATION...................................................................4
7. CONTROLLER CONFIGURATION.......................................5
8. HV CONTROL / ION PUMP OPERATION............................5
9. PRESSURE MEASUREMENT ................................................. 6
10. FRONT PANEL..................................................................6
11. TOUCHSCREEN USER INTERFACE ....................................7
12. ERROR / STATUS CODES................................................ 14
13. REAR PANEL ................................................................... 15
14. SERIAL COMMUNICATION ............................................ 17
15. ETHERNET COMMUNICATION...................................... 24
16. PROFIBUS COMMUNICATION....................................... 24
17. TECHNICAL SPECIFICATIONS.........................................25
18. WARRANTY & SERVICE................................................... 26
19. RETURN MATERIAL AUTHORIZATION FORM ..................28
TABLES
Table 1. Error / Status Codes ................................................. 14
Table 2. J104 Connector Pinout............................................. 16
Table 3. J112 Connector Pinout ............................................. 16
Table 4. Command Packet Structure Over Serial Connection... 17
Table 5. Response Packet Structure Over Serial Connection..... 18
Table 6. Response Code Error Codes..................................... 18
Table 7. Command CRC Checksum ....................................... 19
Table 8. Response CRC Checksum......................................... 19
Table 9. Gamma Protocol Commands....................................20
Table 10.Command Packet Struct. Over Ethernet Connection .. 24
FIGURES
Figure 1. MPCq Front Panel .....................................................6
Figure 2. Home Screen (two HV supplies installed) ....................7
Figure 3. Home Screen (with internal TSP supply installed) .........7
Figure 4. Home Screen With Control Buttons Invoked................7
Figure 5. Main Menu (Page 1)).................................................7
Figure 6. Main Menu (Page 2) .................................................7
Figure 7. Supply Setup Screen ..................................................8
Figure 8. Display Setup Screen.................................................8
Figure 9. System Setup Screen..................................................8
Figure 10. Analog Output Screen.............................................9
Figure 11. Digital Input Setup Screen ........................................9
Figure 12. Digital Output Setup Screen................................... 10
Figure 13. Relay Setup Screen................................................ 10
Figure 14. Serial Port Setup Screen......................................... 11
Figure 15. Profibus Setup Screen............................................ 11
Figure 16. Ethernet Setup Screen............................................ 11
Figure 17. TSP Sublimation View Screen (no control buttons) .... 12
Figure 18. TSP Sublimation View Screen With Controls ............ 12
Figure 19. TSP Setup Screen................................................... 13
Figure 20. TSP Pressure Window Screen ................................. 13
Figure 21. Display Error/Status Codes Screen.......................... 14
Figure 22. MPCq Rear Panel.................................................. 15

