Spellman SLM20-300, SLM1-300, SLM3-300, SLM15-300, SLM30-300 Instruction Manual

R

Instruction Manual

SLM SERIES

High Voltage Power Supply

MODEL :
SERIAL# :
DATE :

SPELLMAN
HIGH VOLTAGE ELECTRONICS
CORPORATION

475 Wireless Blvd.
Hauppauge, New York, 11788

[phone]*FAX: [phone]*
E-mail: [e-mail]
Website: www.spellmanhv.com

SLM MANUAL 118072-001 Rev A

PAGE 1 OF 3

SPELLMAN HIGH VOLTAGE ELECTRONICS CORPORATION

300W-1200W HIGH
VOLTAGE MODULE

Spellman’s SLM Series of high voltage modules are
designed for OEM applications up to 70kV at 1200 watts.
Its universal input, small package size and choice of three
standard digital interfaces simplifies integrating the SLM
into your system design. Models are available in either
positive or negative polarity. The SLM is fully arc and
short protected. Excellent regulation specifications are
provided along with outstanding stability performance.

TYPICAL APPLICATIONS

Capacitor Charging
HiPot Testing
CRT Testing
Electrostatics
E Beam Systems
CW Lasers

FIRMWARE CONFIGURATIONS

STANDARD BASED FEATURES

AOL Adjustable Overload Trip
AT Arc Trip
NAD No Arc Detect
NSS No Slow Start
PSS Programmable Slow Start
RFR Remote Fault Reset
RMI Remote Mode Indicators
ROV Remote Overvoltage Adjust

SPECIFICATIONS

Input Voltage:

Power factor corrected input, ≥0.98
90-264Vac, 47-63 Hertz, for 300 watt units
180-264Vac, 47-63 Hertz for 600 and 1200 watt units

Output Voltage:

11 models—1kV to 70kV

Output Polarity:

Negative or positive, specify at time of order

Local Indicators:

Arc, HV On, Temp Error, OVP, I Mode
Power On, OC, Reg Error

Power:

3 power ranges available—300, 600 and 1200 watts.
Other power levels available on special order.

Voltage Regulation:

≤0.01% of rated output voltage over specified
input voltage range
≤0.01% of rated output voltage for a full load change

Current Regulation:

≤0.01% of rated output current over specified
input voltage range

≤0.01% of rated output current for a ±100μA
for a full voltage change

Ripple:

≤0.2% rms of maximum rated voltage,
measured with a 10 foot long HV cable

Stability:

≤50ppm/hr after a 2 hour warm up

Temperature Coefficient:

≤100ppm per degree C

Environmental:

Temperature Range:

Operating: 0˚C to 40˚C
Storage: -40˚C to 85˚C

Humidity:

20% to 85% RH, non-condensing.

Control Interface

Local Interface:

Potentiometers are provided to adjust voltage and current.

Remote Interface: USB, Ethernet and RS-232 are standard,

implemented with 12 bits of resolution.
All digital monitors have an accuracy specification of 2%.

Control Software: A VB GUI will be provided for

RS-232/USB, the Ethernet interface will have an
embedded applet for control.

HV Control Enable/Interlock:

A dry contact, hardware based interlock is provided for
remote mode. In local mode this I/O is the enable.

Monitor Signals:

Voltage and current monitor signals are scaled 0-10Vdc
equals 0-100% of full scale, accuracy is 1%.

Cooling:

Forced air

Dimensions:

300/600 watts:

4.75˝ H X 6˝ W X 12˝ D (120.65mm x 152.4mm x 304.8mm)
1200 watts:

4.75˝ H X 12˝ W X 12˝ D (120.65mm x 304.8mm x 304.8mm)

Weight:

300/600 watts: 14 pounds (6.35kg)
1200 watts: 26 pounds (11.8kg)

• Compact & Lightweight

• Models from 1kV-70kV, 300W, 600W AND 1200W

• Universal Input, Power Factor Corrected

• Low Cost Modular Design

• Standard Digital Interfaces: USB,

Ethernet and RS-232

• CE Compliant, UL Recognized

SLM

1200W

300W-600W

www.spellmanhv.com/manuals/SLM

Corporate Headquarters

Hauppauge, New York USA

[phone] FAX: [phone]

e-mail: [e-mail]

www.spellmanhv.com

128035-001 REV. M

Spellman High Voltage is an ISO 9001:2008 and ISO 14001:2004 registered company

Copyright © 2006 Spellman High Voltage Electronics Corp.

ETHERNET DIGITAL INTERFACE—
J5 8 PIN RJ45 CONNECTOR

PIN SIGNAL SIGNAL PARAMETERS

1 TX+ Transmit Data +
2 TX- Transmit Data ­3 RX+ Receive Data +
4 NC No Connection
5 NC No Connection
6 RX- Receive Data ­7 NC No Connection
8 NC No Connection

PAGE 2 OF 3

SLM SELECTION TABLE- 300W

300 Watt

kV mA Model

1 300 SLM1*300
3 100 SLM3*300
5 60 SLM5*300
10 30 SLM10*300
15 20 SLM15*300
20 15 SLM20*300
30 10 SLM30*300
40 7.5 SLM40*300
50 6 SLM50*300
60 5 SLM60*300
70 4.28 SLM70*300

RS-232 DIGITAL INTERFACE—
J3 9 PIN FEMALE D CONNECTOR

PIN SIGNAL SIGNAL PARAMETERS

1 NC No Connection
2 TX out Transmit Data
3 RX in Receive Data
4 NC No Connection
5 SGND Ground
6 NC No Connection
7 NC No Connection
8 NC No Connection
9 NC No Connection

*Specify “P” for positive polarity or “N” for negative polarity

USB DIGITAL INTERFACE—
J4 4 PIN USB “B” CONNECTOR

PIN SIGNAL SIGNAL PARAMETERS

1 VBUS +5 Vdc
2

D- Data ­3 D+ Data +
4 GND Ground

SLM ANALOG INTERFACE—
J2 15 PIN MALE D CONNECTOR

PIN SIGNAL SIGNAL PARAMETERS

1 Power Supply Fault Open Collector, 35V @ 10mA Maximum
2

Current Program In 0 to 10V=0 to 100% Rated Output, Zin=10MΩ
3 Voltage Program In 0 to 10V=0 to 100% Rated Output, Zin=10MΩ
4 NC No Connection
5 Local Voltage Prog. Multi-turn front panel potentiometer
6 NC No Connection
7 Local Current Prog. Multi-turn front panel potentiometer
8 Voltage Monitor 0 to 10V=0 to 100% Rated Output, Zout =4.99k, 1%
9 Signal Ground Ground

10 Current Monitor 0 to 10V=0 to 100% Rated Output, Zout =4.99k, 1%
11 HV Enable Input Connect to Pin 12 to HV Enable Supply
12 HV Enable Output +15V @ Open, ≤15mA @ Closed
13 NC No Connection
14 HV On Output Signal Open Collector, 35V @10mA Maximum
15 Spare No Connection

SPELLMAN HIGH VOLTAGE ELECTRONICS CORPORATION

300W-1200W HIGH
VOLTAGE MODULE

SLM

SLM SELECTION TABLE- 600W

600 Watt

kV mA Model

1 600 SLM1*600
3 200 SLM3*600
5 120 SLM5*600
10 60 SLM10*600
15 40 SLM15*600
20 30 SLM20*600
30 20 SLM30*600
40 15 SLM40*600
50 12 SLM50*600
60 10 SLM60*600
70 8.56 SLM70*600

*Specify “P” for positive polarity or “N” for negative polarity

SLM SELECTION TABLE- 1200W

1200 Watt

kV mA Model

1 1200 SLM1*1200
3 400 SLM3*1200
5 240 SLM5*1200
10 120 SLM10*1200
15 80 SLM15*1200
20 60 SLM20*1200
30 40 SLM30*1200
40 30 SLM40*1200
50 24 SLM50*1200
60 20 SLM60*1200
70 17.14 SLM70*1200

*Specify “P” for positive polarity or “N” for negative polarity

Input Line Connector:

IEC320 cord set with integrated EMI filter

Output Cable:

A detachable 10’ (3.3m) long shielded HV cable is provided

Regulatory Approvals:

Compliant to 204/108/EC, the EMC Directive and 2006/95/EC,
the Low Voltage Directive. UL/CUL recognized, File 227588.

Corporate Headquarters

Hauppauge, New York USA

[phone] FAX: [phone]

e-mail: [e-mail]

www.spellmanhv.com

128035-001 REV. M

Spellman High Voltage is an ISO 9001:2008 and ISO 14001:2004 registered company

Copyright © 2006 Spellman High Voltage Electronics Corp.

PAGE 3 OF 3

SPELLMAN HIGH VOLTAGE ELECTRONICS CORPORATION

300W-1200W HIGH
VOLTAGE MODULE

SLM

DIMENSIONS: in.[mm]

FRONT VIEW

BOTTOM VIEW

12.00 [304]

4.75 [120]

10.50 [266]

0.75 [19]

10-32 BLIND
PEMS
4 PLCS

6.00 [152]

1.06 [27]

3.88 [99]

DANGER

HIGH

VOLTAGE

SIDE VIEW

J2 CONTROL I/O

FILAM

ENT

J4

USB

J5

ETHERNET

J3

RS 232

FRONT VIEW

BOTTOM VIEW

4.75 [120]

10.50 [266]

0.75 [19]

1.06 [27]

9.875 [250.36]

SIDE VIEW

10-32 BLIND
PEMS
4 PLCS

DANGER

HIGH

VOLTAGE

J2 CONTROL I/O

FILAM

ENT

J4

USB

J5

ETHERNET

J3

RS 232

AIR

FLOW

AIR

FLOW

1200 Watt

300/600 Watt

Corporate Headquarters

Hauppauge, New York USA

[phone] FAX: [phone]

e-mail: [e-mail]

www.spellmanhv.com

128035-001 REV. M

Spellman High Voltage is an ISO 9001:2008 and ISO 14001:2004 registered company

Copyright © 2006 Spellman High Voltage Electronics Corp.

IMPORTANT SAFETY PRECAUTIONS

SAFETY

THIS POWER SUPPLY GENERATES VOLTAGES THAT ARE DANGEROUS AND MAY BE FATAL.

OBSERVE EXTREME CAUTION WHEN WORKING WITH THIS EQUIPMENT.

High voltage power supplies must always be grounded.

Do not touch connections unless the equipment is off and the

Capacitance of both the load and power supply is discharged.

Allow five minutes for discharge of internal capacitance of the power supply.

Do not ground yourself or work under wet or damp conditions.

SERVICING SAFETY

.

Maintenance may require removing the instrument cover with the power on.

Servicing should be done by qualified personnel aware of the electrical hazards.

WARNING note in the text call attention to hazards in operation of these units

that could lead to possible injury or death.

CAUTION notes in the text indicate procedures to be followed to avoid possible

damage to equipment.

Copyright © 2000, Spellman High Voltage Electronics Corporation. All Rights Reserved.

This information contained in this publication is derived in part from proprietary and patent data. This information has

been prepared for the express purpose of assisting operating and maintenance personnel in the efficient use of the

model described herein, and publication of this information does not convey any right to reproduce it or to use it for

any purpose other than in connection with installation, operation, and maintenance of the equipment described.

118004-001 REV. B

WICHTIGE SICHERHEITSHINWEISE

SICHERHEIT

DIESES HOCHSPANNUNGSNETZTEIL ERZEUGT LEBENSGEFÄHRLICHE HOCHSPANNUNG.

SEIN SIE SEHR VORSICHTIG BEI DER ARBEIT MIT DIESEM GERÄT.

Das Hochspannungsnetzteil muß immer geerdet sein.

Berühren Sie die Stecker des Netzteiles nur, wenn das Gerät ausgeschaltet ist und die elektrischen

Kapazitäten des Netzteiles und der angeschlossenen Last entladen sind.

Die internen Kapazitäten des Hochspannungsnetzteiles benötigen ca. 5 Minuten, um sich zu entladen.

Erden Sie sich nicht, und arbeiten Sie nicht in feuchter oder nasser Umgebung.

SERVICESICHERHEIT

Notwendige Reparaturen können es erforderlich machen, den Gehäusedeckel während des Betriebes zu

entfernen.

Reparaturen dürfen nur von qualifiziertem, eingewiesenem Personal ausgeführt werden.

“WARNING” im folgenden Text weist auf gefährliche Operationen hin, die zu Verletzungen oder zum Tod

führen können.

“CAUTION” im folgenden Text weist auf Prozeduren hin, die genauestens befolgt werden müssen, um

eventuelle Beschädigungen des Gerätes zu vermeiden.

118004-001 REV. B

PRECAUTIONS IMPORTANTES POUR VOTRE SECURITE

CONSIGNES DE SÉCURITÉ

CETTE ALIMENTATION GÉNÈRE DES TENSIONS QUI SONT DANGEUREUSES ET PEUVENT ÊTRE FATALES.

OYEZ EXTRÊMENT VIGILANTS LORSQUE VOUS UTILISEZ CET ÉQUIPEMENT.

