I404, BPM, Tango

The I404 electrometer is used for the PETRA III beam position monitors (BPM). We operate the device usually at a speed of 115200 bd (ASCII, Mode: 3).

The Tango server properties can be found below. In general this server is monitored and operated from jddd panels. Depending on the beamline these panels are invoked by BPM, BPM1 or BPM2.

Figure 13.1: Properties of the I404 Server

For testing purposes one can connect to a I404 via telnet: telnet hasptsXX 10015. Here are some commands that can be entered.

 
I404 Commands

*IDN? 
  PYRTECHCO,I404-REV0,0000001079,4.1F/14.0.8

*rst
  reset

calib:gain
calib:gain?
  calibrate/query gain for each channel

calib:source 1
  set source to channel 1
calib:source 0
  set source off
calib:source?
  query source status

conf:cap?
conf:cap 0 
  100 pF capacitor
conf:cap 1
  3300 pF capacitor

conf:int
conf:int?
  set/query the number of integrations per reading

conf:mon 1 
  no position calculations
conf:mon 2 
  quadrant mode calculation
conf:mon 3
  split mode calculation  

conf:per? 
  query integration period 

conf:range
conf:range?
  set/query the full scale current range

conf:read
conf:read?
  set/query the number of adc readings that to be taken in each 
  integration period, 0 - 15

conf:res
conf:res?
  set/query the number of bits of effective resulution, 16 - 20

read:curr?
  return the last measured current data

read:pos? 
  perform position calculation and return result, in conf. calc. mode

syst:comm:check 0
  disables the appended checksum