Page 3 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
1. GENERAL INFORMATION
The DIGITEL™ MPCq is an ion pump power supply controller.
It is designed to operate up to two independent ion pumps along
with a titanium sublimation pump (TSP).
It can accommodate any ion pump size up to 1200 l/s.
The front panel display provides direct readout of the ion pump
voltage, current, or pressure.
Individual model specification information is located on our website
at: www.gammavacuum.com.
WARNING: Do not use unauthorized parts.
Such parts may compromise safety. Contact
Gamma Vacuum with any questions.
NOTE: Read this entire manual and follow installation instructions.
Failure to do so may cause injury and/or may void warranty.
2. APPROVALS
The DIGITEL MPCq is shown to meet the intent of Directive 89/336/
EEC for Electromagnetic Compatibility and Low Voltage Directive
73/23/EEC for product Safety. Compliance was demonstrated to
the following specifications as listed in the Official Journal of the
European Communities:
• IEC 61010-1
• EN 61010-1
• UL 61010-1
• CAN/CSA-C22.2 No. 61010-1
3. WARNINGS
WARNING:
SHOCK HAZARD. CAN
CAUSE INJURY OR DEATH.
REMOVE POWER BEFORE
SERVICING.
ALERTE:
RISQUE DE CHOC. PEUT
CAUSER DES BLESSURES
OU LA MORT. RETIRER LA
SOURCE D’ALIMENTATION
AVANT LE SERVICE.
警 告：
点検・修理の際は 必
ず全ての電源を お
切りください。 使
用者が感電した り、
死亡、または 重傷
を負う危険が あり
ます。
安全 警告:
触电危险。触 电可 能导
致受伤或死亡。 请于维
修前去掉电 源。
ADVERTENCIA:
PELIGRO POR DESCARGA. PUEDE
CAUSAR LESIÓN O INCLUSO LA
MUERTE. RETIRE Y DESCONECTE
LA FUENTE DE ALIMENTACION
ELECTRICA, ANTES DE PROCEDER
AL SERVICIO DE REPARACIÓN,
MANTENIMIENTO O REVISION
INTERNA.
ACHTUNG:
GEFAHR ELEKTRISCHER
SCHLÄGE. VERLETZUNGS- ODER
LEBENSGEFAHR. TRENNEN
SIE ALLE ELEKTRISCHEN
ANSCHLÜSSE VON DER
SPANNUNGSVERSORGUNG
BEVOR SIE ARBEITEN AN DEM
GERÄT AUSFÜHREN.
WARNING:
HEAVY OBJECT. TO AVOID
MUSCLE STRAIN OR BACK
INJURY, USE LIFTING AIDS
AND PROPER LIFTING
TECHNIQUES WHEN
REMOVING OR REPLACING.
ALERTE:
OBJET LOURD. POUR
EVITER UNE TENSION
MUSCULAIRE OU UN MAL
DE DOS, UTILISER DES
AIDES ET DES TECHNIQUES
DE LEVAGE APPROPRIEES
POUR L’ENLEVEMENT OU LE
DEPLACEMENT.
警告:
大 変 重 い 装 置 で す。
筋挫傷、背部損
傷等を防ぐ為、移
動や移設の際は適
切な技術や補助機
器 等 を使 用してく
ださい。
安全 警告:
重物。为避免肌肉
拉伤或背部受伤，
当移动或归位时请
使用起重设备以及
适当的起重技术。
ADVERTENCIA:
OBJETO PESADO. PARA EVITAR UN
SOBRE-ESFUERZO MUSCULAR O
DAÑO FÍSICO, UTILIZE LA AYUDA
DE ELEVADORES Y TÉCNICAS
APROPIADAS PARA EL MANEJO
DE OBJETOS PESADOS, CUANDO
LO TRANSPORTE, DESPLAZE O
CONSIDERE REEMPLAZARLO.
ACHTUNG:
SCHWERES OBJEKT.
ZUR VERMEIDUNG VON
MUSKELZERRUNGEN ODER
RÜCKENSCHÄDEN BEIM
TRANSPORT GEEIGNETE
HUBVOR-RICHTUNGEN UND
HEBETECHNIKEN VERWENDEN.
WARNING:
READ AND UNDERSTAND
OPERATOR’S MANUAL
BEFORE USING THIS
MACHINE. FAILURE TO
FOLLOW OPERATING
INSTRUCTIONS COULD
RESULT IN INJURY OR
DAMAGE TO EQUIPMENT.
ALERTE:
LIRE ET COMPRENDRE LE
MANUEL D’OPERATION
AVANT D’UTILISER CETTE
MACHINE . NE PAS SUIVRE
LES INSTRUCTIONS
D’OPERATION PEUT CAUSER
DES BLESSURES OU DES
DEGATS A L’EQUIPEMENT.
警 告：
この 装 置を 使 用さ
れる前に必ず取 扱
説明書を熟読し理
解した上でご使 用
く だ さ い 。取 扱 説
明書 の 通り操作を
しなかった場合、
装 置 が 損 傷 、破 損
することがありま
す。
安全 警告:
在使用这台机器前，
请务必阅读并理解
“操作员手册
（ 指 南 ）”。如 果
未能遵循操作步骤
说明 ，将 可 能 导致
设备的损坏。
ADVERTENCIA:
LEA, ESTUDIE, Y ENTIENDA BIEN EL
MANUAL DE OPERACION, ANTES
DE USAR ESTA MAQUINARIA.
UNA FALLA POR NO SEGUIR LAS
INSTRUCCIONES OPERATIVAS,
PUDIERA RESULTAR EN DAÑO O
PERJUICO DEL EQUIPO.
ACHTUNG:
LESEN UND VERSTEHEN SIE
DIE BEDIENUNGSANLEITUNG
BEVOR SIE DAS GERÄT IN BETRIEB
NEHMEN. FEHLBEDIENUNGEN
KÖNNEN ZU VERLETZUNGEN
FÜHREN ODER DIE AUSRÜSTUNG
BESCHÄDIGEN.

Page 4 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
4. UNPACKING THE CONTROLLER
4.1 Inspect For Any Obvious Damage
If the controller is damaged in any way, a claim should be filed with
the carrier immediately and notification given to customer center
where the order originated, and/or Gamma Vacuum.
If equipment must be retuned for inspection or repair, obtain a return
authorization from Gamma Vacuum prior to shipping. Contact
Gamma Vacuum for authorization and return instructions.
4.2 Check The Equipment Received
Ensure that all items shipped have been received. If any items are
missing, notify the carrier and Gamma Vacuum. Save all packaging
material for inspection.
5. SAFETY NOTICES
1. Gamma vacuum controllers designed for ion pump operation
are capable of delivering 7kV under open-circuit or low-pressure
operating conditions. Gamma vacuum products are designed
and manufactured to provide protection against electrical and
mechanical hazards for the operator and the area surrounding the
product.
2. Installation procedures are for use by qualified, authorized
personnel who have experience working with 50 volts or greater.
To avoid personal injury, do not perform any installation or service
unless qualified to do so.
3.There are no serviceable parts inside the controller power-supply,
and voltages as high as 7kV may be present. Do not open the
supply case under any circumstances. In the event of the power-
supply requiring attention, return it to Gamma Vacuum.
4. Do not disconnect the high-voltage cable with the power on.
After turning the power off, allow at least one minute before
disconnecting electrical equipment.
5.Do not operate the controller without a proper electrical ground or
near water. The controller may be damaged and its safety reduced
if it is operated outside of its specifications.
6. INSTALLATION
The DIGITEL MPCq is a full 19 inch rack controller. No additoinal
hardware needed to install in a standard 19 inch wide device rack.
Maintain a 2.52 in. (64 mm) clearance behind controllers for cable
bend radius and proper airflow.
CAUTION: This equipment uses a detachable
power supply cord. Do not replace with
inadequately rated supply cords.
6.1 Required Items
You will need the following items to install the controller:
1. A 3-wire, detachable, universal input power cable (included).
2. A high voltage (HV) cable for each pump (ordered separately).
3.A safety ground cable for each pump (ordered separately).
6.2 Installation Procedure
1. Place the controller in its location and secure as necessary.
2. Connect the safety ground cable to the pump and the safety
ground stud at the DIGITEL rear panel.
3.Connect the high voltage cable to the ion pump and the high
voltage connector on the DIGITEL rear panel (J501–J504).
4. If high voltage cable has an optional safeconn feature (HV
interlock), an additional connector is part of the high voltage
cable. Connect it to the safeconn connector (J401–J404),
otherwise, use safeconn shorting jumper cable to connect to
safeconn connector (J401-J404). Safeconn interlock must be
satisfied, otherwise HV cannot be turned on.
5.Verify correct input voltage requirements. Connect mains AC
power cable to input power receptacle on the controller rear panel.