S

Les alimentations haute tension doivent toujours être mises à la masse.

Ne touchez pas les connectiques sans que l’équipement soit éteint et que la capacité à la fois de la charge et de

l’alimentation soient déchargées.

Prévoyez 5 minutes pour la décharge de la capacité interne de l’alimentation.

Ne vous mettez pas à la masse, ou ne travaillez pas sous conditions mouillées ou humides.

CONSIGNES DE SÉCURITÉ EN CAS DE REPARATION

La maintenance peut nécessiter l’enlèvement du couvercle lorsque l’alimentation est encore allumée.

Les réparations doivent être effectuées par une personne qualifiée et connaissant les risques électriques.

Dans le manuel, les notes marquées « WARNING » attire l’attention sur les risques lors de la manipulation de ces

équipements, qui peuvent entrainer de possibles blessures voire la mort.

Dans le manuel, les notes marquées « CAUTION » indiquent les procédures qui doivent être suivies afin d’éviter

d’éventuels dommages sur l’équipement.

118004-001 REV. B

IMPORTANTI PRECAUZIONI DI SICUREZZA

SICUREZZA

QUESTO ALIMENTATORE GENERA TENSIONI CHE SONO PERICOLOSE E

POTREBBERO ESSERE MORTALI.

PONI ESTREMA CAUTELA QUANDO OPERI CON QUESO APPARECCHIO.

Gli alimentatori ad alta tensione devono sempre essere collegati ad un impianto di terra.

Non toccare le connessioni a meno che l’apparecchio sia stato spento e la capacità interna

del carico e dell’alimentatore stesso siano scariche.

Attendere cinque minuti per permettere la scarica della capacità interna dell’alimentatore

ad alta tensione.

Non mettere a terra il proprio corpo oppure operare in ambienti bagnati o saturi d’umidità.

SICUREZZA NELLA MANUTENZIONE.

Manutenzione potrebbe essere richiesta, rimuovendo la copertura con apparecchio

acceso.

La manutenzione deve essere svolta da personale qualificato, coscio dei rischi elettrici.

Attenzione alle AVVERTENZE contenute nel manuale, che richiamano all’attenzione ai

rischi quando si opera con tali unità e che potrebbero causare possibili ferite o morte.

Le note di CAUTELA contenute nel manuale, indicano le procedure da seguire per evitare

possibili danni all’apparecchio.

118004-001 REV. B

Table of Contents

PAGE

1. INTRODUCTION

1.1 Description of the SLM Series.............................................................................1

1.2 SLM Specifications..............................................................................................1

1.3 Standard Features.................................................................................................2

1.4 System Status and Fault Diagnostic Display .......................................................3

1.5 Interpreting the Model Number ...........................................................................4

2. INSPECTION & INSTALLATION

2.1 Initial Inspection ..................................................................................................5

2.2 Mechanical Installation........................................................................................5

3. OPERATING INSTRUCTIONS

3.1 Operation .............................................................................................................7

3.2 Standard Features.................................................................................................8

4. PRINCIPLES OF OPERATION

4.1 AC to DC Rectifier and Associated Circuits .......................................................13

4.2 High Frequency Inverter......................................................................................13

4.3 High Voltage Circuits..........................................................................................13

4.4 Control Circuits....................................................................................................14

4.5 Options.................................................................................................................14

5. OPTIONS

5.7 Custom Designed Models....................................................................................15

6. MAINTENANCE

6.1 Periodic Servicing................................................................................................16

6.2 Performance Test .................................................................................................16

6.3 High Voltage Dividers .........................................................................................16

7. FACTORY SERVICE

7.1 Warranty Repairs .................................................................................................17

7.2 Factory Service Procedures .................................................................................17

7.3 Ordering Options and Modifications ...................................................................17

7.4 Shipping Instructions ...........................................................................................17

APPENDIX

A. Specification Controls (Custom Models Only)

SLM MANUAL i 118073-001 Rev C

Chapter 1

 Output Voltage:

22 models: 1kv to 70kv

INTRODUCTION

1.1 Description of the SLM Series

he SLM Series of high voltage generator modules are
designed for OEM applications up to 70kV and up to

T

1200watts. Its universal input, small package size and
choice of three standard digital interfaces simplifies
integrating the SLM into your system. DSP based control
circuitry provides excellent regulation, along with
outstanding stability performance. User programmable
firmware option makes the operation of the SLM flexible.

The dramatically reduced size of the SLM module,
compared to traditional high voltage modules, is obtained
by a state of the art off-line resonant converter. The
resonant converter utilizes a unique control scheme,
which allows constant frequency operation while
maintaining high efficiency. The high efficiency is
obtained by zero current switching (ZCS) resonant
control. High operating frequency, typically 50 kHz,
allows for low ripple and excellent dynamic response
capabilities.

The DC output voltage and current are controllable over
the full range of operation. Monitoring and control
signals are provided for simple, yet flexible control of the
power supply. The SLM series operates from 90 ­265Vac, at 50/60 Hz single phase for the 300Watt models
and 180–264Vac, at 50/60 Hz single phase for the
600Watt and 1200Watt models. The input is power
factor corrected and the SLM series operates at full power
continuous. The ambient temperature must be kept below
the maximum rating as specified in 1.2. The standard
warranty applies to the modules. Consult factory about
the warranty for custom SLM modules.

1.2 SLM Specifications

 Input Voltage:

90-264Vac 47-63Hz, for 300watt models

180-264Vac 47-63Hz, for 600watt models

180-264Vac 47-63Hz, for 1200watt models

 Power Factor:

FL: ≥ 0.99

 Voltage Regulation:

≤ 0.01% of rated output voltage over specified input
voltage range
≤ 0.01% of rated output voltage for a full load

change

 Current Regulation:

≤ 0.01% of rated output current over specified input
voltage range
≤ 0.01% of rated output current for a ±100μA for a
full voltage change

 Ripple: ≤ 0.2% rms of maximum rated voltage,

measured with a 10 foot long HV cable

 Polarity: Positive or Negative polarity with respect

to ground. (Specify at time of ordering).

 Stability: ≤ 50ppm/hr after a 2 hour warm up
 Temperature Coefficient: ≤ 100ppm / C.
 Temperature:

Operating: 0C to 40C
Storage: -40C to +85
Humidity: 20% to 85% RH, non-condensing

Control Interface

 Local Interface: Voltage and current are externally

programmable over the entire range from zero to
maximum rating via 0-10VDC input.

 +10Vdc Reference: A +10Vdc reference is provided

for local programming via two potentiometers to be
used to adjust voltage and current.

 Remote Interface: USB, Ethernet and RS232 are

standard, implemented with 12 bits of resolution.
All digital monitors have an accuracy specification of
2%.

 Control Software: A VB GUI will be provided for

RS-232/USB, the Ethernet interface will have an
embedded applet for control.

 Monitor Signals:

Voltage and current monitor signals are scaled 0­10Vdc equals 0-100% of full scale. Accuracy is 1

.

%.

SLM MANUAL 1 118073-001 Rev C

 HV Control Enable/Interlock:

A dry contact, hardware based interlock is provided

for remote mode. In local mode this I/O is the enable.

IMPORTANT

This control signal in not a safety

interlock and should not be used for

protection from high voltage generation

for safety purposes.

 Cooling:

Forced air

 Dimensions:

4.75˝ H X 6˝ W X 12˝ D (120.65mm x 152.4mm x

304.8mm)

 Weight:

14 pounds (5.44kg)

 Input Line Connector:

IEC320 cord set with integrated EMI filter

 Output Cable:

A detachable 10’ (3.3m) long shielded HV cable is

provided

1.3 Standard Features

The SLM series incorporates several standard features
designed to optimize user operation.

Standard Firmware Configurable
Features:

Slow Start:

Provides a gradual increase in high voltage output until
the maximum set point is reached. This ramp time can be
configured in the firmware from 0.1 seconds to 60
seconds, and is stored internally in the SLM memory. The
factory default setting is 5 seconds.

Adjustable Overload Trip: AOL

The overload trip protection feature shuts down the high
voltage output when the current exceeds the limit set by
the current control. The DSP inhibits the generation of
high voltage and reverts the unit to HV OFF mode,
illuminating the OVER CURRENT indicator. This can
be enabled in the firmware and is stored internally in the
SLM memory. When AOL is disabled the default
overcurrent trip point is 110% of full-scaled output. The
factory default setting for AOL is disabled.

Remote Overvoltage Adjust: ROV

The overvoltage trip protection feature shuts down the
high voltage output when the voltage exceeds the limit
configured in the firmware. The DSP inhibits the
generation of high voltage and reverts the unit to HV OFF
mode, illuminating the OVER VOLTAGE indicator.
This can be enabled in the firmware and is adjustable
from 0% to 110% of full-scaled output voltage. The select
values are stored internally in the SLM memory. When
ROV is disabled the default overvoltage trip point is
110% of full-scaled output. The factory default setting for
ROV is disabled.

ARC Trip: AT

The SLM provides firmware configurable arc detection.
The user can set the arc detection parameters to custom fit
their requirements. The follow parameters are
programmable in the firmware and are
the SLM memory:

Arc Count:
This sets how many arc’s are require within the selected
time period to cause an arc shutdown. It is programmable
from 1 arc to 20 arc. The factory default setting is 8 arc.

Time Period:
This sets the time period that the selected arc count must
occur within to cause an arc shutdown .It is
programmable from 1 second to 60 seconds.
default setting is 20 seconds.

Quench Time:
This sets the length of time that the high voltage is
shutdown to quench the arc after an arc occurs. It is
programmable from 100ms to 500ms. The factory default
setting is 500ms.

Re-Ramp:
After an arc occurs, the kV output will slow start at the
programmed ramp time. If Re-ramp is disabled then there
will be no ramping after an arc. The factory default
setting is enabled.

The SLM will not accept Arc Count and Time Period

setting that exceed 1 arc per second.

No Arc Detect: NAD

When No Arc Detect mode (NAD) is enabled, the HVPS
has no arc shutdown protection. The HVPS is designed to

handle an arc rate of 1 arc per second.

stored internally in

The factory

Exceeding 1 arc
per second could cause damage to the HVPS.
HVPS failure caused by excessive arc will not be
covered under the warranty

setting for NAD is disabled.

. The factory default

SLM MANUAL 2 118073-001 Rev C

Watchdog Timer

If there is no communication between the HVPS and the
host computer for more than 10 seconds the HV output
will shutdown and the Watchdog Timer fault will be sent
via the digital communication when and if
communication is resumed. This can be enabled via the
digital communication and is defaulted to disable upon
power up.

Standard Input Features:

Power Factor and Universal Input: The input voltage

of the SLM can operate within the range from 90Vac to
265Vac for the 300Watt model and at 180–264Vac, for
the 600Watt model. The power factor is actively
corrected across this entire range and is better than 0.99 at
full load.

Internal EMI Filter and Fuse Protection: An internal

EMI filter and fuse provide protection against line voltage
surges and power supply faults.

Remote Operating Features

Remote Control: USB, Ethernet and RS232 are standard.

A provided G.U.I allow user to control the unit via RS232
and USB interfaces. An imbedded Applet web browser
allow user to control the unit via Ethernet. Refer to SLM
digital protocol spec for details.

Remote Monitor: Allows remote monitoring of the

Output voltage, current, HV On clock counter, and user
configurable firmware features via the USB, Ethernet or
RS232.

Remote Programming: Allows remote programming of

the output voltage, current and user configurable firmware
features via the USB, Ethernet or RS232.

HV Enable/Interlock: In local mode, allows remote

ON/OFF control of the high voltage. In remote mode, the
hardware based dry contact closure must be closed in
order to enable the high voltage via the USB, Ethernet or
RS232.

 OVER CURRENT FAULT: Indicates the over

current protection circuitry has caused the high
voltage to turn off. This fault will occur if the output
current exceeds 110% of full scale. If AOL is enable
this fault will occur when the current exceeds the
current program set point. This fault is indicated by
illumination of over current LED status on the front
panel and via RS-232, USB or Ethernet as Over
Current.

 OVERVOLTAGE: Indicates the over voltage

protection circuitry has caused the high voltage to
turn off. This fault will occur if the output voltage
exceeds 110% of full scale. If ROV is enable this
fault will occur when the voltage exceeds the
programmed ROV setpoint. This fault is indicated by
over voltage LED status on the front panel and via
the RS-232, USB or Ethernet as Over Voltage.

 ARC FAULT: Indicates that the programmed arc

count was exceeded within programmed time period.
This fault is indicated by steady state illumination of
Arc Fault LED status on front panel and via RS-232,
USB or Ethernet as Arc Fault. The LED will pulse
for each arc, but will be a steady state ON if a
shutdown occurs.

 REGULATION ERROR: Indicates a failure in the

voltage, current or power regulation circuitry. This
fault usually occurs when there is a lack of output
power to maintain regulation. This fault is indicated
by illumination of the Regulation Error LED status
on front panel and via RS-232, USB or Ethernet as
Under Current.

