How to open an ACNET terminal (from the MCenter Control Room)

1) Open a console.

setup ftbf

2) Go to /home/nfs/ftbf_user/acnet.

cd /home/nfs/ftbf_user/acnet

3) Run the launch_acnet_console command. This will get automatically a kerberos ticket with settings permissions and launch and acnet console.


4) Go to page H53 (type H53 in the top left corner of any window):

Make sure you are on tab "F2400C1" (must be highlighted in yellow, otherwise just click on it). The number between "< >" indicates the subpage. You can change the subpage by either clicking on the + / - signs or entering the number directly between the brackets.

  • The COW entries (read only) can be found on subpage 74.
  • The VME power supplies are between subpages 88 and 94.
  • The Glassman is on subpage 94.

For the tertiary beam magnets, go to page S60, subpage 1, "MCNTR" tab. F:MC7AN is for the magnets, F:MCHILL controls the chiller.

Controlling the power supplies

Enable ACNET settings permissions

Find the utilities window among the opened windows. On the last column on the right hand side, click on "Settings" and select for how long you would like them to be enabled. By default it is set to "Disabled".

Keep in mind that in ACNET, clicking or hitting "enter" is equivalent, so you could turn off or change a setting by mistake if you are not careful. Disable settings as soon as you are done to prevent mistakes.

Turning on/off a power supply or device

On the right hand side of the window, the device status is indicated in the blue rectangle.

  • A red star and a green dot (as shown on the screenshot) indicate that the device is OFF. To turn it on, click on the "*.". A menu will pop up with various choices depending on the device. Select "ON". The red star should turn into a green dot.
  • Two green dots indicate that the device is ON. To turn it off, set the value to 0 and click on the 2 dots and select OFF. The first dot should turn into a red star.
Some particular cases:
  • Some power supplies might have the "regulate" ON/OFF option. This feature is to match the input value to the readout. An "R" will show next to the 2 dots if the regulate feature is on. Leave it off since it is confusing to use this through ACNET.
  • For the tertiary beam magnets, you should click on "RAMP" after turning them on. The magnets are set to DC mode by default, which does not allow to go beyond 20A. You must switch to RAMP mode.
  • In the screenshot above you see the power supplies for the cryogenic PMTs. E:LHV2A and E:LHV2AR control exactly the same power supply. E:LHV2A will go immediately to the set value (as quickly as possible) whereas E:LHV2AR will slowly ramp to the value.

Setting a voltage / current

To enter a new current or voltage value, type the desired value where the yellow "0" is (yellow rectangle). Hit enter/ click right after the last number of the entered value. To delete undesired values, hit the space bar until the undesired numbers disappear and then click / hit enter. In some cases, you might have to include the sign of the value, i.e. type -150 and not just 150 if it is a negative voltage power supply (valid for ALL VME power supplies).

If the device is read-only, there will be no yellow 0 and you will not be able to enter any value.

Note: If you used ACNET to change voltages, the last setting you entered might appear in the magenta rectangle. ACNET saves the last value entered, which is why it is very important to set a supply to 0 before turning it off, otherwise as soon as you turn it on, it will go back to the last stored value.

The green numbers indicate the readout value with the unit. This number might not match exactly the set value, in particular for the VME power supplies. Just adjust the input value until the readout reads the value you need.