CAEN crate SY4527

How to change crate IP address

When a new IP address is assigned to the crate, you have to change the network parameters to the crate itself. To date the crate has not a screen, so you have to proceed as follows:

  • plug the crate ethernet cable to a pc
  • type the old crate IP address on a browser: the crate web tool to manage crate connection status will open (user: admin, pwd: admin)
  • browse to Setting Menu->Networking and modify the "LAN", "Gateway" and "Hostname and DNS" fields with the new network parameters provided by CERN-IT. Click save.
  • unplug the ethernet cable and plug it to the socket, and check with GECO.
  • to use the WinCC project you have to change the IP address to the CAEN OPC server too.

If it is not possible to connect the crate to the PC via ethernet connection, DHCP might be enabled on the machine. In this case, the machine has to be reset to default settings. This can be done by connecting a USB keyboard to the crate and using the key combination [CTRL]+[ALT]+[DEL]. The crate will produce a beeping sound. About 15 seconds after the sound the machine should be power-cycled. It is now set to the default IP , which can be changed by the procedure specified above. In case DHCP is enabled, it has to be disabled for the machine to be connected to the CERN network.

LV boards and parameters

The LV board for the DAQ is the CAEN A1517A (floating channels). LV channels should be set to 3.3V with the fastest ramp time and the kill option on trip. Current limit of about 1.5A should be sufficient (allows for a fully populated EC).

The LV board for the ELMB power supply is the CAEN A1513A (floating channels). The ELMB requires two 10V power supplies. The current limit should be set to 0.5A.

HV boards and parameters

The HV board is the CAEN A1538DN (common floating channels). HV channels should be set to 1000V during standard operations. Baseboard-R has four 3 MOhm voltage dividers in parallel, so the current limit should be set to 1350 uA. Baseboard-H has a 2.5 MOhm voltage divider, so the current limit should be set to 410 uA.

Crate communications

You can communicate with the crate using telnet or the CAENGECO2020 control software tool or the WinCC project TB_DCS. The latter allows the integration of the temperature monitoring.

Telnet access

Host name IP address Port Login 4527 admin/admin

Example command to connect to terminal console:

telnet caensy4527richtb 4527

GECO access

Double click the GECO shortcut on pclhcb182 desktop to start the software.

Lab Control and Monitoring

Click on the face icon on the toolbar at the bottom of pclhcb182 desktop. Click yes on the pop-up window that asks if you want to run WinCC as admin. On the console click on the TB_DCS project. On the toolbar at the top of the console click on the (green) traffic light. The project will start. Wait about a minute to be sure that everything is running. Then click on the Lab2016 shortcut on the desktop.

FSM Control and Monitoring

Safety warning: please check before the box is closed or the interlock is active to operate the FSM :)

Double click the FSM2016 shortcut on pclhcb182 desktop to start the operations. Right click on the TB_DCS node. Click the lock near the TB_DCS state in the new panel, and click the Take button. The tree viewer and the panel will get colours.


The sub-systems (aka partitions) are HV, LV, Temperatures and DAI. Double click on one of them to browse to the corresponding lower level of the FSM. HV and LV layers have the same available actions, depending on the state they are. Temperature layer behaves exclusively as an input, so no action is available on it. DAI layer contains information about the crate and ELMB status.

To send commands (or to see available ones) you have to click on the colored state.

When everything is up and running the TB_DCS node must be in state READY. If any of the HV, LV and DAI layer is in state NOT_READY (i.e. something is off) the TB_DCS node state is NOT_READY.

When one or more of the HV and/or LV channels is off, you can send the Go_READY action from the TB_DCS node to switch on everything. If you want to switch off HV and LV, you have to send the Go_NOT_READY action from the TB_DCS node.

If you want to switch off (on) the HV or LV sub-system, you can send the SWITCH_OFF (SWITCH_ON) command from the corresponding partition. You can do the same to turn off (on) a single LV/HV channel.


Overview and database panel

From the top node panel, you can open the overview and database panel. Click the Select and plot button if you want to show the trending of up to 8 variables. In the tree that appears you have to select the variables you want (press Ctrl to select more than one variable). If everything is fine, all the text fields in the overview panel have to be green. If someone is yellow it means there is a warning (please investigate why), if something is red call an expert (not during HV ramp up; it is normal for voltages up to about 300 V to have red text fields).


HV scan

  • You can change voltage, current limit, ramp up and down speeds settings sending the CHANGE_SETTINGS action when the HV partition is in state READY, and clicking the Send action button in the popup panel. Note that the settings are changed immediately. When you set the voltage to lower values, you have to wait to set the new current limit (if you want to change it you have to do it manually for each channel), otherwise the channel will probably TRIP.

  • You can change channel settings individually double clicking on the corresponding channel on the HV partition. Click on the row corresponding to the setting you want to change on the grey column Setting, write the new value in the text field that will appear and click Apply.

Enabling the LED

The LED LV channel is disabled in the FSM. This means that the commands do not act on it and the states do not depend on it. To use LED you have to click on the red cross near the LED state and click on enable in the popup panel. To disable LED (or any other device) click on the green tick and on disable in the popup panel.

Note on the EMERGENCY state

If any temperature sensor value is over an alarm threshold (it is possibile that this happen if a temperature sensor is broken; in this case disable it in the same way of the LED), the FSM will go in EMERGENCY state, and an automatic action switch off HV and LV. If the FSM is in the EMERGENCY state the first thing to do is to investigate why and to conclude if this is due to a spike in the temperature sensor or if it is a true problem. When you feel everything is back to normality send the Clear_EMERGENCY action. Due to non triviality of the system, the Clear_EMERGENCY action will switch on all the HV and LV channels! If you want to carry out some tests, change the settings for each channel individually, and then send the Clear_EMERGENCY action.

Restart the FSM

If the FSM is stuck (tipically when something went wrong during HV scan setting changes), the state name is not black but grey. Click on the state and send Restart FSM. Then you have to take again the FSM from the TB_DCS node as explained at the beginning of the twiki.

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng Take.png r1 manage 78.6 K 2016-06-25 - 14:43 GiovanniCavallero  
PNGpng nodes.png r1 manage 94.9 K 2016-06-25 - 14:43 GiovanniCavallero  
PNGpng overview.png r1 manage 72.4 K 2016-06-25 - 14:43 GiovanniCavallero  
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Topic revision: r9 - 2016-10-05 - MichelePieroBlago
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