 OVER TEMPERATURE: Indicates either a failure

in the cooling system that would cause the internal
heat sink temperature to exceed the operating range
or the ambient temperature to exceed 40 degrees C,
resulting in shutdown of HV. This fault is indicated
by Over Temperature LED status on the front panel
and via RS-232, USB or Ethernet as Over
Temperature.

1.4 System Status and Fault
Diagnostic Display

If a fault occurs, the power supply will revert to the
Shutdown mode indicated by extinguishing of HV ON
LED and via RS-232 as HV OFF. To reset a fault in local
mode the enable must be reset. To reset a fault in remote
mode a HV ON or a RESET FAULTS command must be
sent via the RS-232, USB or Ethernet.

SLM MANUAL 3 118073-001 Rev C

 PS Fault Indication: PS Faults an open collector

output with a 1k ohm impedance on J2-1, indicates
that a faults has occurred. High = no faults

 HV On Indication: HV On Signal is an open

collector output with a 1k ohm impedance on J2-14,
indicates that HV is enabled. High = HV OFF

 HV On LED: When the high voltage status is “On”

state it is indicated by HV ON LED status on the
front panel.

 Power On LED: When the input power is applied to

the unit it is indicated by PWR ON LED status on the
front panel.

 I MODE: Indicates the output current regulator

circuit is maintaining current regulation. This is

indicated by I Mode LED status on the front panel
and via RS-232, USB or Ethernet as I Mode.

1.5 Interpreting the Model Number:

The model number of the power supply describes its
capabilities. After the series name is:

(1) The maximum voltage in kilovolts.
(2) The polarity of the output – positive (P), or

negative (N).

(3) The maximum output in watts.
(4) Custom “X” number representing details listed

in a separate specification control drawing.

SLM 70 P 600/X(#)

Serie
Nam

Maximu
Voltag

Polarity

Maximu
Powe

Custo

"X" Number

WARNING

TOP COVER

FRONT PANEL

J6

HV OUT

J1 AC INPUT

CURRENT MODE

HV 0N

OVER CURRENT

OVER TEMPERATURE

STATUS LIGHTS

J2 CONTROL I/O

J3

RS232

REGULATION ERROR
PWR ON

LOCAL CURRENT ADJ

LOCAL VOLT ADJ

ARC
OVER VOLTAGE

J5

ETHERNET

J4

USB

Figure 1.1 LED Legend and Connector Assignment

(shown 300W and 600W)

SLM MANUAL 4 118073-001 Rev C

Chapter 2

INSPECTION AND
INSTALLATION

nitial inspection and preliminary checkout procedures
are recommended. For safe operation, please follow

I

the step-by-step procedures described in Chapter 3,

Operating Instructions.

2.1 Initial Inspection

Inspect the package exterior for evidence of damage due
to handling in transit. Notify the carrier and Spellman
immediately if damage is evident. Do not destroy or
remove any of the packing material used in a damaged
shipment. After unpacking, inspect the panel and chassis
for visible damage.

Fill out and mail the Warranty Registration card
accompanying the unit. Standard SLM high voltage
power supplies and components are covered by warranty.
Custom and special order models (with an X suffix in the
model number) are also covered by warranty.

1KV - 50KV

2.2 Mechanical Installation

The SLM series module power supplies are
designed for installation into existing or newly
developed OEM equipment. The power supply
can also easily fit into bench top applications or
test set requirements. Standard unit dimensions
are shown in Figure 2.1

For custom mounting requirements or specific
package size requirements consult Spellman’s
Sales Department. Spellman has many package
designs available, or can design a specific
enclosure for your requirements.

60KV - 70KV

1.06 3.88

12.00

4.75

6.00

4.75

10.50

.75

12.00

4X 10-32 FEMALE THD

BOTTOM VIEW

6.00

Figure 2.1 Unit Dimensions (300W and 600W)

SLM MANUAL 5 118073-001 Rev C

Figure 2.2 Unit Dimensions (1200W)

SLM MANUAL 6 118073-001 Rev C

Chapter 3

OPERATING INSTRUCTIONS

3.1 Operation

WARNING

THIS EQUIPMENT GENERATES

DANGEROUS VOLTAGES THAT MAY BE

FATAL. PROPER GROUNDING OF ALL HIGH

VOLTAGE EQUIPMENT IS ESSENTIAL.

IMPORTANT:

Before connecting the power supply to the

AC line, follow this step-by-step procedure.

Do not connect the power supply to the AC

line until Step F is reached.

Failure to follow these procedures may void

the warranty.

A) Insure that the high voltage cable is properly

installed and terminated to the load. Insure that all
circuits connected to the high voltage output are safely
interlocked against accidental contact. Insure external
load is discharged.

B) Check the input voltage rating on the serial

nameplate of the supply and make certain that this is the
rating of the available power source

C) PROPER GROUNDING TECHNIQUE: The

chassis of high voltage power supplies must be grounded,
preferably to a water system ground using copper pipe or
other earth ground. A ground stud is provided on the front
panel. See Figure 3.1 for a typical operating setup. The
return line from the load should be connected to the
power supply chassis. Using a separate external ground
at the load is not recommended. An IEC 320 connector is
provided for connection to the line voltage source. A
standard line cord is also provided.

D) Hook-up: Connect control and monitoring

connections as described in this manual.

E) For initial turn-on, program the voltage and

current for zero output. Connect the enable/disable signal
to disable.

F) The input power cable may now be connected to

the AC power line.

G) Enable the power supply via the enable/disable

hardware based, dry contact closure.

H) Slowly program the output voltage and current

to desired level. Monitor the output voltage and current
via the monitoring test points. Note equipment operation
is normal, i.e. load is behaving as predicted.

I) To turn high voltage off, use the enable/disable

signal. If equipment is to be kept off for extended
periods, disconnect power supply from line voltage
source.

WARNING

AFTER TURNOFF, DO NOT HANDLE THE LOAD

UNTIL THE CAPACITANCE HAS BEEN

DISCHARGED!

LOAD CAPACITANCE MAY BE DISCHARGED BY

SHORTING TO GROUND.

WARNING

THE VOLTAGE MONITOR ON THE POWER

SUPPLY FRONT PANEL DOES NOT READ THE

OUTPUT VOLTAGE WHEN THE POWER IS

TURNED OFF, EVEN IF A CHARGE STILL

EXISTS ON THE LOAD.

CAUTION

ALWAYS OPERATE THE UNIT WITH THE COVER

ON. DO NOT ATTEMPT TO ACCESS OR REPAIR

ANY INTERNAL CIRCUITS. DANGEROUS AND
LETHAL VOLTAGES ARE GENERATED INSIDE

THE MODULE.

SLM MANUAL 7 118073-001 Rev C

J2 CONTROL I/O

USB

J4

J5

ETHERNET

HV OUT

OUTPUT

LOAD

OUTPUT RETURN

Figure 3.1 Proper Grounding Technique

3.2 Standard Features

A note on remote interface circuitry and remote signal
grounding: whenever possible, electrical isolation should
be provided when interfacing with any high voltage
power supply. For enable/disable signal connections, an
isolated relay or optocoupler should be used. For PS
Fault indication an optocoupler should be used. If
possible, analog programming and monitoring signals
should be isolated via analog isolation amplifiers.
Spellman application engineers are available to assist in
interface circuitry design. All interface cables should be
properly shielded. All power supply signals should be
referenced to the power supplies signal ground or power
supply chassis ground

Local Programming potentiometers: The voltage and

current controls on the front panel can be used as follows:
For local current control, jump J2-2 to J2-7. For local
voltage control, jump J2-3 to J2-5. See Figure 3.2.

LOCAL PROGRAMMING: Allows local adjustment

of the output voltage and current level via an external
voltage source. 0-10Vdc signal is supplied to pin 3 of the
J2 for voltage programming and 0-10 Vdc signal is
supplied to Pin 2 J2 for current programming.
Programming signals should be referenced to Pin 9 of J2,
signal ground. By adjusting the voltage source from 0
volts (zero output) to 10 Vdc (full rated output) the
desired output can be selected. See Figure 3.3 for wiring
diagram and specifications.

Local Monitoring: Monitor outputs are made available

for monitoring the voltage and current output. The
monitor outputs are always positive regardless of the
output polarity, where zero 0 to 10 Vdc equals 0-100% of

J3J6

HAZARDOUS VOLTAGE PRESENT

output. See Figure 3.4 for monitoring wiring and see data
sheet for pin outs.

HV Enable/Interlock: In Local Mode allows ON/OFF

control of the high voltage. The hardware based dry
contact closure must be closed in to enable the high
voltage. In Remote Mode this I/O acts as an Interlock.
The hardware based dry contact closure must be closed in
order to enable the high voltage via the USB, Ethernet or
RS232. This can be done by connecting pins 11 and 12
on J2. See Figure 3.5.

REMOTE PROGRAMMING:

After establishing communication with the UUT as per
the SLM Digital Protocol spec. Switch the UUT to Remote
Mode by sending a Program Local/Remote Mode
command (this is done automatically upon opening of the
Spellman GUI/APPLET).If the unit is in Local Mode and
enabled prior to switching it to Remote Mode, the UUT
will shutdown and a P.S Fault indictor will occur when it
is switch to Remote Mode. A clear command can be sent

to clear this fault.
Remote Control: USB, Ethernet and RS232 are standard

Refer to SLM Digital Protocol spec for Details.

Remote Monitor: Allows remote monitoring of the

Output voltage and current via the USB, Ethernet or
RS232.

Remote Programming: Allows remote programming of

the Output voltage and current via the USB, Ethernet or
RS232.

SLM MANUAL 8 118073-001 Rev C

WARNING

It is extremely dangerous to use this

circuit to inhibit high voltage generation

for the purpose of servicing or

approaching any area of load considered

unsafe during normal use.

Figure 3.2 Local Programming Via Internal Front Panel Pot Voltage Source.

SLM MANUAL 9 118073-001 Rev C

Figure 3.3 Local Programming via External Voltage Source

SLM MANUAL 10 118073-001 Rev C

Figure 3.4 Remote Monitoring

SLM MANUAL 11 118073-001 Rev C

RELAY

Figure 3.5 Enable/Interlock Logic Control

WARNING

It is extremely dangerous to use this

circuit to inhibit high voltage generation

for the purpose of servicing or

approaching any area of load considered

unsafe during normal use.

SLM MANUAL 12 118073-001 Rev C

Chapter 4

PRINCIPLES OF OPERATION

he SLM Series of high voltage power supplies
utilizes sophisticated power conversion technology.

T

Advanced analog and power conversion techniques
are used in the SLM series. The intention of the
Principles of Operation is to introduce the basic function
blocks that comprise the SLM power supply. For details
on a specific circuit, consult Spellman’s Engineering
Department.

The SLM power supply is basically an AC to DC power
converter. Within the power supply, conversions of AC
to DC then to high frequency AC, then to high voltage
DC take place.

Typical SLM power supplies comprise a few basic
building blocks. These are: 1) AC to DC rectifier, 2)
Power Factor correction boost circuitry 3) High frequency
quasi-resonant inverter, 4) High voltage transformer and
rectifier circuits, and 5) Control and monitoring circuits.
The following is a brief description of each building
block.

4.1 Power Factor and Associated
Circuits

The SLM series can operate from 90 - 265Vac, for the
300Watt model and 180 –264Vac for the 600 and
1200Watt models. The input voltage is connected via a
typical IEC 320 type input connector. An internal EMI
filter and fuse housing is an integral part of the SLM
module. The input circuits actively correct the power
factor.

The input line voltage is applied to a current limit device
to reduce the initial inrush current. The input line voltage
is converted to a 400Vdc voltage via an active PFC
Converter.

WARNING

The energy levels used and generated by the

power supply can be lethal! Do not attempt to

operate the power supply unless the user has a

sufficient knowledge of the dangers and hazards

of working with high voltage. Do not attempt to

approach or touch any internal or external

circuits or components that are connected or

have been connected to the power supply. Be

certain to discharge any stored energy that may

be present before and after the power supply is

used. Consult IEEE recommended practices for

safety in high voltage testing #510-1983.

4.2 High Frequency Inverter

The SLM is a resonant converter operating in a zero
current switching, series resonant, parallel loaded
topology. MOSFET transistors switch the 400 Vdc
voltage to the resonant tank circuit. Typical operating
frequency is in the range of 35-65 KHz depending on
model. Control of the resonant circuit output is done by
the low voltage control circuits, and are isolated by an
isolated pulse transformer. The output of the resonant
circuit is applied to the primary of the high voltage
transformer.

4.3 High Voltage Circuits

The high voltage transformer is a step-up type. The
secondary of the high voltage transformer is connected to
the high voltage output circuit. The output circuit will
vary depending upon the rated output voltage and a full
wave Cockroft-Walton multiplier is used. A feedback
signal is generated by the high voltage resistor divider.
This feedback signal is sent to control circuits to provide
voltage regulation and monitoring. A current sense
resistor is connected at the low voltage end of the output
circuit. The circuit sense signal is sent to the control
circuits to provide current regulation and monitoring.