Page 5 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
7. CONTROLLER CONFIGURATION
Following configuration options are specified at order time:
7.1 Input Mains AC Voltage (110Vac vs. 220Vac)
Controller does not have universal power input, thus input mains AC
voltage is part of the controller configuration.
Care must be taken when connecting controller to mains AC voltage
to avoid connecting controller to wrong input voltage.
7.2 Supply configuration
Following controller configurations are valid:
a. One HV supply/channel
b. Two HV supplies/channels
c. One HV supply/channel and one internal TSP or NEG supply
7.3 Output voltage polarity for each HV channel
(positive vs. negative)
In case of positive polarity, output voltage is set to 7kV by default.
In case of negative polarity, output voltage is set to -5.6kV by default.
Output voltage is fixed (linear power supply, transformer tap).
7.4 Type of the HV output connectors
Following are standard HV connector types for J501 - J504:
a. SHV-10kV (matching safeconn connector type is SMB style)
b. Fisher (matching safeconn connector type is mini banana style)
Other HV connector types are available per request.
7. 5 Number of HV output connectors per HV supply
There can be more than one HV output connector tied to the same
HV supply. In such case, connectors are tied in parallel.
Controller can have maximum of 4 HV output connectors in any
configuration. For example, 2 HV output connectors per 1 HV supply.
7.6 Communication interface
Controller comes standard with Serial and Ethernet interface.
Profibus interface is optional.
7.7 Remote TSP control
Controller comes standard with connector J505 CTRL installed.
Connector can be used to connect and control Remote TSP/NEG
Controller.
See rear panel section for connector location.
If internal TSP/NEG supply is installed, connector J505 is not
availble.
8. HV CONTROL / ION PUMP OPERATION
8.1 Prior to using an ion pump
Confirm following:
- Rough pump down to 1x10-4 Torr or less (the lower the better).
1x10-6 Torr is recommended. See Rough Pump user manual for
details.
NOTE: Use the full extent of available rough pumping before
starting an ion pump to extend pump’s lifetime, improve
system ultimate pressure, and get accurate current readings.
- Evacuate the Vacuum System
- Ensure contaminants do not exist in the system.
- If necessary (i.e. ion pump exposed to atmospheric pressure) bake
the ion pump and system into roughing pump to achieve lowest
pressure. See Ion Pump user manual for details.
8.2 Prior to turning on HV and starting an ion pump
Confirm following:
- Verify high voltage cable is installed and connecting controller’s
high voltage (HV) output connector (rear panel, J501-J504) to the
ion pump.
- Verify controller and connected ion pumps are grounded using
redundant ground wire.
- Verify controller’s high voltage output has correct polarity for the
connected ion pump (positive for diode pump, negative for triode
pump).
- Verify safeconn interlock is satisfied.
If high voltage cable has optional safeconn interlock feature, an
additional connector is part of the high voltage cable. Connect
it to controller’s safeconn connector (J401-J404). If high voltage
cable does not have safeconn interlock feature, use safeconn
shorting jumper cable to connect to controller’s safeconn connector
(J401-J404).
Safeconn interlock must be satisfied, otherwise HV cannot be turned
on.
If safeconn interlock is not satisfied, controller will display error 20
(safeconn interlock not satisfied) for that HV channel.
- Verify proper pump size is configured. HV cannot be turned on if
pump size is set to 0. By default pump size is set to 0.
If pump size is set to zero, controller will display error 22 (Pump size
not configured) for that HV channel.
8.3 Turn HV on/off
Turning HV on/off can be achieved:
- Using front panel touchscreen.
- Using remote communication (Serial, Ethernet or Profibus).
- Using rear panel connector J104, Misc. I/O. (Digital Inputs)

Page 6 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
9. PRESSURE MEASUREMENT
Pressure value is determined using following equation
Where:
I - Current in amps.
V - Voltage in volts.
U - Pressure units conversion factor (1 for Torr, 1.33 for mBar and 133 for Pascal).
F - Configured pump pressure factor. Typically set to 1. See “11.4 Supply Setup” on page 8.
S - Configured pump size in l/s. See “11.4 Supply Setup” on page 8.
10. FRONT PANEL
Figure 1. MPCq Front Panel
10.1 Description
Front panel containts:
- Main power on/off rocker type switch (hard switch, when in off position main power is completely cut off from the unit)
- Main power indicator lamp (color green)
- 7” TFT WVGA (800x480) Color LCD, 16:9 aspect ratio, touchscreen capable (primary user interface)
- Two supply HV on/off indicator lamps (color red). Note, both lamps are installed even in single supply configuration.

Page 7 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
11. TOUCHSCREEN USER INTERFACE
11.1 Home Screen
Touch anywhere on the screen to invoke button controls.
Figure 2. Home Screen (two HV supplies installed)
Figure 3. Home Screen (with internal TSP supply installed)
Figure 4. Home Screen With Control Buttons Invoked
Available options:
View TSP - Switches home screen to TSP view. Button is available
only if Remote TSP Controller is connected to the MPCq Controller.
Menu - Invokes main menu.
Exit - Clears screen/hides control buttons.
Turn On/Off - Turns HV on/off for respective HV channel.
11.2 Main Menu (Page 1)
Figure 5. Main Menu (Page 1))
Page 1 of main menu is accessed by pressing the “PAGE ½” button.
Exit button will exit main menu and show home screen.
11.3 Main Menu (Page 2)
Figure 6. Main Menu (Page 2)
Page 2 of Setup Screen is accessed by pressing the “PAGE ½”
button.
Exit button will exit main menu and show home screen.

