Progress report on the HMPID LV System

1
Progress report on the HMPID LV System

• Cabling and LV sectors
• The WIENER PS Low Voltage Solution
• System Improvements with the New A1676W R3.04
  Firmware
• Preliminary Test results
• Conclusions

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Cabling and LV sectors
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Cabling and LV sectors
LV Sensing wires
Sensor cables
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The LV System Setup with the WIENER PL500 F8
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Main goals of the PL500 F8 remote control
Requirements of the remote control system
complete, fast and reliable.
Complete each LV channel has to be equipped with
an exhaustive set of controlled parameters,
including the power On/Off, the single channel
Trip Off and the channel grouping for bipolar
electronics that are missed in the present Wiener
PS version.
Fast the remote control response time in case of
OVV, OVC, should be as fast as possible to
prevent electronics' damaging.
Reliable the system safety has to be anyway
ensured in case of missing Ethernet and/or Can
Bus connection, SY 1527 Power cut off and/or
control software (PVSS) crash.
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A1676W Can Bus Branch Controller
A1676W Interface Board

• A1676W Wiener PS Controller characteristics
• The Model A1676W is a board, designed for the
  SY1527/2527/3527 System family, which
• allows to control up to 8 W-IE-NE-R Mod. PL500
  power supplies via CANBUS. The board
• is single-width.
• The A1676W can handle 64 PS channels, since each
  PL500 can house up to 8 channels. All the
  channels are seen as Caen channels.
• The board allows to control the PS channels
  through a complete set of programmable
• parameters, such as output voltage, current
  limits, etc.

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The improved features of the PL500F8 via the New
A1676W R3.04 Firmware

• New Channel Features
• Single Channel ON/OFF (CH PW)
• Single Channel TRIPOFF (CH TRIPOFF)
• Channel Grouping
• New PL500 feature
• Enable/disable the Bipolar Grouping Mode (CR
  GRP).

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Telnet Window New A1676W R3.04 Firmware
Telnet Window
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Measure of the Channel Tripoff Response Time (TR)
A CH TRIPOFF has been induced (OVC on Ch1), we
measured the switch OFF time of the single
channel (reaction time).
LECROY 9310AM
Telnet connection
Can Bus (speed 1 Mbps)
Can Bus probe 1
CAEN SY 1527
A1676W
WIENER PL500 F8 Power Supply
Channel 1 probe 2
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Statistical analysis of TR
A1676W FW R. 3.04
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Measure of the Crate Tripoff Response Time
When the crate TRIPOFF option is enabled, on the
over-current occurrence, about 5 ms are requested
to switch OFF the entire power box.
LECROY 9310AM
WIENER PL500 F8 Power Supply
Channel 1 probe 1
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System reliability
In case of CANbus controller power cut (SY1527
power cut) , an Interlock signal switches Off the
connected PSs. Recovering of the settings after
a power cut is guaranteed since all the values
are written in the E2PROM of the A1676A.
In case of CANbus disconnection, the occurrence
of an over current can be limited by setting each
channel Current Limit equal to the OVC. Is now
under study the activation (via PVSS) of the the
Interlock line to switches Off in a selective way
the unplugged PS.
If the Ethernet connection is missed, the system
still remains in its full operation.
Ethernet Connection
CAEN SY 1527
A 1676W
WIENER PL500 F8 POWER SUPPLY
Can Bus
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Conclusions

• The PL500F8 technical specifications fits the LV
  sector requirements but the control features.
• The prototype of the new project CAEN WIENER
  (A1676W), with single channel ON/OFF, grouping,,
  is now running! The test results on the reaction
  time, are in agreement with the expectations and
  are very encouraging!!
• The PVSS HMPID LV Control has been updated
  taking into account the new PS features