The high voltage output is connected to the output
limiting resistors. These resistors limit the peak surge
current in the event an arc or discharge occurs. The
limiting resistor output is connected to the output
connector provided.

WARNING

THE HVPS IS DESIGNED TO HANDLE AN

ARC RATE OF 1 ARC PER SECOND,

EXCEEDING 1 ARC PER SECOND COULD

CAUSE DAMAGE TO THE HVPS. HVPS

FAILURE CAUSED BY EXCESSIVE ARC

WILL NOT BE COVERED UNDER THE

WARRANTY.

SLM MANUAL 13 118073-001 Rev C

4.4 Control Circuits

Control circuits are used for regulation, monitoring,
pulse-width, control, slow-start and inhibit control.
Feedback signals are calibrated and buffered via general
purpose OP-AMPS. Pulse width control is accomplished
by a typical PWM type control I.C. Logic enable/disable
is provided by a logic gate I.C. Regulators generate ±
15Vdc and 10Vdc. DSP based control circuitry provides
excellent regulation, along with outstanding stability
performance

WARNING

LINE VOLTAGE IS PRESENT

WHENEVER THE POWER SUPPLY IS

CONNECTED TO EXTERNAL LINE
VOLTAGES. BE SURE TO DISCONNECT
THE LINE CORD BEFORE OPENING THE

UNIT. ALLOW 5 MINUTES FOR

INTERNAL CAPACITANCE TO

DISCHARGE BEFORE REMOVING ANY

COVER.

4.5 Options

Due to the variations of models and options provided in
the SLM series, details of actual circuits used may differ
slightly from above descriptions. Consult Spellman’s
Engineering Department for questions regarding the
principles of operations for the SLM series.

SLM MANUAL 14 118073-001 Rev C

Chapter 5

5.1 Custom Designed Models X (#)

Units built to customer specifications are assigned an X
number be the factory. If this unit is an X model,
specification control sheet is added at the end of this
instruction manual.

SLM MANUAL 15 118073-001 Rev C

Chapter 6

MAINTENANCE

his section describes periodic servicing and
performance testing procedures.

T

WARNING

THIS POWER SUPPLY GENERATES VOLTAGES

THAT ARE DANGEROUS AND MAY BE FATAL.

OBSERVE EXTREME CAUTION WHEN

WORKING WITH HIGH VOLTAGE.

6.1 Periodic Servicing

Approximately once a year (more often in high dust
environments), disconnect the power to the unit. Use
compressed air to blow dust out of the inside of the unit.
Avoid touching or handling the high voltage assembly.

6.2 Performance Test

WARNING

High voltage test procedures are described in Bulletin
STP-783, Standard Test Procedures for High Voltage
Power Supplies. Copies can be obtained from the
Spellman Customer Service Department. Test equipment,
including an oscilloscope, a high impedance voltmeter,
and a high voltage divider such as the Spellman HVD­100 is needed for performance tests. All test components
must be rated for operating voltage.

6.3 High Voltage Dividers

High voltage dividers for precise measurements of output
voltage with an accuracy up to 0.1% are available from
Spellman. The HVD-100 is used for voltages up to
100KV. The Spellman divider is designed for use with
differential voltmeters or high impedance digital
voltmeters. The high input impedance is ideal for
measuring high voltage low current sources, which would
be overloaded by traditional lower impedance dividers.

HIGH VOLTAGE IS DANGEROUS.

ONLY QUALIFIED PERSONNEL SHOULD

PERFORM THESE TESTS.

SLM MANUAL 16 118073-001 Rev C

Chapter 7

FACTORY SERVICE

7.1 Warranty Repairs

During the Warranty period, Spellman will repair all units
free of charge. The Warranty is void if the unit is worked
on by other than Spellman personnel. See the Warranty
in the rear of this manual for more information. Follow
the return procedures described in Section 7.2. The
customer shall pay for shipping to and from Spellman.

THE SLM HVPS IS DESIGNED TO HANDLE AN
ARC RATE OF 1 ARC PER SECOND. EXCEEDING
1 ARC PER SECOND COULD CAUSE DAMAGE
TO THE HVPS. HVPS FAILURE CAUSED BY
EXCESSIVE ARC WILL NOT BE COVERED

UNDER THE WARRANTY

7.2 Factory Service Procedures

Spellman has a well-equipped factory repair department.
If a unit is returned to the factory for calibration or repair,
a detailed description of the specific problem should be
attached.

For all units returned for repair, please obtain an
authorization to ship from the Customer Service
Department, either by phone or mail prior to shipping.
When you call, please state the model and serial numbers,
which are on the plate on the rear of the power supply,
and the purchase order number for the repair. A Return
Material Authorization Code Number (RMA Number) is
needed for all returns. This RMA Number should be
marked clearly on the outside of the shipping container.
Packages received without an RMA Number will be
returned to the customer. The Customer shall pay for
shipping to and from Spellman.

.

A preliminary estimate for repairs will be given by phone
by Customer Service. A purchase order for this amount is
requested upon issuance of the RMA Number. A more
detailed estimate will be made when the power supply is
received at the Spellman Repair Center. In the event that
repair work is extensive, Spellman will call to seek
additional authorization from your company before
completing the repairs.

7.3 Ordering Options and
Modifications

Many of the options listed in Chapter 5 can be retrofitted
into Spellman power supplies by our factory. For prices
and arrangements, contact our Sales Department.

7.4 Shipping Instructions

All power supplies returned to Spellman must be sent
shipping prepaid. Pack the units carefully and securely in
a suitable container, preferably in the original container, if
available. The power supply should be surrounded by at
least four inches of shock absorbing material. Please
return all associated materials, i.e. high voltage output
cables, interconnection cables, etc., so that we can
examine and test the entire system.

All correspondence and phone calls should be directed to:

Spellman High Voltage Electronics Corp.

475 Wireless Boulevard
Hauppauge, New York 11788
TEL: [phone] FAX: [phone]
E-Mail: [e-mail]
http://www.spellmanhv.com

SLM MANUAL 17 118073-001 REV C

SPELLMAN HIGH VOLTAGE ELECTRONICS

WARRANTY

Spellman High Voltage Electronics (“Spellman”) warrants that all power supplies it manufactures will be

free from defects in materials and factory workmanship, and agrees to repair or replace, without charge, any
power supply that under normal use, operating conditions and maintenance reveals during the warranty
period a defect in materials or factory workmanship. The warranty period is twelve (12) months from the
date of shipment of the power supply. With respect to standard SL power supplies (not customized) the
warranty period is thirty-six (36) months from the date of shipment of the power supply.

This warranty does not apply to any power supply that has been:

• Disassembled, altered, tampered, repaired or worked on by persons unauthorized by Spellman;

• subjected to misuse, negligent handling, or accident not caused by the power supply;

• installed, connected, adjusted, or used other than in accordance with the original intended application and/or

instructions furnished by Spellman.

THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
THOSE OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

The buyer’s sole remedy for a claimed breach of this warranty, and Spellman’s sole liability is limited, at

Spellman’s discretion, to a refund of the purchase price or the repair or replacement of the power supply at
Spellman’s cost. The buyer will be responsible for shipping charges to and from Spellman’s plant. The

buyer will not be entitled to make claim for, or recover, any anticipatory profits, or incidental, special or
consequential damages resulting from, or in any way relating to, an alleged breach of this warra nty.

No modification, amendment, supplement, addition, or other variation of this warranty will be binding unless
it is set forth in a written instrument signed by an authorized officer of Spellman.

For an authorization to ship contact Spellman’s Customer Service Department. Please state the model and
serial numbers, which are on the plate on the rear panel of the power supply and the reason for return. A
Return Material Authorization Code Number (RMA number) is needed from Spellman for all returns. The
RMA number should be marked clearly on the outside of the shipping container. Packages received without
an RMA Number may delay return of the product. The buyer shall pay shipping costs to and from Spellman.
Customer Service will provide the Standard Cost for out-of-warranty repairs. A purchase order for this
amount is requested upon issuance of the RMA Number (in-warranty returns must also be accompanied by
a “zero-value” purchase order). A more detailed estimate may be made when the power supply is received
at Spellman. In the event that the cost of the actual repair exceeds the estimate, Spellman will contact the
customer to authorize the repair.

Spellman will warrant for three (3) months or balance of product warranty, whichever is longer, the repaired
assembly/part/unit. If the same problem shall occur within this warranty period Spellman shall undertake all
the work to rectify the problem with no charge and/or cost to the buyer. Should the cause of the problem be
proven to have a source different from the one that has caused the previous problem and/or negligence of
the buyer, Spellman will be entitled to be paid for the repair.

For a complete listing of Spellman’s Global Service facilities please go to:
http://www.spellmanhv.com/customerservice/service.asp

Factory Service Procedures

Factory Service Warranty

Spellman Worldwide Service Centers

101520-007 REV D

SLM Digital Interface

Manual

Ethernet

Serial – RS-232

Universal Serial Bus - USB

Copyright © 2007, Spellman High Voltage Electronics Corporation. All Rights Reserved.

This information contained in this publication is derived in part from proprietary and patent data. This information has

been prepared for the express purpose of assisting operating and maintenance personnel in the efficient use of the

model described herein, and publication of this information does not convey any right to reproduce it or to use it for

any purpose other than in connection with installation, operation, and maintenance of the equipment described.

475 Wireless Boulevard • Hauppauge, New York 11788, USA • www.spellmanhv.com • T:+1 631.630.3000 • F:+1 631.435.1620

118080-001 REV A

Table Of Contents

1.0 Scope .......................................................................................................................3

2.0 Functional Description ...........................................................................................3

3.0 Getting Started - Interface Wiring and Pin-outs ...................................................3

3.1 RS232 Interface .................................................................................................................... 3

3.2 Ethernet Interface.................................................................................................................. 5

3.3 Universal Serial Bus Interface..............................................................................................6

3.4 RS-232 Cabling..................................................................................................................... 6

3.5 Ethernet Cabling ................................................................................................................... 6

3.6 USB Cabling......................................................................................................................... 8

4.0 Getting Started - Software....................................................................................10

4.1 RS-232 ................................................................................................................................ 10

4.2 Ethernet............................................................................................................................... 12

4.3 USB..................................................................................................................................... 29

5.0 Ethernet Commands............................................................................................. 37

5.1 TCP/IP Format.................................................................................................................... 37

5.2 Command Arguments......................................................................................................... 38

5.3 Command Overview........................................................................................................... 38

5.4 Response Overview ............................................................................................................ 40

5.5 Command Structure............................................................................................................ 41

6.0 Serial Commands – RS-232 / USB .......................................................................67

6.1 Serial Interface Protocol ..................................................................................................... 67

6.2 Command Arguments......................................................................................................... 67

6.3 Checksums.......................................................................................................................... 67

6.4 Command Overview........................................................................................................... 69

6.5 Response Overview ............................................................................................................ 70

6.6 Command Structure............................................................................................................ 72

6.7 Spellman Test Commands .................................................................................................. 95

6.8 Serial Command Handling.................................................................................................. 95

118080-001 REV A Page 2 of 95

WARNING

THIS EQUIPMENT GENERATES DANGEROUS VOLTAGES THAT MAY BE FATAL.

PROPER GROUNDING OF ALL HIGH VOLTAGE EQUIPMENT IS ESSENTIAL.SEE SLM

OWNERS MANUAL FOR PROPER GROUNDING TECHNIQUE AND SAFETY

PRECAUTIONS BEFORE APPLING AC INPUT POWER TO THE SLM UNIT.

TO PREVENT DAMAGE TO THE HOST COMPUTER ,THE COMPUTER SHOULD BE

GROUNDED TO THE UNIT.

1.0 SCOPE

This document applies to the communications interfaces on the SLM, assembly

460067.

2.0 FUNCTIONAL DESCRIPTION

The SLM provides 3 different types of digital communications interfaces:

• RS-232 on J3

• Ethernet (10/100-Base-T) on J5

• Universal Serial Bus on J4.

3.0 GETTING STARTED - INTERFACE WIRING AND PIN-OUTS

3.1 RS232 INTERFACE

The RS232C interface has the following attributes:

• 115K bits per second

• No Parity

• 8 Data Bits

• 1 Stop Bit

• No handshaking

• DB-9 connector as shown

118080-001 REV A Page 3 of 95

Figure 1 – J3, RS-232 DB-9M pinout (front view)

PIN DESCRIPTION

1 ­2 Tx Out
3 Rx In
4 ­5 Ground
6 ­7 ­8 ­9 -

118080-001 REV A Page 4 of 95

3.2 ETHERNET INTERFACE

The Ethernet interface has the following attributes:

• 10/100-Base-T

• IP address can be set by the system integrator

• Network Mask can be set by the system integrator

• TCP Port Number can be set by the system integrator

• RJ-45 connector

• Network attachment via Crossover and Standard Ethernet cables.