Page 8 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
11. 4 Supply Setup
Figure 7. Supply Setup Screen
Available setup:
Pump name - Configures pump name. Max of 15 characters.
Pump size - Configures pump size (0-1200).
Auto restart - Configures supply auto restart option (on/off).
Main display value - Configures main display value (voltage, current
pressure).
Pressure factor - Configures pump pressure factor. See “9. Pressure
Measurement” on page 6 for details.
Supply calibration - Invokes supply calibration (zeroing) process.
11. 5 Display Setup
Figure 8. Display Setup Screen
Available setup:
Brigtness Level - Configures screen brightness level (1-10).
Screensaver - Configures screen-saver on/off state. Turning screen-
saver off is not recomended as this will shorten screen backlight
lifetime.
Touchscreen calibration - Invokes touchscreen calibration process.
11.6 System Setup
Figure 9. System Setup Screen
Available setup:
Language - Configures user interface language.
Pressure Units - Configures system pressure units (Torr,
mBar, Pascal).
Fan Control - Configures fan control (On, Auto).
Restore Default Settings - Resets all settings to system defaults.
Setpoint view - Turns on/off setpoint view button on the home
screen.

Page 9 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
11.7 Analog Output
Figure 10. Analog Output Screen
Total of four analog outputs on connector J104:
Analog Output 1 (J104, pin 30)
Analog Output 2 (J104, pin 32)
Analog Output 3 (J104, pin 34)
Analog Output 4 (J104, pin 36)
By default, all analog outputs are turned off (function set to off).
Analog output signal range 0-10V.
Available Functions:
OFF
Pressure, logarithmic
Current, logarithmic
Current, 1V / 1nA
Current, 1V / 10nA
Current, 1V / 100nA
Current, 1V / 1uA
Current, 1V / 10uA
Current, 1V / 100uA
Current, 1V / 1mA
Current, 1V / 10mA
Current, 1V / 50mA
Voltage, 1V / 1kV
Supply Source - Selects supply driving analog output.
Options applicable to ‘Pressure, logarithmic’ and ‘Current,
Logarithmic’ functions:
Offset: Valid range from -15 to +15
Output State: Normal vs. Inverted (see examples below for details)
Logarithmic Current Example:
Current = 2X10-8 (20nA), Offset = 8, Output state = Normal
Step 1: Calculate the log of the current (Log (2X10-8) = -7.7).
Step 2: If ‘Output state = Inverted’ multiply current log value in
step 1 by (-1).
Step 3: Add the offset value (-7.7 + 8 = 0.3 Volts).
The analog output pin will read 0.3V.
Logarithmic Pressure Example:
Pressure = 1x10-9 Torr, Offset = 11, Output state = Normal
Step 1: Calculate log of pressure (Log (1x10-9) = -9)
Step 2: If ‘Output state = Inverted’ multiply current log value in
step 1 by (-1).
Step 3: Add offset value(-9 + 11 = 2V)
The analog output pin will read 2V.
11.8 Digital Input Setup
Figure 11. Digital Input Setup Screen
Total of four digital inputs on connector J104.
Digital Input 1 (J104, pin 22)
Digital Input 2 (J104, pin 23)
Digital Input 3 (J104, pin 24)
Digital Input 4 (J104, pin 25)
By default all digital inputs are turned off (function set to off).
Available Functions:
OFF
HV Interlock
HV Switch
TSP 1 Interlock
TSP 2 Interlock
HV Interlock Function
Ground pin to satisfy interlock. If interlock is not satisfied, HV cannot
run.
HV Switch Function
Ground pin to turn on HV, otherwise HV is off.
TSP 1 Interlock Function
Ground pin to satisfy TSP 1 interlock. If interlock is satisfied, TSP 1
cannot run.
TSP 2 Interlock Function
Ground pin to satisfy TSP 2 interlock. if interlock is not satisfied, TSP
2 cannot run.
Supply Source - Selects supply that will be controlled by this setup.

Page 10 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
11.9 Digital Output
Figure 12. Digital Output Setup Screen
Total of four digital outputs on connector J104:
Digital Output 1 (J104, pin 15)
Digital Output 2 (J104, pin 17)
Digital Output 3 (J104, pin 19)
Digital Output 4 (J104, pin 37)
By default, all digital outputs are turned off (function set to off).
Digital output signal 0-5V.
Available Functions:
OFF
Pressure setpoint
HV Error
HV Output state
Pressure Setpoint Function
ON Pressure - When pressure value gets below this point, digital
output is asserted.
OFF Pressure - When pressure value gets above this point, digital
output is deasserted.
HV Error Function
Digital output is asserted when supply error is detected.
HV Output State Function
Digital output is asserted when supply is on (HV on), or de-asserted
when supply is off (HV off).
Supply source - Selects supply driving digital output.
11.10 Relay Setup
Figure 13. Relay Setup Screen
Total of four relays on connector J104:
Relay 1 (J104, pins 1, 2, 3)
Relay 2 (J104, pins 4, 5, 6)
Relay 3 (J104, pins 7, 8, 9)
Relay 4 (J104, pins 10, 11, 12)
By default, all relays are turned off (function set to off).
Setup is identical to digital output setup. See digital output setup.
For relay pinout details see “Table 2. J104 Connector Pinout” on
page 16.

