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IPADDR?

Returns the present IP address of the LAN interface, provided it is connected.
If it is not connected, the response will be the static IP if configured to always
use that static IP, otherwise it will be 0.0.0.0 if waiting for DHCP or Auto-IP.
The response is nnn.nnn.nnn.nnn<

RMT

>, where each nnn is 0 to 255.

NETMASK?

Returns the present netmask of the LAN interface, provided it is connected. The
response is nnn.nnn.nnn.nnn<

RMT

>, where each nnn is 0 to 255.

NETCONFIG?

Returns the first means by which an IP address will be sought.
The response is <

CRD

><

RMT

> where <

CRD

> is DHCP, AUTO or STATIC.

The following commands specify the parameters to be used by the LAN interface.

Note:

a power cycle is

required after these commands are sent before the new settings are used (or returned in response to the
queries listed above). The instrument does not attempt to check the validity of the IP address or netmask
in any way other than checking that each part fits in 8 bits. The rear panel LAN RESET switch will override
these commands and restore the defaults as described earlier.

NETCONFIG <

CPD

>

Specifies the means by which an IP address will be sought.

<

CPD

> must be one of DHCP, AUTO or STATIC.

IPADDR <quad>

Sets the potential static IP address of the LAN interface (as on the

webpage).
The parameter must be strictly a dotted quad for the IP address, with
each address part an <

NR

1> in the range 0 to 255, (e.g.

192.168.1.101).

NETMASK <quad>

Sets the netmask to accompany the static IP address of the LAN interface.

The parameter must be strictly a dotted quad for the netmask, with
each part an <

NR

1> in the range 0 to 255, (e.g. 255.255.255.0).

Miscellaneous Commands

*IDN?

Returns the instrument identification. The exact response is determined by
the instrument configuration and is of the form <NAME>,<model>, 0,
<version><

RMT

> where <NAME> is the manufacturer's name, <model>

defines the type of instrument and <version> is the revision level of the
software installed.

*TST?

The PSU has no self-test capability and the response is always 0 <

RMT

>.

*TRG

The PSU has no trigger capability. The command is ignored in this
instrument.

Error Messages

Each error message has a number; only this number is reported via the remote control interfaces.
Error message numbers are not displayed but are placed in the Execution Error Register where
they can be read via the remote interfaces, see Status Reporting section.

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Содержание CPX400S

Страница 1: ...CPX400S SA SP PowerFlex DC Power Supply ...

Страница 2: ... Remote Analogue Control CPX400SA only 15 Remote Interface Operation CPX400SP only 19 Remote Commands CPX400SP only 29 Maintenance 34 Note The latest revisions of this manual device drivers and software tools can be downloaded from http www tti test com go csx This manual is 48511 1520 Issue 8 ...

Страница 3: ...nd current limits of the Custom Limits range can be set to any Vmax between 0 1V 60V and Imax between 0 01A and 20A This facility is most useful in limiting operation to a particular part of the Power Envelope Settings Lock S Lock Voltage and current settings can be locked by a single button press Lock accuracy is equal to meter accuracy see Meter Specification Output Switch Electronic Preset volt...

Страница 4: ...tant voltage mode lamp Constant current mode lamp Unregulated power limit lamp Remote lamp CPX400SP only LAN lamp CPX400SP only Trip message on display METER SPECIFICATIONS Meter Types Dual 4 digit meters with 10mm 0 39 LEDs Reading rate 4Hz Meter Resolutions 10mV 10mA Meter Accuracies Voltage 0 1 of reading 2 digits Current 0 3 of reading 2 digits ANALOGUE REMOTE CONTROL CPX400SA only Isolated in...

Страница 5: ...aud rate 9600 GPIB Conforming with IEEE488 1 and IEEE488 2 USB Standard USB 2 0 hardware connection Operates as a virtual COM port LAN Ethernet 100 10base T hardware connection 1 4 LXI Core 2011 Remote Command Processing Time Typically 25ms between receiving the command terminator for a step voltage change at the instrument and the output voltage beginning to change GENERAL AC Input 110V 240V AC 1...

Страница 6: ...gated by the use of an extension cord without a protective conductor When the instrument is connected to its supply terminals may be live and opening the covers or removal of parts except those to which access can be gained by hand is likely to expose live parts The apparatus shall be disconnected from all voltage sources before it is opened for any adjustment replacement maintenance or repair Cap...

Страница 7: ...ion on the equipment or in the Specification WARNING THIS INSTRUMENT MUST BE EARTHED Any interruption of the mains earth conductor inside or outside the instrument will make the instrument dangerous Intentional interruption is prohibited Ventilation The power supply is cooled by an intelligent multi speed fan which vents at the rear Take care not to restrict the air inlets at top bottom and side p...