• Supported Operating Systems: Windows 98 2ED, Windows 2000

(SP2), Windows NT (SP6), Windows XP Professional

Figure 2 – J5, Ethernet RJ45 Jack (front view)

PIN DESCRIPTION

1 TX+
2 TX­3 RX+
4 ­5 ­6 RX­7 ­8 -

The Ethernet RJ-45 has two LED indicators, as shown in Figure 2. The left
LED, LED1 indicates that the network processor has a valid network link.
The right LED, LED2 indicates network activity.

LED 2 LED 1

8 7 6 5 4 3 2 1

118080-001 REV A Page 5 of 95

3.3 USB – UNIVERSAL SERIAL BUS INTERFACE

The USB interface has the following attributes:

• Compliant with USB 1.1 and USB 2.0 specifications

• Type B male connector

• Included driver can be communicated with via standard Windows

serial communications methods

Figure 3 – J4, USB Type B (front view)

PIN DESCRIPTION

1 Vbus +5V
2 D­3 D+
4 Ground

3.4 RS-232 CABLING

A standard shielded RS-232 cable is used to connect the SLM serial port
to the serial port on a standard personal computer. Please refer to the
following chart.

PC Connector (DB-9 Female) SLM Connector (DB-9 Male)
Pin 2: RX In Pin 2: TX Out

Pin 3: TX Out Pin 3: RX In
Pin 5: Ground Pin 5: Ground

PC to SLM Board Cable Details

3.5 ETHERNET CABLING

Shielded Category 5 (CAT5) Ethernet patch cables are used to connect
the SLM to the host computer. There are two ways to connect to the SLM
board via Ethernet: the first is to directly cable between the host and the
SLM board, and the second is through the use of a switch, hub, or
network.

118080-001 REV A Page 6 of 95

A direct connection requires a non-standard cable where the wires are not
run straight through. Please refer to the two cable ends shown below in
figure 4.

Figure 4 – Crossover Cable for Direct Connection

A standard connection through a hub, switch, or network uses a standard
CAT5 patch cable. Please refer to the two cable ends shown below in
figure 5.

Figure 5 – Standard Straight Through Cable – Standard CAT5 Patch

118080-001 REV A Page 7 of 95

3.6 USB CABLING

A high-quality double-shielded USB 2.0 Type A to B (host to slave) cable
should be used in all applications. This type of cable is a standard PC to
peripheral cable that utilizes full-size connectors.

Figure 6 – USB A-to-B cable

3.6.1 HIGH EMI ENVIRONMENTS

If the SLM USB interface is being used in a high-EMI environment, ferrites
should be added to the USB cable. Figure 7 illustrates the possible
combinations of ferrites that can be used to achieve acceptable operation
under these conditions.

POW ER SUPPLY

WITH

USB

FERRITE

CORE

(cable)

24 V DC

Figure 7 – Block Diagram of USB Cable Utilizing Ferrites

FERRITE

BEAD

(ca ble )

FERRITE

CORE

(cable)

FERRITE

CORE

(cable)

USB CABLE

FERRITE

BEAD

(cable)

PC

WITH

USB

118080-001 REV A Page 8 of 95

Ferrite beads should be attached to the USB cable next to the connectors
– both sides should be installed. In extreme cases ferrite cores may be
added where the cable is looped 3 or 4 times around the core as shown in
figure 8. Cores of 1.5 to 2 inches should be used at both ends of the
cable.

Figure 8 - Example of a USB Cable Using Ferrites

Please refer to the USB Interface Setup section, for an explanation of how
USB works and why EMI may present a problem for this communications
interface.

118080-001 REV A Page 9 of 95

4.0 GETTING STARTED – SOFTWARE

The following sections detail how to create software to interface to the SLM
communications interfaces.

4.1 RS-232

The RS-232 interface makes use of a standard ‘command/response’
communications protocol. See section 6.0 for the syntax of the serial
interface protocol. The programmer should also review section 4.3 for
programming considerations for the USB interface as the code is nearly
identical for the RS-232 interface.

All software that addresses the RS-232 interface must adhere to the
following parameters:

• A default Baud rate of 115.2K bps

• No Parity

• 8 Data Bits

• 1 Stop Bit

• No handshaking

The Baud rate can be changed to 115.2K ,57.6k,38.4k,19.2k or 9600 bps
and stored in the unit.

4.1.1 Enabling Communications Objects in Visual Basic for RS-232

Communications in Microsoft Visual Basic 6.0 are directed to a control
that abstracts the port. In the case of serial and USB we need
Microsoft Comm Control 6.0. To enable this in your VB 6 project, go to:

Project -> Components

Then in the list make sure that Microsoft Comm Control 6.0 has a
check next to it. The Comm Control Object should then appear in your
toolbox. It will have an icon of a telephone and will be named:
MSComm. This can be dragged and dropped into your application.
You will then need to set the object’s properties.

4.1.2 Configuring Communications in Visual Basic for RS-232

In order to configure the MSComm Object, first you must initialize it
in the Object properties:

Settings 115200,n,8,1
Handshaking 0 – comNone

The application can be set to either default to a specific COM Port
or the End User can be allowed to choose one for the particular PC.

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For the “Default” scenario, include the following commands in the
Form_Load() routine:

MSComm1.CommPort = portNumber

MSComm1.PortOpen = True

For the “Choice” scenario, place the above two commands in a
selectable menu item.

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4.2 ETHERNET

The SLM contains an embedded diagnostic web server that can be
accessed through any standard web browser by browsing to the SLM’s IP
address. For example:

http://192.168.1.4

The Ethernet interface communicates using the following protocols:

• TCP/IP

• HTTP

• TFTP

• FTP

4.2.1 Diagnostic Web Server

The diagnostic web server can control and monitor an SLM equipped
power supply from a web browser. It displays operating status of the
Power Supply and allows the unit to be configured in real time. The
application consists of three web pages; a page displaying contact
information, a license agreement, and a monitoring and control applet that
is at the heart of this application. The Web Server application for the SLM
is presented as an example in the following pages.

4.2.2 Web Pages

4.2.2.1 Web Page 1: Contact Information Page

Figure 9 displays a picture of the SLM and information on how to
contact Spellman High Voltage Electronics Corporation. By clicking
on the picture of the SLM or on the button labeled “Click Here to
Monitor and Control” one can move on to the next screen, the
license agreement.

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Figure 9 - Web Page 1- Contact Information

118080-001 REV A Page 13 of 95

4.2.2.2 Web Page 2: License Agreement Page

Figure 10 displays the license agreement. Here the user can either
agree or disagree with the Spellman license agreement. Click on “I
Accept” to continue on to the applet.

Figure 10 - Web Page 2 – License Agreement

118080-001 REV A Page 14 of 95

4.2.2.3 Web Page 3 - Monitor and Control Applet

4.2.2.3.1 Requirements

The Monitor and Control Applet is a java “applet” (“small java
application” specifically written to be embedded in a web
page and invoked from a browser) that requires an Internet
browser with an installed JVM (Java Virtual Machine). The
password for the applet is: shvapplet. We have tested
under Internet Explorer 5 and 6, Microsoft JVM 5 and Sun
JVM versions 1.6 and higher.

4.2.2.3.2 Description of Monitor and Control Applet

Figure 11 displays an example of an embedded monitor and
control application.

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Figure 11 - Control and Monitor Applet

View the screen as a “left” and a “right” with the right half
containing status read from the SLM and the left half
containing the values that are programmable by the user.
For any programmable setting you click on the button to the
left of the setting, which brings up the program set point
screen. For example, click on the button labeled, ‘V’ to set
the output voltage set point. Refer to figure 12.

4.2.2.4 Program Set Point Screen

.

Figure 12 - Program Configurable Values Screen

The field is the scaled value or real world value. Enter the desired
set point level within the shown range.

The user can then click Apply to send the set point to the SLM and
remain in the set point screen, or click OK to send the set point and
close the set point entry window. The user may also click on
Cancel to close the window without sending any changes.

To reset the Total hour On meter to zero via the Applet a password
is required.The password is “SHV_Reset”

4.2.2.5 Java Warning Messages

You may notice a message at the bottom of all dialog windows that
are displayed from the SLM Control and Monitor Applet. The
wording may vary slightly depending on the JVM version but on
some the message is “Java Applet Window”. This message informs
the user that the dialog window was generated by an applet. The
design philosophy for the JVM was for secure computing, so the
origins of new windows are supposed to be as obvious as possible.

118080-001 REV A Page 16 of 95

4.2.2.6 “Tabs” on Applet

The user can view and set operating parameters of the applet or
network configurations of the SLM or view firmware version
information by changing tabs.

4.2.2.7 User Settings

The User Settings tab allows the user to set firmware configurable
options, as shown above. After making changes to the options,
click on the “Click to Apply Changes” button.

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Figure 13 – User Setting

4.2.2.8 Fault log

118080-001 REV A Page 18 of 95

Figure 14 – Fault log

Fault log displays faults with their date and time.

4.2.2.9 About

Displays version information and model number.

118080-001 REV A Page 19 of 95

Figure 15 – About

4.2.2.10 Turning the SLM HVOn/Off and Connection Status

Please refer to Figure 11, the Monitor and Control Applet.

Setting Name Range Values

Local/Remote Local mode/Remote mode
HV On/Off
Interlock Open/Closed
Fault Status OK/Fault
Connection Status Connected/No Data Received/Disconnected
Unlike the controls we previously discussed at the top of the screen

which required a separate dialog screen to enter values, these are
controlled by a button. For example, an On/Off button controls the
HV. When HV is on, the Control is labeled “Click to Turn HV Off”.
When HV is off, the control is labeled “Click to Turn HV On”.
Thereby handling the two distinct states.

Notice that at the very bottom of the screen is a text field that
displays the current connection status, which as mentioned above
is one of three values. “Connected” is displayed when there exists a
valid TCP/IP session connecting the SLM and the Applet and data
is being received by the applet from the SLM. The next state is “No
Data Received” which is when there is still a valid connection but no
responses have been received from the SLM for 2 seconds. Lastly,
the text field displays “Disconnected” when the TCP/IP session has
been disconnected. To operate the UUT using the Computer
interface the UUT must be set to Remote Mode by Clicking “Click to
Set Remote, the SLM Applet automatically sets the unit to Remote
mode upon connecting.

When the Applet is first started and anytime the “Click To Connect”
button is clicked there is a 5 second delay as the Applet starts up
the threads necessary for communication between it and the SLM.

4.2.3 Direct Connection between the SLM and a Computer

A direct Ethernet connection between the SLM and the computer
requires an RJ45 crossover cable. The end connectors will look
identical to a “normal” RJ45 connector but the colors of some of the
wires in the connectors will be “reversed”. Hold up the two ends of
the RJ45 cable and look at the color of the wires from left to right.
They should differ on the two connectors.

118080-001 REV A Page 20 of 95

When direct connecting the SLM to a computer using a crossover
cable over Ethernet they are essentially participating in a private
network. As such you need to pick two valid IP addresses, one for
each device.

The table below illustrates that not all IP addresses are actually
valid IP addresses. For example, IP addresses beginning with 127
are not valid.

Class Address Range

A 1.0.0.0-126.255.255.255
B 128.0.0.0-191.255.255.255
C 192.0.0.0-223.255.255.255

4.2.3.1 Configuring the Computer for Direct Ethernet
Connection

As mentioned above both the IP Address and Subnet Mask need to
be configured. In our environment computers normally are assigned
IP addresses dynamically, using DHCP. We need to change this
and assign the IP Address statically to the one we have selected.

Here are the steps on Windows XP. On the desktop right click on
“My Network Places” and select properties at the bottom of the
menu.

118080-001 REV A Page 21 of 95

Figure 16 – Right Click on Desktop

Figure 17 – Select Properties

After selecting properties you are brought up to the screen below
(Figure 18). You must RIGHT CLICK and select Properties on
Local Area Connection, and not double click which will display a
window similar to figure 19.

Figure 18 – Here you must Right Click and Select Properties

118080-001 REV A Page 22 of 95

Figure 19 – Local Area Connection Properties

Now you must select “Internet Protocol (TCP/IP)” and click on the
Properties button to be brought to figure 20. Lastly you must
disable any firewall software you have running. If you are running a
proxy server for Internet access, you must also disable the proxy
client. Disabling this also requires a reboot.

118080-001 REV A Page 23 of 95

Figure 20 – TCP/IP Properties

4.2.3.2 Testing a Direct Connection

You can use the program “Ping” to test a network connection
between the computer and the SLM. “Ping” is a command line tool
so we will need to bring up a command prompt. Under Windows
NT, 2000 and XP the name of this command is “CMD”. Under
Windows 98 the name of this command is “Command”.

To do this, click on Start->Run->Cmd
Then on the command line type
Ping <IP Address>
For example
Ping 192.168.1.4

If the SLM is found at the specified IP address, the Ping command
will respond with a report that is similar to:

Pinging 192.168.1.4 with 32 bytes of data:

118080-001 REV A Page 24 of 95

Reply from 192.168.1.4: bytes=32 time<1ms TTL=64
Reply from 192.168.1.4: bytes=32 time<1ms TTL=64
Reply from 192.168.1.4: bytes=32 time<1ms TTL=64
Reply from 192.168.1.4: bytes=32 time<1ms TTL=64
Ping statistics for 192.168.1.4:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

4.2.4 Configuring the SLM For a Local Area Network (LAN)

If you have chosen to place the SLM onto your local area network
you will need:

• A CAT5 network patch cable to physically connect the SLM
to the LAN

• A static IP address to assign to the SLM.