Page 11 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
11.11 Serial Port Setup
Figure 14. Serial Port Setup Screen
Available setup:
Node Address - Configures unit node address (1-255). Gamma
protocol command packet structure requires node address.
Serial Standard - Selects serial standard: RS-232, RS-485HD (two
wire mode), and RS-485FD(four wire mode)).
Baud Rate - Selects baud rate (9600, 19200, 38400, 57600,
11520 0 ).
Data bits/Stop bits - Information only.
Serial Protocol - Selects serial protocol running on the serial port.
Supported protocols are Gamma, Modbus
ASCII, and Modbus RTU.
NOTE: Modbus register map is available on Gamma Vacuum
website under download section.
11.12 Profibus Setup
Figure 15. Profibus Setup Screen
For Profibus information reference Profibus user manual, document
900033 available on Gamma Vacuum website under download
section.
11.13 Ethernet Interface Setup
Figure 16. Ethernet Setup Screen
Avalable setup:
MAC address - Information only. Ethernet MAC address. Cannot be
changed.
DHCP - Selects DHCP client on/off.
IP address - Configures Ethernet IP address.
Subnet Mask - Configures Ethernet subnet mask address.
Gateway address - Configures Ethernet gateway address.
Link state - Information only.
Supported Protocols:
Gamma Protocol (Running on TCP port 23)
Modbus TCP Protocol (Running on TCP port 502)
NOTE: Modbus register map is available on Gamma Vacuum
website under download section.

Page 12 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
11.14 TSP Sublimation View
Figure 17. TSP Sublimation View Screen (no control buttons)
First text line indicates current TSP status. Here ‘TSP 1 OFF’.
Second text line indicates current TSP configuration as defined in the
TSP Setup window.
Third text line indicates currently active TSP filament. This is the
filament that will be sublimated.
Available TSP status:
‘TSP Initializing’ - TSP is initializing.
‘TSP OFF’ - TSP is off.
‘TSP ON’ - TSP is currently sublimating.
‘TSP Armed’ - TSP is running programmed mode, but not currently
sublimating TSP filament.
‘TSP Armed, Supply is off’ - TSP cannot continue because Pressure
Window is set, but supply is off.
‘TSP Armed, Outside the pressure window’ - TSP cannot continue
because Pressure Window is set, but pump pressure is outside the
pressure window.
‘TSP Armed, Interlock - Active’ - TSP cannot continue because TSP
interlock is set, but not satisfied.
‘TSP Armed, Waiting – In use’ - TSP cannot continue because other
TSP is currently running the sublimation cycle.
11.15 TSP Sublimation View With Controls
Figure 18. TSP Sublimation View Screen With Controls
View Pump - Switches home screen to pump view.
Menu - Invokes main menu.
Exit - Clears screen / hides control buttons.
Turn On TSP (Turn Off TSP) - Starts TSP programmed mode
according to the parameters defined in TSP Setup window. If TSP
programmed mode is running this button will turn off TSP operation.
TSP Setup - Invokes TSP Setup screen.

Page 13 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
11.16 TSP Setup
Figure 19. TSP Setup Screen
Available setup :
Filament - Selects active filament (1-4).
Filament status reads (OK) if at the end of the firing cycle, filament
current reached 80% of current target value. A question mark (?) is
displayed if filament current did not reach 80% of the current target
value.
Current Target (A) - Configure sublimation current target level.
On Time (s) - Configures sublimation time in seconds.
Number of Cycles - Configures number of sublimation cycles to run.
Cycle period - Configures time in minutes between each sublimation
cycle.
Advance Options Configure - Invokes TSP advance options window.
TSP1/TSP2 - Selects TSP for which above parameters are configured.
11.17 TSP Pressure Window Setup
Figure 20. TSP Pressure Window Screen
Available setup :
Pressure Window - Turns on/off pressure window option.
When pressure window is enabled sublimation process will run only
if pump pressure is within the defined pressure window. If pump
pressure is outside the defined pressure window, the TSP status will
read ‘TSP Armed, Outside the pressure window’ and sublimation
process is not allowed.
Pressure High Limit - Specifies upper pressure limit.
Pressure Low Limit - Specifies lower pressure limit.
Supply Source - Specifies which supply/pump pressure reading will be
taken into consideration for pressure window.

Page 14 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
12. ERROR / STATUS CODES
Figure 21. Display Error/Status Codes Screen
12.1 Error Example ‘STANDBY, Error 02, Vacuum loss, Detected’
‘STANDBY’ - Indicates supply HV can be turned on. In comparison, ‘DISABLED’ indicates supply HV cannot be turned on.
Turning on supply HV will clear all outstanding errors not requiring user intervention.
For example, error 02 indicates vacuum loss detected while pump was running. User can turn on HV and start pump again, no other action is
required.
In comparison, error 20 indicates safeconn (HV interlock) is not satisfied. The state will read ‘DISABLED’. User cannot turn on HV until
safeconn is satisfied.
‘Error 02’ - See “Table 1. Error / Status Codes” for description of the errors.
‘Vacuum Loss’ - Short description of the error.
‘Detected’ - Indicates error status. Detected means error was detected at some time in the past, but not active anymore.
In comparison, ‘Active’ indicates error was detected and still active at this time. Addition user intervention is required to clear the error.
Table 1. Error / Status Codes
1.1 Error/
Status Code
1.2 Description
01 Too many cooldown cycles occurred during pump starting.
02 Vacuum loss detected. Output voltage dropped to less than 1.2kV while pump was running.
03 Short circuit detected during pump starting.
05 Excess power detected. Excess amount of power delivered to the pump for the configured pump size.
07 Excess pump start time. The output voltage did not reach 2kV within maximum pump starting time of 5 minutes.
12 Pump thermal runaway detected. Significant drop in voltage detected during pump starting.
20 Safeconn (HV Interlock) not satisfied. HV cannot run.
21 HV interlock not satisfied or HV switch is off. HV cannot run. See section on digital inputs for details.
22 Pump size set to 0L/s. HV cannot run.
23 Supply not calibrated. Current metering might not be accurate.
26 Supply over-temperature detected. HV cannot run.
NOTE:
If error code is not listed in the table please contact Gamma Vacuum for more information.