Страница 8: ... Remote sense connections to the load if required are made from the positive and negative SENSE terminals Switch the LOCAL REMOTE switch to REMOTE when remote sensing is required Switch back to LOCAL when remote sensing is not in use The terminal marked is connected to the chassis and safety earth ground Rear Panel Connections CPX400SP CPX400SA only CPX400SP CPX400SA ...

Страница 9: ...ches CV and CC to Local when analogue remote control is not in use Analogue Out CPX400SA only Connections VOUT and IOUT provide analogue outputs scaled to the set output voltage and set current limit respectively The scaling is fixed at 0 to 5 Volts for 0 to 100 of maximum output VOUT and IOUT are always present on the terminals whether the instrument is under local or remote control Warning COM i...

Страница 10: ... Socket protocol The instrument also contains a basic Web server which provides information on the unit and allows it to be configured Since it is possible to misconfigure the LAN interface making it impossible to communicate with the instrument over LAN a LAN Configuration Initialise LCI mechanism is provided via a recessed switch on the rear panel marked LAN RESET to reset the unit to the factor...

Страница 11: ...on l and the OUTPUT switch off the output voltage and current limit can be accurately preset using the VOLTAGE and CURRENT controls the upper meter shows the set voltage and the lower meter shows the set maximum current When the OUTPUT switch is switched on the OUTPUT ON lamp and the CV constant voltage lamp light the upper meter continues to show the set voltage but the lower meter now shows the ...

Страница 12: ...t marked on the panel with a The FINE control itself can be usefully used to give an additional fine adjustment of 1 of the range maximum Constant Voltage The output voltage is adjusted using the MAIN and FINE VOLTAGE controls the CURRENT control sets the maximum current that can be supplied The CV lamp lights to show constant voltage mode Constant Current If the load resistance is low enough such...

Страница 13: ...can be completely overcome by using the remote sense facility This requires the sense terminals to be connected to the output at the load instead of at the source insert wires into the spring loaded SENSE terminals and connect directly to the load Switch the LOCAL REMOTE switch to REMOTE To avoid instability and transient response problems care must be taken to ensure good coupling between each ou...

Страница 14: ... OCP is implemented in firmware and can only be set and used when under remote control via the RS232 USB LAN LXI or GPIB interfaces CPX400SP only Setting resolution is 10mA and typical response times are 500ms In local mode and for CPX400S SA OCP is still active but automatically defaults to 22 Amps When the output is tripped the displays will show OUP triP and the OUTPUT lamp will flash Turn the ...

Страница 15: ... select a different range with LOCK enabled is not allowed if attempted the message Unloc is shown briefly in the display and the LOCK lamp is also flashed If the output is also on when these actions are attempted the message turn oFF is first shown in the display accompanied by the output lamp flashing followed by the message Unloc with the LOCK lamp flashing The LOCK status at power on is the sa...

Страница 16: ... default input voltage scaling is 0V to 5V for 0 to 100 of the maximum output voltage The input voltage scaling can be changed to be 0V to 10V by changing an internal shorting link Disconnect the instrument from the AC source and remove the cover as follows Remove the two plastic push rivets at each side edge of the top cover Use the blade of a small screwdriver to first ease out the rivet head an...

Страница 17: ...possible consequential damage Practical Considerations when using CV and CC The stability of the control voltages directly affects the stability of the output Any noise on the control signals will generate noise on the output To minimise noise on the output connect the control voltages to the CV CC and RTN inputs using twisted or screened pairs screens grounded at one end only and keep the connect...

Страница 18: ...el operation in Master Slave configuration permits higher output currents to be realised with equal current sharing between units and control of both voltage and current from a single unit The diagram shows 3 units connected in parallel For equal current sharing each unit must be independently connected to the load with pairs of wires of equal gauge and length to ensure equal voltage drops Connect...

Страница 19: ...cted in series for tracking Volts and tracking current limits Connect the Vout Iout and COM of the master to the CV CC and RTN inputs of the slaves set CV and CC switches to Remote as shown The diagram shows remote sense connections to the load set the front panel sense switch to Remote If remote sensing is not required do not use the sense wires and set the sense switch to Local If independent cu...

Страница 20: ...e that currently has the lock and may be queried from any interface by sending an IFLOCK command The reply to any of these commands will be 1 if the lock is owned by another interface instance 0 if the interface is free and 1 if the lock is owned by the requesting interface instance Sending any command from an interface without control privileges that attempts to change the instrument status will ...