Remember that even if the IP address you have selected is in
general a valid IP address it needs to be valid for your LAN (local
area network). Otherwise the device will not be accessible from an
Internet browser or Ping.

4.2.4.1 Configuring the Network Settings from the
Monitor and Configure Applet

The network settings are configurable from the Network Settings
tab, refer to figure 21.

118080-001 REV A Page 25 of 95

The settings that can be changed are the:

Once the Apply button is clicked on the network settings screen,
the network component of the SLM is configured, rebooted and the
applet is disconnected from the SLM. You must type the NEW IP
address into a web browser to bring up a new instance of the applet
to monitor and control the SLM after reconfiguring it. This may also

118080-001 REV A Page 26 of 95

Figure 21 - Configure Network Settings

• Device Name

• IP Address

• TCP Port

• Subnet Mask

require reconfiguring the host computer with the correct host IP
address, subnet mask, and TCP port.

The device name does not affect the operation of the SLM; it is
simply a way for the user to differentiate multiple units on the same
network.

Depending on the type of network you are attaching the SLM to,
you may need to configure the host PC’s IP address and subnet
mask as shown in section 4.2.3.1. You can also test a network
connection to the SLM by following the instructions listed in section

4.2.3.2 .

4.2.5 Enabling Communications Objects in Visual Basic for Ethernet
Communications

For Ethernet communications, we need Microsoft Winsock Control 6.0 and
SP5. To enable this in your VB 6 project, go to:

Project -> Components

Once selected in your toolbox, you will have an icon of two computers
linked together and will be named: Winsock. This can be dragged and
dropped into your application. Then set the object’s properties.

4.2.6 Configuring Communications in Visual Basic for Ethernet

In order to configure the Winsock Object, you must make the following
initialization in the object’s properties:

Protocol 0 – sckTCPProtocol
Then, in the application code, include the following commands:

tcpClient.RemoteHost = host

tcpClient.RemotePort = portNumber
tcpClient.Connect

For further information regarding the use of the above commands, please
refer to your Visual Studio Help File.

4.2.6.1 Data Output Example

MSComm1 is both the serial and USB port. TcpClient is the
Ethernet port.

118080-001 REV A Page 27 of 95

If (portType = "ethernet") Then
tcpClient.SendData (str)
Else
MSComm1.InBufferCount = 0
On Error GoTo done
MSComm1.Output = str

done:

tmrOpenClose.Enabled = True

End If

4.2.6.2 Data Input Example

If (portType = "ethernet") Then
Do
DoEvents

.............................................................................................................................

..................................................................................................ttcpClient.GetData temp$

str = str + temp$
Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1
On Error Resume Next
Else
Do
DoEvents
If MSComm1.InBufferCount > 0 Then
str = str & MSComm1.Input
End If
Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1
If InStr(str, Chr(3)) > 0 Then
tmrOpenClose.Enabled = False

End If

End If

118080-001 REV A Page 28 of 95

4.3 USB

The USB interface makes use of a standard ‘command/response’
communications protocol. See section 6.0 for the syntax of the serial
interface protocol.

The USB interface is accessed through a Windows USB Human Interface
driver (HID).

4.3.1 USB Driver Installation

The HID driver is a Windows driver installed with the operating system. To
determine if the driver had been acquired open the System properties
window selecting the Control Panel System Properties.

Then select Device Manager and expand the Human Interface Devices.
View the properties of the USB Human Interface Device icon and verify
that Spellman USB HID appears in the Location section.

118080-001 REV A Page 29 of 95

Figure 22 – System Properties

Figure 23 – Device Manager showing USB HID

4.3.2 USB and EMI

The USB protocol utilizes a heartbeat signal from each client device back
to the host (PC). If the heartbeat is interrupted due to radiated or
conducted transient noise, it is possible that the host may lose connection
with the client. This can cause problems with data transfers over the USB
cable.

The DXM when used in combination with the HID Windows driver makes it
possible for the host to renumerate the client connection and reestablish
communications. This is providing the control application implements a
method of timeout and retry.

NOTE: If an EMI disruption occurrs the DXM will continue to renumerate
until a connection with the GUI is re-established.

118080-001 REV A Page 30 of 95

4.3.3 Enabling Communications Objects in Visual Basic for USB

The dynamic link library USB_dll.dll will be provided which needs to be
added to the project. The library has three functions that can be called
from the VB code.

The three functions are:

• FindTheHid – finds the connection with the correct VID, PID and Serial
Number

• WriteReport(str) – Writes a string to the connected HID interface

• ReadReport() – Returns a string from the connected HID interface

4.3.4 Configuring Communications in Visual Basic for USB

To use the USB_dll.dll in VB the following statements are needed.

Dim usb As usbDll
Dim MyDeviceDetected As Boolean

Set usb = New usbDll

Using this statement determines whether a connection is present.

MyDeviceDetected = usb.FindTheHid

If MyDeviceDetected is true then the connection is present.

4.3.5 Software Considerations for USB Reconnection

The following Visual Basic code snippets are presented as a guideline for
implementation with revision C and higher assemblies.

4.3.5.1 Recognize partial, corrupt, or absent data

1: temp2$ = inputInputString
2: If temp2$ <> "" Then
3: btn_UPDATEDATA.Value = False
4: CommStatusFlag = True
5: CommaPos = InStr(Start, temp2$, Comma, vbTextCompare)
6: ' Channel 0
7: On Error GoTo endhere
8: AmbTemp = Mid(temp2$, Start, (CommaPos - Start))

Please note that even though we have guarded against no data, in
line 2, we still need to guard against bad data, in this case no
comma, on line 8. If there is no comma, we wind up passing a
negative value to Mid, which is an error, that we should trap for.

118080-001 REV A Page 31 of 95

4.3.5.2 Retrieve data only if it exists

1: Do
2: DoEvents
3: If MSComm1.InBufferCount > 0 Then
4: str = str & MSComm1.Input
5: End If
6: Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1
7: 'str = str & MSComm1.Input
8: If InStr(str, Chr(3)) > 0 Then
9: tmrOpenClose.Enabled = False
10: End If

Notice that in line 3 we check for the existence of data before we
extract data from the USB port. Normally, if there is no data, line 4
would append an empty string. However, during a noise event,
retrieving data without first checking the existence of data could
hang.

4.3.5.3 Example Output Routine

Notice that on line 13 we register an error handler in case the port
is invalid because we have closed it in another routine. Notice that
on line 16 we start a timer. When we output data on the port we
start a timer to keep track of incoming data. If we get no incoming
data it means that communications have been interrupted.

1: Private Sub outputOutputString(outputString As String)
2: Dim str As String
3: str = ProcessOutputString(outputString)
4: StatusBar1.Panels(4).Text = "TX: " & str
5: 'StatusBar1.Panels(3).Text = "RX: Waiting"
6: If (portType = "ethernet") Then
7: tcpClient.SendData (str)
8: ElseIf (portType = "USB") Then
9: usb.WriteReport (str)
10: Else
11: MSComm1.InBufferCount = 0
12:
13: On Error GoTo done
14: MSComm1.Output = str
15: done:
16: tmrOpenClose.Enabled = True
17: End If
18: End Sub

118080-001 REV A Page 32 of 95

4.3.5.4 Example Input Routine

Notice on line 26 we check for data first before extracting data from
the input. Then if we have actual data we turn off the timer.
Otherwise the timer routine toggles the port open/close.

1: Private Function inputInputString() As String
2: Dim str As String
3: Dim t1 As Single
4: Dim temp$

5: Dim stra As String
6: Dim stri(300) As String

7: t1 = Timer
8:
9: If (portType = "ethernet") Then
10: Do
11: DoEvents
12: tcpClient.GetData temp$
13: str = str + temp$
14: Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1
15: On Error Resume Next

16: ElseIf (portType = "USB") Then
17: Do

18: DoEvents
19: stra = usb.ReadReport
20: str = str & stra
21: 'str = str & ReadReport
22: Loop Until InStr(str, Asc(3)) Or Timer - t1 > 0.09

23: Else

24: Do

25: DoEvents

26: If MSComm1.InBufferCount > 0 Then

27: str = str & MSComm1.Input

28: End If

29: Loop Until InStr(str, Chr(3)) Or Timer - t1 > 1

30:

31: If InStr(str, Chr(3)) > 0 Then

32: tmrOpenClose.Enabled = False

33: End If

34:

35: frm_EXTRAS.txt_MSCOMMBUFF.Text = str

36: tmr_COMMWDT.Enabled = True

37: On Error Resume Next

118080-001 REV A Page 33 of 95

38: End If

39: StatusBar1.Panels(3).Text = "RX: " & str

40: inputInputString = str

41: tmr_RCVTIMER.Enabled = True

42: End Function

4.3.5.5 Example Timer Routine: Toggle Port State

This is the timer routine in which the open/closed state of the port is

toggled. If communications are interrupted, the USB device will re-

register itself with the OS (vendor term: renumeration). Once this

happens, re-opening the port will enable communications. Until the

re-registration happens, open operations will fail. Notice line 5

where we register an error handler.

1:Private Sub tmrOpenClose_Timer()

2: If MSComm1.PortOpen = True Then

3:

4: MSComm1.PortOpen = False

5: On Error GoTo done

6: MSComm1.PortOpen = True

7: done:

8: tmrOpenClose.Enabled = False

9: End If

10:

11: End Sub

4.3.5.6 Example Timer Routine: Port Reconnection

This is another timer routine whose purpose is to turn the port on if

it is off. Notice that in line 8 an error handler is called because if the

device has not re-registered itself with the OS, an error will be

raised.

1: Private Sub tmr_COMMWDT_Timer()

2:

3: tmr_COMMWDT.Enabled = False

4:

5: If CommStatusFlag = True Then

6:

7: If MSComm1.PortOpen = False Then

8: On Error GoTo done

9: MSComm1.PortOpen = True

10: done:

11: End If

12:

13: ElseIf CommStatusFlag = False Then

14:

118080-001 REV A Page 34 of 95

15: If MSComm1.PortOpen = False Then

16:

17: MSComm1.PortOpen = True

18: Else

19: MSComm1.PortOpen = False

20: End If

21:

22: End If

4.3.5.7 Data Parsing Example

Here we have an example of a code that parses incoming data.

Notice that it makes use of our generic input and output routines.

The important consideration is to gracefully handle corrupted input

data after a noise event. In this case we may get data, so a test

against empty string returns false, but we may not get commas in

the correct place. Notice that we register an error handler on line 26

so that the mid function, which would raise an error when given a

negative number, is handled.

1: Private Sub btn_EMI_Click()

2: Dim temp2$

3: Dim Response1$

4: Dim Response2$

5: Dim number$

6: Dim Comma

7: Dim CommaPos

8: Dim Start

9: Dim ODATA$

10:

11: Comma = ","

12: Start = 5

13:

14: If tmr_RCVTIMER.Enabled = True Then

tmr_RCVTIMER.Enabled = False

15: If tmr_NETRCVTMR.Enabled = True Then

tmr_NETRCVTMR.Enabled = False

16:

17: If AutoUpdate = True Then

18: tmr_UPDATE.Enabled = False

19: End If

20:

21: number$ = "15,"

22: outputOutputString (number$)

23:

24: temp2$ = inputInputString

25: CommaPos = InStr(Start, temp2$, Comma, vbTextCompare)

118080-001 REV A Page 35 of 95

26: On Error GoTo endhere

27: Response1$ = Mid(temp2$, Start, (CommaPos - Start))

28:

29: 'With a 5v reference:

30: ODATA$ = Format(str(Response1$ * 0.0004884), "0.##0")

31:

32: txt_DACB.Text = ODATA$ + " mA"

33: frm_RAWDATA.txt_RAWDACB.Text = str(Response1$)

34: txt_DACB.BackColor = vbWhite

35: CommStatusFlag = True

36: endhere:

37:

38: If portType = "ethernet" Then

39: tmr_NETRCVTMR.Enabled = True

40: Else

41: tmr_RCVTIMER.Enabled = True

42: End If

43:

44: If AutoUpdate = True Then tmr_UPDATE.Enabled = True

46: End Sub

118080-001 REV A Page 36 of 95

5.0 ETHERNET COMMANDS

5.1 TCP/IP FORMAT

Each Ethernet command will consist of a TCP/IP header followed by the required
data bytes. Figure 27 summarizes the TCP/IP header configuration. Please note
that this functionality is provided by the software implementation of the Open
Systems Interconnection (OSI) TCP/IP protocol stack, specifically the upper 4
layers.