Page 15 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
13. REAR PANEL
Figure 22. MPCq Rear Panel
13.1 Description
Power input is a standard IEC interface.
13.2 Connector pair J501-504/J401-404, HV Output
connectors and safeconn (HV interlock) connectors
The SHV 10kV (Fisher) type connector and corresponding SMB
(mini banana) connector is supplied for each high voltage output
connection.
The SHV 10kV (Fisher) type connectors are used to relay high
voltage to the ion pump.
The SMB (mini banana) connecions are used to relay safeconn (HV
interlock) logic signal from controller to the ion pump high voltage
feedthrough.
When connection HV cable to the controller, insert mating connector
into desired J50X connection and lock the connector.
SMB (mini banana) connectors are push-on connectors. Press firmly
until the connector snaps into place.
NOTE: Other connector types available per request.
13.3 Connector J115, NET (Profibus, optional)
Standard Sub-D 9-pin female connector. Connection to Profibus
interface.
For Profibus information reference Profibus user manual, document
900033, available on Gamma Vacuum website under download
section.
13.4 Connector J505, CTRL
Standard Sub-D 15-pin female connector.
Used in combination with Remote TSP/NEG Controller to facilitate
communications between controllers. Connection is made using
straight-through Sub-D 15-pin cable available from Gamma
Vacuum (PN 380049 - length 3m, PN 380050 - length 6m, PN
380085 - length 15m, PN 380895 - length 30m).
NOTE: Connector is not installed if controller is configured with
internal TSP or NEG supply.
13.5 Connector J114, ETH
Standard RJ-45 connector. Connection to Ethernet interface.
Connector has two LED indicators:
- Green LED - Indication of link state.
- Orange LED - Indication of data activity.
13.6 Connector J510, TSP FIL (TSP, optional)
Installed in case when MPCq is configured with internal TSP supply.
Three filament, keyed TSP Pump connector.
Use high current cable to connect to Titatium Sublimation Pump
(TSP).

Page 16 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
13.7 Connector J104, Misc I/O
Standard Sub-D 37-pin female connector.
Table 2. J104 Connector Pinout
2.1 Pin 2.2 Description
1 Relay 1 Common *
2 Relay 1 NC
3 Relay 1 NO
4 Relay 2 Common *
5 Relay 2 NC
6 Relay 2 NO
7 Relay 3 Common *
8 Relay 3 NC
9 Relay 3 NO
10 Relay 4 Common *
11 Relay 4 NC
12 Relay 4 NO
13 Reserved - do not use, ground
14 Reserved - do not use, ground
15 DIGITAL OUT 1 - output, digital, 0/+5VDC, 7mA max
16 Reserved - do not use, ground
17 DIGITAL OUT 2 - output, digital, 0/+5VDC, 7mA max
18 Reserved - do not use, ground
19 DIGITAL OUT 3 - output, digital, 0/+5VDC, 7mA max
20 Reserved – do not use, output, digital, 0/+5VDC, 7mA
max
21 Reserved – do not use, output, digital, 0/+5VDC, 7mA
max
22 DIGITAL IN 1 - input, pulled-up internally to +3.3V,
ground to activate assigned function
23 DIGITAL IN 2 - input, pulled-up internally to +3.3V,
ground to activate assigned function
24 DIGITAL IN 3 - input, pulled-up internally to +3.3V,
ground to activate assigned function
25 DIGITAL IN 4 - input, pulled-up internally to +3.3V,
ground to activate assigned function
26 +12Vdc - supply, regulated, 80mA max
27 Not connected
28 Not connected
29 Reserved - do not use, ground
30 ANALOG OUT 1 - output, analog, range 0 to
+10 V D C
31 Ground
32 ANALOG OUT 2 - output, analog, range 0 to
+10 V D C
33 Ground
34 ANALOG OUT 3 - output, analog, range 0 to
+10 V D C
35 Ground
36 ANALOG OUT 4 - output, analog, range 0 to
+10 V D C
37 DIGITAL OUT 4 - output, digital, 0/+5VDC, 7mA max
* Maximum relay current 500mA, maximum voltage 28V. Common
and NC pins are connected in default or de-energized state.
13.8 Connector J112, SER
Standard Sub-D 9-pin female connector. Connection to serial
interface. Supported serial standars are RS-232, RS-485 full duplex
(four wire setup), and RS-485 half duplex (two wire setup).
Table 3. J112 Connector Pinout
3.1 RS-232 3.2 RS-485
Full Duplex (4
wire)
3.3 RS-485 Half
Duplex (2 wire)
RXD 2+T X 2+TX/+RX 2
TXD 3-TX 8-TX/-RX 8
GND 5GND 5GND 5
+RX 3
-RX 7
Cabling for RS-232 Serial Protocol
The MPCq functions as data terminal equipment (DTE) devices.
When the controller is connected to another DTE device (such as a
personal computer), a null modem serial cable or a simple 3 wire
serial crossover cable is required to connect the devices. The null
modem cable swaps the signal lines so the receive and transmit
signals are properly connected.
NOTE: For-RS 232, the serial cable between the PC and the MPCq
only needs to cross Rx and Tx pins. No other signals are
needed, except ground pin 5.