Страница 21: ...n the remote state will once again be entered Returning to Local by this action or by the use of the LOCAL command will keep the V I settings at their last remotely set values with LOCK on and will leave the output in its present state RS232 Interface RS232 Interface Connector The 9 way D type serial interface connector is located on the instrument rear panel The pin connections are as shown below...

Страница 22: ...g for the unique Vendor ID and Product ID in which case the instrument will show in Device Manager as not working properly If this happens select this device right click and choose update driver software and then browse this computer for driver software and then locate the INF file on the CD as described above Once Windows has installed the device driver it will assign a COM port number to this pa...

Страница 23: ...at any time the LAN lamp will go off see LAN Error section for details Web Server Configuration Password Protection The unit contains a basic web server This provides information on the instrument and allows it to be configured The Configure page can be password protected to deter unauthorised changes to the remote operation configuration the default configuration is no password The Configure page...

Страница 24: ...me contains complete commands though commands may be sent with a terminator if desired it will be ignored Each command over TCP behaves as if it is terminated with a command terminator ASCII character 0AH line feed LAN Error If a LAN connection is made but an error is detected e g the IP address is the same as another device on the network then the instrument s LAN lamp above the Output 2 meters w...

Страница 25: ...he response formatter to be reset thus clearing the output queue The parser will then start parsing the next PROGRAM MESSAGE UNIT from the input queue See the Status Reporting section for further information GPIB Parallel Poll Complete parallel poll capabilities are offered on this instrument The Parallel Poll Enable Register is set to specify which bits in the Status Byte Register are to be used ...

Страница 26: ...r Set when a syntax type error is detected in a command from the bus The parser is reset and parsing continues at the next byte in the input stream Bit 4 Execution Error Set when an error is encountered while attempting to execute a completely parsed command The appropriate error number will be reported in the Execution Error Register see Error Messages section Bit 3 Verify Timeout Error Set when ...

Страница 27: ... Bit 0 Set when output enters voltage limit CV mode Status Byte Register and Service Request Enable Register These two registers are implemented as required by the IEEE Std 488 2 Any bits set in the Status Byte Register which correspond to bits set in the Service Request Enable Register will cause the RQS MSS bit to be set in the Status Byte Register thus generating a Service Request on the bus Th...

Страница 28: ...27 Status Model ...

Страница 29: ... with the front panel controls active The instrument parameters at power on are the same as at last switch off with the exception of the output status By default this is always off at power on but the user may change this from the front panel to the same at power on as at switch off see Switching On paragraph in the Manual Operation section The RST reset interface command resets the instrument to ...

Страница 30: ...HITE SPACE is ignored except in command identifiers e g C LS is not equivalent to CLS The high bit of all characters is ignored The commands are case insensitive GPIB Remote Command Formats GPIB input to the instrument is buffered in a 256 byte input queue which is filled under interrupt in a manner transparent to all other instrument operations The queue contains raw un parsed data which is taken...

Страница 31: ... command format entirely compatible with that used on multi output TTi programmable power supplies a dual output supply for example would have a duplicate set of commands V2 NRF I2O etc CPD CHARACTER PROGRAM DATA CRD CHARACTER RESPONSE DATA The commands which begin with a are implemented as specified by IEEE Std 488 2 as Common commands All will function when used on the other interfaces but some ...

Страница 32: ...d verify INCI N Increment the output N current limit by the step size set for output N DECI N decrement the output N current limit by the step size set for output N OP N NRF set output N on off where NRF has the following meaning 0 OFF 1 ON OP N Returns output N on off status The response is NR1 RMT where 1 ON 0 OFF TRIPRST Attempt to clear all trip conditions LSR N Query and clear Limit Event Sta...

Страница 33: ...est Enable Register in NR1 numeric format The syntax of the response is NR1 RMT STB Returns the value of the Status Byte Register in NR1 numeric format The syntax of the response is NR1 RMT WAI Wait for Operation Complete true As all commands are completely executed before the next is started this command takes no additional action Interface Management Commands LOCAL Go to local This does not rele...

Страница 34: ...G CPD Specifies the means by which an IP address will be sought CPD must be one of DHCP AUTO or STATIC IPADDR quad Sets the potential static IP address of the LAN interface as on the webpage The parameter must be strictly a dotted quad for the IP address with each address part an NR1 in the range 0 to 255 e g 192 168 1 101 NETMASK quad Sets the netmask to accompany the static IP address of the LAN...

Страница 35: ...the ventilation holes that secure the fan mounting bracket to the chassis Unplug the fan cable assembly from the Main PCB Carefully remove the fan and mounting bracket this may require the connection assembly between the Interface PCB and control PCB to be removed CPX400SP only 4 Undo the two nuts securing the orange and black wires from the Power PCB to the Main PCB studs and disconnect the wires...

Страница 36: ......

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