Byte

0 Protocol

Version

Header

Length

4 Packet ID Flags Fragmentation Offset

Type Of

Service

Total Length

8 Time To Live

Protocol Header checksum

12 Source Address

16 Destination Address

20 Source Port

Destination Port

24 Sequence Number

28 Acknowledgement Number

32 Data

Offset

36 Checksum

40 Data Byte 1

Reserved Code Bits

Data Byte 2 Data Byte 3 Data Byte N

Window

Urgent Pointer

Figure 24: Network TCP/IP datagram header

118080-001 REV A Page 37 of 95

The format of Data Bytes 1 through N are as follows:
<STX><CMD><,>ARG><,><ETX>
Where:

<STX> = 1 ASCII 0x02 Start of Text character
<CMD> = 2 ASCII characters representing the command ID
<,> = 1 ASCII 0x2C character
<ARG> = Command Argument
<,> = 1 ASCII 0x2C character
<ETX> = 1 ASCII 0x03 End of Text character

5.2 COMMAND ARGUMENTS

The format of the numbers is a variable length string. To represent the number
42, the string ‘42’, ‘042’, or ‘0042’ can be used. This being the case, commands
and responses that carry data are variable in length.

5.3 COMMAND OVERVIEW

Data Byte section of the TCP/IP Datagram
Command Name <CMD> <ARG> RANGE
Program RS-232

07 1 ASCII 1 - 5
unit baud rate
Program User
Configs

09 9 ASCII See

Description
Program kV 10 1-4 ASCII 0-4095
Program mA 11 1-4 ASCII 0-4095
Request kV

14 None ­Setpoint
Request mA

15 None ­Setpoint
Request Analog

19 None ­Monitor Readbacks
Request HV On

21 None ­Hours Counter
Request Status 22 None ­Request Software

23 None ­Version
Request Hardware

24 None ­Version
Request Web

25 None ­Server Version
Request Model

26 None ­Number

118080-001 REV A Page 38 of 95

Request User

27 None
Configs
Request unit

28 None
Scaling
Reset HV On

30 None ­Hours Counter
Reset Faults 31 None -

Request Network

50 None ­Settings
Program Network
Settings
Read Interlock

51 6 ASCII See

Description

55 1 ASCII 0 or 1
Status
Request kV

60 None ­monitor
Request mA

61 None ­monitor
Request –15V

65 None ­LVPS

Watchdog Tickle 88 None ­Watchdog enable 89 1 ASCII 0 or 1
Turn HV on/off 98 1 ASCII 0 or 1
Program

99 1 ASCII 0 or 1
Local/Remote
Mode

118080-001 REV A Page 39 of 95

5.4 RESPONSE OVERVIEW

The command responses will follow the same network TCP/IP header format as
outlined above in section 5.1. This list is comprised of Commands with complex
responses only. Commands using a simple response will use the <$> character
(ASCII 0x24) as a “Success” response or a single character error code. These
will be seven ASCII characters in length.

Response Name <CMD> Response
Request kV

Setpoint
Request mA
Setpoint
Request Analog
Monitor

14 7-10

ASCII

15 7-10

ASCII

19 11-22

ASCII
Readbacks
Request Total

21 13 ASCII
Hours High
Voltage On
Request Status 22 12 ASCII
Request DSP

23 17 ASCII
Software Version
Request Hardware

24 9 ASCII
Version
Request Web

25 17 ASCII
Server Version
Request Model

26 11 ASCII
number
Request User

27 8-16 ASCII
Configs
Request unit
Scaling
Request Network
Settings
Read Interlock

28 23-31

ASCII

50 48-104

ASCII

55 7 ASCII
Status
Request kV
monitor
Request mA
monitor
Request –15V
LVPS

60 7-10

ASCII

61 7-10

ASCII

65 7-10

ASCII

Request Faults 68 19 ASCII

118080-001 REV A Page 40 of 95

5.5 COMMAND STRUCTURE

5.5.1 Program kV

Description:
The host requests that the firmware change the setpoint of kV.

Direction:
Host to supply

Syntax:
<STX><10><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>10,4095,<ETX>

Response:
<STX><10><,><$><,><ETX>
<STX><10><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD, 1 = out of range

118080-001 REV A Page 41 of 95

5.5.2 Program mA

Description:
The host requests that the firmware change the setpoint of mA.

Direction:
Host to supply

Syntax:
<STX><11><,><ARG><,><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>11,4095,<ETX>

Response:
<STX><11><,><$><,><ETX>
<STX><11><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD, 1 = out of range

118080-001 REV A Page 42 of 95

5.5.3 Request Total Hours High Voltage On

Description:
The host requests that the firmware sends the present value of the Total
Hours High Voltage On.

Direction:
Host to supply

Syntax:
<STX><21><,><ETX>

Example:
<STX>21,<ETX>

Response:
<STX><21><,><ARG1>< ARG2>< ARG3><ARG4><ARG5>
<.><ARG6><,><ETX>

Where:

<.> = ASCII 0x2E

ARGx =0-9 in ASCII format
Example:

<STX>21,99999.9,<ETX>

118080-001 REV A Page 43 of 95

5.5.4 Request Status

Description:
The host requests that the firmware sends the power supply status.

Direction:
Host to supply

Syntax:
<STX><22><,><ETX>

Example:
<STX>22,<ETX>

Response:
<STX><22><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,><ARG5><,
><ARG6><,><ARG7><,><ARG8><,<ETX>

Where:
<ARG1> 1 = HvOn, 0 = HvOff
<ARG2> 1 = Interlock 1 Open, 0 = Interlock 1 Closed
<ARG3> 1 = Fault Condition, 0 = No Fault
<ARG4> 1 = Remote Mode, 0 = Local Mode
<ARG5> 1 = I Mode on, 0 = = I Mode off
<ARG6> 1 = ROV Enabled, 0 = ROV Disabled
<ARG7> 1 = AOL Enabled, 0 = AOL Disabled
<ARG8> 1 = Watchdog Enabled, 0 = Watchdog Disabled
Example:
<STX>22,1,1,0,0,0,0,0,0,<ETX>

118080-001 REV A Page 44 of 95

5.5.5 Request DSP Software Part Number/Version

Description:
The host requests that the firmware sends the DSP firmware version.

Direction:
Host to supply

Syntax:
<STX><23><,><ETX>

Example:
<STX>23,<STX>

Response:
<STX><23><,>< ARG><,><ETX>

Where:
<ARG> consists of eleven ASCII characters representing the current
firmware part number/version. The format is SWM9999-999

Example:
<STX>23,SWM9999-999,<ETX>

118080-001 REV A Page 45 of 95

5.5.6 Request Hardware Version

Description:
The host requests that the firmware sends the hardware version.

Direction:
Host to supply

Syntax:
<STX><24><,><ETX>

Example:
<STX>24,<ETX>

Response:
<STX><24><,>< ARG><,><ETX>

Where:
<ARG> consists of 3 ASCII characters representing the hardware version.
The format is ANN, where A is an alpha character and N is a numeric
character

Example:
<STX>24,A01,<ETX>

118080-001 REV A Page 46 of 95

5.5.7 Request Webserver Software Part Number/Version

Description:
The host requests that the firmware sends the Web Server firmware part
number/version.

Direction:
Host to supply

Syntax:
<STX><25><,><ETX>

Example:
<STX>25,<ETX>

Response:
<STX><25><,><ARG><,><ETX>

Where:
<ARG> consists of eleven ASCII characters representing the current
firmware part number/version. The format is SWM9999-999

Example:
<STX>25,SWM9999-999,<ETX>

118080-001 REV A Page 47 of 95

5.5.8 Request Model Number

Description:
The host requests that the firmware sends the unit model number

Direction:
Host to supply

Syntax:
<STX><26><,><ETX>

Example:
<STX>26,<ETX>

Response:
<STX><26><,><ARG><,><ETX>

Where:
<ARG> consists of five ASCII characters representing the model number.
The format is SLMNNANNN or XNNNN, where N is a numeric character
and where A is a letter character.

Example:
<STX>25,SLM70P600,<ETX> or <STX>25,X9999,<ETX>

118080-001 REV A Page 48 of 95

5.5.9 Reset Run Hours

Description:
The host requests that the firmware resets the run hour counter.

Direction:
Host to supply

Syntax:
<STX><30><,><ETX>

Example:
<STX>30,<ETX>

Response:
<STX><30><,><$><,><ETX>

118080-001 REV A Page 49 of 95

5.5.10 Reset Faults

Description:
The host requests that the firmware resets all Fault messages and
indicators.

Direction:
Host to supply

Syntax:
<STX><31><,><ETX>

Example:
<STX>31,<ETX>

Response:
<STX><31><,><$><,><ETX>

118080-001 REV A Page 50 of 95

5.5.11 Request Network Settings

Description:
The host requests that the firmware transmits the network settings

Application:

Function Device

ARG 1 ARG2 ARG3 ARG4 ARG5

Name

Remote

Address

Remote

Port

Subnet

Mask

MAC

Address

Direction:
Host to supply

Syntax:
<STX><50><,><ETX>

Example:
<STX>50,<ETX>

Response:
<STX><50><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,>
<ARG5><,><,><ETX>

Arguments:
Device Name is limited to 20 characters or less. Remote address is a ip
address in dotted notation. Remote port is a decimal number. Subnet
Mask and Default Gateway are also dotted notation and MAC address is
in MAC Address notation.

ARG1: Device Name 1 character minimum, up to 20 maximum
ARG2: IP Address <nnn><.><nnn><.><nnn><.><nnn>, where

<nnn> represents a number from 0 to 255.
ARG3: Remote Port 5001 or from 49152 to 65535.
ARG4: Subnet Mask <xxx><.><xxx><.><xxx><.><xxx>, where

<xxx> represents a number from 0 to 255.
ARG5: MACAddress <zzz><:><zzz><:><zzz><:><zzz><:><zzz>

<:><zzz> , where <zzz> represents a number

from 0 to 255.
Example:

<STX>50,Spellman2.0,32.78.110.37,1026,255.0.0.0,0:100:33:1:32:84,<E
TX>

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5.5.12 Program Network Settings

Description:
The host requests that the firmware programs the network settings and
then reboots.

Application:

Function Device

ARG 1 ARG2 ARG3 ARG4 ARG5

Name

Remote

Address

Remote

Port

Subnet

Mask

MAC

Address

Direction:
Host to supply

Syntax:
<STX><51><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,>
<ARG5><,><ARG6><,><ETX>

Arguments:
Device Name is limited to 20 characters or less. Remote address is a ip
address in dotted notation. Remote port is a decimal number. Subnet
Mask and Default Gateway are also dotted notation and MAC address is
in MAC Address notation.

ARG1: Device Name 1 character minimum, up to 20 maximum
ARG2: IP Address <nnn><.><nnn><.><nnn><.><nnn>, where

<nnn> represents a number from 0 to 255.
ARG3: Remote Port 5001 or from 49152 to 65535.
ARG4: Subnet Mask <xxx><.><xxx><.><xxx><.><xxx>, where

<xxx> represents a number from 0 to 255.
ARG5: MACAddress <zzz><:><zzz><:><zzz><:><zzz><:><zzz>

<:><zzz> , where <zzz> represents a number

from 0 to 255.
Example:

<STX>51,Spellman2.0,32.78.110.37,1026,255.0.0.0,0:100:33:1:32:84,<E
TX>

Response:
None, as Embedded server reboots with new settings.

118080-001 REV A Page 52 of 95

5.5.13 Read Interlock Status

Description:
The host requests that the firmware read the status of the interlock
channel.

Direction:
Host to supply

Syntax:
<STX><55><,><ETX>

Response:
<STX><55><,><ARG1><,><ETX>
Where ARG1 is Interlocks 1. A 1 indicates that the Interlock is energized

Example:
<STX>55,1,<ETX>

118080-001 REV A Page 53 of 95

5.5.14 Request kV Monitor

Description:
The host requests that the firmware report kV monitor.

Direction:
Host to supply

Syntax:
<STX><60><,><ETX>

Response:
<STX><60><,><ARG><,><ETX>

Where:
<ARG>=0-4095 in ASCII format representing unscaled value.

Example:
<STX>60,4095,<ETX>

118080-001 REV A Page 54 of 95

5.5.15 Request mA Monitor

Description:
The host requests that the firmware report mA monitor.

Direction:
Host to supply

Syntax:
<STX><61><,><ETX>

Response:
<STX><61><,><ARG><,><ETX>

Where:
<ARG>=0-4095 in ASCII format representing unscaled value.

Example:
<STX>61,4095,<ETX>

118080-001 REV A Page 55 of 95

5.5.16 Request –15V LVPS

Description:
The host requests that the firmware report –15V LVPS.

Direction:
Host to supply

Syntax:
<STX><65><,><ETX>

Response:
<STX><65><,><ARG><,><ETX>

Where:
<ARG>=0-4095 in ASCII format representing unscaled value.