Page 17 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
14. SERIAL COMMUNICATION
Following serial protocols are supported:
Gamma Protocol
Modbus ASCII Protocol
Modbus RTU Protocol
NOTE: Modbus register map is available on Gamma Vacuum website under download section.
14.1 Gamma Procotol Over Serial Connection
Gamma Protocol Command Packet Structure Over Serial Connection
The command packet is made up of at least five fields. The minimum command packet (single command with no data) is 11 bytes long. No
new commands should be sent to the controller before the response from the previously sent command has been received.
Table 4. Command Packet Structure Over Serial Connection
START space ADDRESS space COMMAND space DATA space CHECKSUM TERMINATOR
1 byte 1 byte 2 bytes 1 byte 2 bytes 1 byte (variable) 1 byte 2 bytes 1 byte
See table below for more detail on packet structure.
4.1 Field 4.2 Size 4.3 Comment
1. START 1 ASCII character ASCII character is ‘~’ (TILDA)
Start is the first byte in the command packet and tells remote controllers to start decoding a message.
2. ADDRESS 2 ASCII hex characters Range 00 through FF
This field should be filled in with the hexadecimal representation of the integer address of the controller. The range provides 255 unique
addresses. Only 32 devices may reside on the same serial port due to hardware loading limitations.
NOTE: Must be supplied, even when running RS 232.
3. COMMAND CODE 2 ASCII hex characters Range 00 through FF
See “Table 9. Gamma Protocol Commands” on page 20 for list of available command codes. The command code must be two hex
digits, even if the first is a zero.
4. DATA field(s) As needed ACSII printable characters only
Data field(s) are for any commands that have a data value. Not all commands require data field. If command has more than one data value
associated with it, such as setting an X and a Y value, the command field could be followed by two data fields (X and Y) separated by a
comma and space between them. All data must be sent in ASCII printable format (no binary or “control” characters).
5. CHECKSUM 2 ASCII hex characters Computed checksum of packet
The calculated checksum must have its value in ASCII hexadecimal notation. It is calculated by adding the decimal value of all characters in
the packet (excluding start, checksum, and terminator), and then dividing the result by 256. The integer remainder converted to two ASCII
hex digits is the checksum. When a remote device receives a packet, the passed checksum is compared with a computed checksum and if
they do not match, the device discards the packet.
NOTE: Checksum field can be bypassed by specifying “00”.
6. TERMINATOR 1 ASCII hex character ASCII carriage return
ASCII value of carriage return character placed at the end of a command packet. There is not a space between the checksum and
terminator field.

Page 18 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
14.2 Gamma Protocol Response Packet Structure Over Serial Connection
The response packet is made up of at least five fields and contains information to let the controlling computer know the command requested
was either recognized and accepted (STATUS = “OK”), or an error condition occurred (STATUS = “ER”). The minimum packet also contains
a RESPONSE CODE that is used either to pass an error code (if STATUS = “ER”), or is available for each unit to use as needed for a STATUS
return of “OK”. The minimum response packet (simple acknowledgment with no data) would consist of the following fields, and would be 12
bytes long.
Table 5. Response Packet Structure Over Serial Connection
ADDRESS space STATUS space RESPONSE
CODE
space RESPONSE
DATA
space CHECKSUM TERMINATOR
2 bytes 1 byte 2 bytes 1 byte 2 bytes 1 byte (variable) 1 byte 2 bytes 1 byte
5.1 Field 5.2 Size 5.3 Comment
1. ADDRESS 2 ASCII hex characters Range 00 through FF
This field is filled in with the hexadecimal representation of the integer address of the unit. The range provides 255 unique addresses. The
controlling computer will use this field to determine that the correct remote unit is responding.
2. STATUS 2 ASCII hex characters Either OK or ER
This field is made up of two ASCII characters and is either OK or ER. OK indicates success in recognizing the command. ER indicates an
error condition followed by an error code. (See “Table 6. Response Code Error Codes” on page 18.)
3. RESPONSE CODE 2 ASCII hex characters Range 00 through FF
For an error condition with an incoming command, this field returns an error number to the controlling computer. For non-error conditions,
this field returns a status byte/word to the controlling computer. (See “Table 6. Response Code Error Codes” on page 18)
NOTE: If there is not an applicable error code, a “00” will be transmitted.
4. RESPONSE DATA As needed ACSII printable characters only
Data field(s) are used to respond to commands requesting data. For example, a command requesting the current voltage setting in a unit
would have the reading placed in a data field. Data must be in ASCII printable format. There is no limit on the number or size of data fields.
Data is not required for all responses.
NOTE: Optional, only required if the command code requires it.
5. CHECKSUM 2 ASCII hex characters Computed checksum of packet
Checksum contains a simple computed checksum of the command packet. The value must be in ASCII hexadecimal notation. The checksum
is calculated by adding the decimal value of all characters in this packet (including the space before the checksum field) and then dividing
the result by 256 (base 10). The integer remainder converted to two ASCII hex digits is the packet checksum. When the controlling computer
receives a response packet, the passed checksum is converted from the hex value to a binary integer and compared with a computed
checksum. If they are not the same, considers it an error, and repeats the last command.
6. TERMINATOR 1 ASCII hex characters ASCII carriage return
ASCII value of carriage return character placed at the end of a packet. There is not a space between the checksum and terminator field.
Table 6. Response Code Error Codes
6.1 Code 6.2 Description
00 Command executed successfuly.
01 Bad command format. Returned is command syntax is not valid.
02 Bad command code. Returned in command code is not valid.
03 Bad checksum. Returned if checksum is not valid.
04 Timeout. Returned if complete command packet was not received within 2 seconds from receiving the tilde start character.
06 Unknown error. Used for internal purpose.
07 Communication error. Returned if null character 0x00 is received or if buffer overflow occurred.
08 Bad parameter. Returned if command parameters are not valid.

Page 19 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
14.3 CRC Checksum Example
NOTE: A checksum of “00” will bypass checksum field verification
by the controller.
The command to be sent to the unit is
0x01 – SYS GET MODEL.
Full command is:
‘~ 01 01 XX’ + carriage return,
where XX is an unknown checksum at this time.
NOTE: This command assumes the unit address is set to 1.
1. To calculate command checksum, add decimal values of
all characters in the packet, excluding start, checksum, and
terminator. Divide result by 256 and the integer remainder
converted to two ASCII hex digits is the checksum for the
command. Table 7. Command CRC Checksum
7.1 Characters 7.2 Value
(Decimal)
7.3 Value (Hex)
space 32 0x20
0 48 0x30
149 0x31
space 32 0x20
0 48 0x30
149 0x31
space 32 0x20
Total = 290 Total = 0x122
2. Example in decimal, take 290 mod 256 and result is 34, which
converted to hex is 0x22. This is the command checksum. Example
in hex, take 0x122 mod 0x100 and result is 0x22.
This is the command checksum.
3.The command to be sent to the unit is,
‘~ 01 01 22’ + carriage return.
4. The unit will respond with, ’01 OK 00 DIGITEL MPCQ 0E’.
5.To verify checksum for the response, perform similar calculations.
Table 8. Response CRC Checksum
8.1 Characters 8.2 Value
(Decimal)
8.3 Value (Hex)
0 48 0x30
149 0x31
space 32 0x20
O79 0x4F
K75 0x4B
space 32 0x20
0 48 0x30
0 48 0x30
space 32 0x20
D68 0x44
I73 0x49
G71 0x47
I73 0x49
T84 0x54
E69 0x45
L76 0x4C
space 32 0x20
M77 0x4D
P80 0x50
C67 0x43
Q81 0x51
space 32 0x20
Total = 1326 Total = 0x52E
6.Example in decimal, take 1326 mod 256 and result is 46, which
converted to hex is 0x2E. This is the response checksum. Example
in hex, take 0x52E mod 0x100 and result is 0x2E. This is the
response checksum.
14.4 Examples - Gamma Protocol Over Serial
Connection
For example, following strings represent valid commands and
checksums, and could be sent by simply typing them into a terminal.
Do not type the “” quotes and the spaces are significant. These
examples assume unit address is set to 1 and supply 1.
NOTE: Command checksum can be set to “00” to bypass
checksum field verification by the controller.
Example 1
Command - SYS GET MODEL, 0x01
Tx – “~ 01 01 22” + carriage return.
Rx – “01 OK 00 DIGITEL MPCQ 2E” + carriage return
Example 2
Command - HV GET CURRENT, 0x0A
Tx – “~ 01 0A 01 B3” + carriage return
Rx – “01 OK 00 1.33E-11 AMPS C5” + carriage return
Example 3
Command - HV GET PRESSURE, 0x0B
Tx – “~ 01 0B 01 B4” + carriage return
Rx – “01 OK 00 1.0E-11 TORR A5” + carriage return

Page 20 of 28
Gamma Vacuum DIGITEL MPCq Users Manual
Document 900034, Rev B
14.5 Gamma Protocol Commands
Table 9. Gamma Protocol Commands
9.1 Hex
Command
9.2 Description 9.3 Data
Field
9.4 Response 9.5 Data/Response
Description
01 SYS GET MODEL
Get controller model string. DIGITEL MPCQ
02 SYS GET FIRMWARE VERSION
Get firmware version. SW Version X.XX Where: X.X is firmware version numberl
0E SYS SET PRESSURE UNITS
Set pressure units. UWhere: U is pressure units (T - Torr, M - mBar, P -
Pascal)
4F SYS TFTP SERVER ADDRESS
Configures the IP address of the TFTP
server used in the firmware upgrade
process.
If no parameter is specified, the current
address is returned.
X.X.X.X X.X.X.X Where:
X.X.X.X is the IP address of the TFTP server
8F SYS SET FIRMWARE UPDATE
Tells system firmware update is wanted.
Send the command and cycle power.
Upon power up, bootloader shall be
running.
No parameters.
ED SYS GET/SET PUMP NAME
Sets/gets pump name.
If only S parameter is specified, the
current name is returned.
S, TEXT TEXT Where:
S is supply (1-2)
TEXT is string up to 15 characters
FF SYS RESET
Restarts the system.
NWhere:
N is the reboot mode
0 = Reboot
1 = Reboot and start boot loader
3 = Reset non-vol parameters to defaults
0A HV GET CURRENT
Reads supply current SX.XE-X AMPS Where: S is supply (1-2)
0B HV GET PRESSURE
Reads supply pressure SX.XE-XX UUU Where: S is supply (1-2)
UUU is pressure units (TORR, MBAR, or
PASCAL )
0C HV GET VOLTAGE
Reads supply voltage SXXXX Where: S is supply (1-2)
0D HV GET STATUS
Reads pump status.
S, XX YY Where:
S is supply (1-2)
XX is option. Currently only option 00 is
available.
YY can be
“00” for pump standby
“01” for pump starting
“02” for pump running
“03” for pump cooldown
“04” for pump error
11 HV GET PUMP SIZE
Reads pump size. S N L/S Where: S is supply (1-2)
N is pump size
12 HV SET PUMP SIZE
Sets pump size. S, N Where: S is supply (1-2)
N is pump size
1D HV GET PUMP PRESSURE FACTOR
Reads the pump pressure factor. SN.NN Where: S is supply (1-2)
N.NN is pump pressure factor (0.01 - 9.99)
1E HV SET PUMP PRESSURE FACTOR
Sets the pump pressure factor. S, N.NN Where: S is supply (1-2)
N.NN is pump pressure factor (0.01 - 9.99)