Example:
<STX>65,4095,<ETX>

118080-001 REV A Page 56 of 95

5.5.17 Request Faults
Description:

The host requests that the firmware report Faults.
Direction:

Host to supply
Syntax:

<STX><68><,><ETX>

Response:
<STX><68><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,><ARG5><,
><ARG6><,><ARG7><,><ETX>

Where:
<ARGx> 1 = Fault, 0 = No Fault in ASCII format

ARG1 = ARC
ARG2 = Over Temperature
ARG3 = Over Voltage
ARG4 = Under Voltage
ARG5 = Over Current
ARG6 = Under Current
ARG7 = Watchdog

Example:
<STX>68,0,0,0,0,1,0,0,<ETX>

118080-001 REV A Page 57 of 95

5.5.18 Turn HV on/off

Description:
The host requests that the firmware turn high voltage on or high voltage
off.

Direction:
Host to supply

Syntax:
<STX><98><,><ARG><,><ETX>

Where:
<ARG> 1 = HV on, 0 = HV off in ASCII format

Example:
<STX>98,1,<ETX>

Response:
<STX><98><,><$><,><ETX>
<STX><98><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD,

1 = out of range

118080-001 REV A Page 58 of 95

5.5.19 Program Local/Remote Mode

Description:
The host requests that the firmware to switch between Local and Remote
Mode.

Direction:
Host to supply

Syntax:
<STX><99><,><ARG><,><ETX>

Where:
<ARG> 1 = Remote, 0 = Local in ASCII format

Example:
<STX>99,1,<ETX>

Response:
<STX><99><,><$><,><ETX>
<STX><99><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD,

1 = out of range

118080-001 REV A Page 59 of 95

5.5.20 Program RS-232 Baud rate

Description:
The host requests that the firmware change the Baud rate for RS-232.

Direction:
Host to supply

Syntax:
<STX><07><,><ARG><,><ETX>

Where:
<ARG> 1 = 9.6k in ASCII format

<ARG> 2 = 19.2k in ASCII format
<ARG> 3 = 38.4k in ASCII format
<ARG> 4 = 57.6k in ASCII format
<ARG> 5 = 15.2k in ASCII format

Example:
<STX>07,1,<ETX>

Response:
<STX><07><,><$><,><ETX>
<STX><07><,><ARG><,><ETX>

where <ARG> = error code
Error Codes TBD,

1 = out of range

118080-001 REV A Page 60 of 95

5.5.22 Program User Configs

Description:
The host requests that the firmware program the user configs.

Direction:
Host to supply

Syntax:
<STX><09><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,><ARG5><,
><ARG6><,><ARG7><,><ARG8><,><ARG9><,><ETX>

Where:
<ARG1> = 1 = ROV enabled, 0 = ROV disabled in ASCII format.
<ARG2> = 0-110 in ASCII format representing the overvoltage
percentage.
<ARG3> = 1-600 in ASCII format representing the ramp rate in seconds
from .1 to 60sec.
<ARG4> = 1 = AOL enabled, 0 = AOL disabled in ASCII format.value.
<ARG5> = 0-20 in ASCII format representing the arc count.
<ARG6> = 0-60 in ASCII format representing the arc period in seconds.
<ARG7> = 0-500 in ASCII format representing the arc quench time in milli­seconds.
<ARG8> = 1 = ARC re-ramp enabled, 0 = ARC re-ramp disabled in
ASCII format.
<ARG9> = 1 = No Arc detect, 0 = Arc detect in ASCII format.

Example:
<STX>09,1,50,100,0,10,30,250,1,0,<ETX>

Response:
<STX><09><,><$><,><ETX>
<STX><09><,><ARG><,><ETX>

where <ARG> = error code
Error Codes

1 in ASCII format = Invalid Arc Rate warning message:

An invalid arc rate(Time period/Arc Count) of more than 1 arc per second has
been entered,these values along with the other variables in the command string
have been disregarded by the HVPS.

2 in ASCII format = NAD Enabled warning message:

The Not Arc Detect mode has been enabled. In this mode the HVPS has no Arc
shutdown protection. The HVPS is designed to handle 1 arc per second.
Exceeding 1 arc per second could cause damage to the HVPS.HVPS failure
caused by excessive arcing will not be covered under the warranty.

118080-001 REV A Page 61 of 95

5.5.23 Request unit Scaling

Description:
The host requests that the firmware report the unit scaling.

Direction:
Host to supply

Syntax:
<STX><28><,><ETX>

Example:
<STX>28,<ETX>

Response:
<STX><28><,>< ARG1><,>< ARG2><,><ETX>

Where:
<ARG1> =0-65535 in ASCII format representing the voltage full-scale
value.
<ARG2> =0-65535 in ASCII format representing the current full-scale
value.

Example:
<STX>28, 7000, 856<ETX>
Voltage full scale = 70.00kV
Current full scale = 8.56mA

118080-001 REV A Page 62 of 95

5.5.24 Request User Configs

Description:
The host requests that the firmware report the User Configs.

Direction:
Host to supply

Syntax:
<STX><27><,><ETX>

Example:
<STX>27,<ETX>

Response:
<STX><27><,><ARG1><,><ARG2><,><ARG3><,><ARG4><,><ARG5><,
><ARG6><,><ARG7><,><ARG8><,><ARG9><,><ETX>

Where:
<ARG1> = 1 = ROV enabled, 0 = ROV disabled in ASCII format.
<ARG2> = 0-110 in ASCII format representing the overvoltage
percentage.
<ARG3> = 1-600 in ASCII format representing the ramp rate in seconds
from .1 to 60sec.
<ARG4> = 1 = AOL enabled, 0 = AOL disabled in ASCII format.value.
<ARG5> = 0-20 in ASCII format representing the arc count.
<ARG6> = 0-60 in ASCII format representing the arc period in seconds.
<ARG7> = 0-500 in ASCII format representing the arc quench time in milli­seconds.
<ARG8> = 1 = ARC re-ramp enabled, 0 = ARC re-ramp disabled in
ASCII format.
<ARG9> = 1 = No Arc detect, 0 = Arc detect in ASCII format.

Example:
<STX>27,1,50,100,0,10,30,250,1,0,<ETX>

118080-001 REV A Page 63 of 95

5.5.25 Watchdog Enable

Description:
The host requests that the firmware enable the Communication Watchdog.

Direction:
Host to supply

Syntax:
<STX><89><,><ARG><,><ETX>

Where:
<ARG> 1 = enable, 0 = disable in ASCII format

Example:
<STX>89,1,<ETX>

Response:
<STX><89><,><$><,><ETX>
<STX><89><,><ARG><,><ETX>

where <ARG> = error code

118080-001 REV A Page 64 of 95

5.5.26 Watchdog Tickle

Description:
The host requests that the firmware resets the Watchdog timer.

Direction:
Host to supply

Syntax:
<STX><88><,><ETX>

Response:
<STX><88><,><$><,><ETX>
<STX><88><,><ARG><,><ETX>

where <ARG> = error code

118080-001 REV A Page 65 of 95

5.5.27 Request Analog Monitor Readbacks

Description:
The host requests that the firmware transmit the present values of Analog
Monitor Readbacks.

Direction:
Host to supply

Syntax:
<STX><19><,><ETX>

Example:
<STX><19>,<ETX>

Response:
<STX><19><,><ARG1><,><ARG2><,><ARG3><,><ETX>

Where:
ARG1 = kV monitor = 0 – 4095
ARG2 = mA monitor = 0 – 4095
ARG3 = unused = 0– 4095

Example:
<STX><19>,4095,4095,4095,<ETX>

118080-001 REV A Page 66 of 95

6.0 SERIAL COMMANDS – RS-232 / USB

6.1 SERIAL INTERFACE PROTOCOL

Serial communications will use the following protocol:
<STX><CMD><,>ARG><,><CSUM><ETX>
Where:

<STX> = 1 ASCII 0x02 Start of Text character
<CMD> = 2 ASCII characters representing the command ID
<,> = 1 ASCII 0x2C character
<ARG> = Command Argument
<,> = 1 ASCII 0x2C character
<CSUM> = Checksum (see section 6.3 for details)
<ETX> = 1 ASCII 0x03 End of Text character

6.2 COMMAND ARGUMENTS

The format of the numbers is a variable length string. To represent the number
42, the string ‘42’, ‘042’, or ‘0042’ can be used. This being the case, commands
and responses that carry data are variable in length.

6.3 CHECKSUMS

The checksum is computed as follows:

• Add the <CMD>, <,>, and <ARG> bytes into a 16 bit (or larger) word.
The bytes are added as unsigned integers.

• Take the 2’s compliment (negate it).

• Truncate the result down to the eight least significant bits.

• Clear the most significant bit (bit 7) of the resultant byte, (bitwise AND with

0x7F).

• Set the next most significant bit (bit 6) of the resultant byte (bitwise OR
with 0x40).

Using this method, the checksum is always a number between 0x40 and 0x7F.
The checksum can never be confused with the <STX> or <ETX> control
characters, since these have non-overlapping ASCII values.

If the DSP detects a checksum error, the received message is ignored – no
acknowledge or data is sent back to the host. A timeout will act as an implied
NACK.

118080-001 REV A Page 67 of 95

The following is sample code, written in Visual Basic, for the generation of
checksums:

Public Function ProcessOutputString(outputString As String) As String
Dim i As Integer

Dim CSb1 As Integer
Dim CSb2 As Integer
Dim CSb3 As Integer
Dim CSb$
Dim X

X = 0
For i = 1 To (Len(outputString)) 'Starting with the CMD character
X = X + Asc(Mid(outputString, i, 1)) 'adds ascii values together
Next i

CSb1 = 256 - X
CSb2 = 127 And (CSb1) 'Twos Complement
CSb3 = 64 Or (CSb2) 'OR 0x40
CSb$ = Chr(Val("&H" & (Hex(CSb3))))
ProcessOutputString = Chr(2) & outputString & CSb$ & Chr(3)

End Function

118080-001 REV A Page 68 of 95

6.4 COMMAND OVERVIEW

Data Byte section of the TCP/IP Datagram

Command Name <CMD> <ARG> RANGE
Program RS-232
unit baud rate
Program User
Configs
Program kV 10 1-4 ASCII 0-4095
Program mA 11 1-4 ASCII 0-4095
Request kV
Setpoint
Request mA
Setpoint
Request Analog
Monitor
Readbacks
Request HV On
Hours Counter
Request Status 22 None ­Request Software
Version
Request Hardware
Version
Request Web
Server Version
Request Model
Number
Reset HV On
Hours Counter
Reset Faults 31 None ­Read Interlock
Status
Request kV
monitor
Request mA
monitor
Request –15V
LVPS
Wathdog Tickle 88 None -

07 1 ASCII 1 - 5
09 9 ASCII See

Description

14 None ­15 None ­19 None -

21 None -

23 None ­24 None ­25 None ­26 None ­30 None -

55 None ­60 None ­61 None ­65 None -

Wathdog enable 89 1 ASCII 0 or 1
Turn HV on/off 98 1 ASCII 0 or 1

118080-001 REV A Page 69 of 95

Program

99 1 ASCII 0 or 1
Local/Remote
Mode

6.5 RESPONSE OVERVIEW

The command responses will follow the same format as outlined above in
section 6.1. This list is comprised of Commands with complex responses
only. Commands using a simple response will use the <$> character
(ASCII 0x24) as a “Success” response or a single character error code.
These responses will be eight ASCII characters in length.

Response Name <CMD> Response
Request kV

14 8-11 ASCII
Setpoint
Request mA

15 8-11 ASCII
Setpoint
Request Analog
Monitor

19 12-23

ASCII
Readbacks
Request Total

21 14 ASCII
Hours High
Voltage On
Request Status 22 13 ASCII
Request DSP

23 18 ASCII
Software Version
Request Hardware

24 10 ASCII
Version
Request Web

25 18 ASCII
Server Version
Request Model

26 12 ASCII
number
Request User

27 9-17 ASCII
Configs
Request unit
Scaling
Read Interlock

28 24-32

ASCII

55 8 ASCII
Status
Request kV
monitor
Request mA
monitor
Request –15V
LVPS

60 8-11

ASCII

61 8-11

ASCII

65 8-11

ASCII

118080-001 REV A Page 70 of 95

Request Faults 68 20 ASCII

118080-001 REV A Page 71 of 95

6.6 COMMAND STRUCTURE

6.6.1 Program kV

Description:
The host requests that the firmware change the setpoint of kV.

Direction:
Host to supply

Syntax:
<STX><10><,><ARG><,><CSUM><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>10,4095,<CSUM><ETX>

Response:
<STX><10><,><$><,><CSUM><ETX>
<STX><10><,><ARG><,><CSUM><ETX>

where <ARG> = error code
Error Codes TBD, 1=out of range

118080-001 REV A Page 72 of 95

6.6.2 Program mA

Description:
The host requests that the firmware change the setpoint of mA.

Direction:
Host to supply

Syntax:
<STX><11><,><ARG><,><CSUM><ETX>

Where:
<ARG> = 0 - 4095 in ASCII format

Example:
<STX>11,4095,<CSUM><ETX>

Response:
<STX><11><,><$><,><CSUM><ETX>
<STX><11><,><ARG><,><CSUM><ETX>

where <ARG> = error code
Error Codes TBD, 1=out of range

118080-001 REV A Page 73 of 95