Caen EASY3000, Техническое руководство

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Document type: Title: Revision date: Revision:
User's Manual (MUT) EASY3000/4000 Embedded Assembly SYstem 01/09/2005 5
NPO: Filename: Number of pages: Page:
00105/03:A1676A.MUTx/05 A1676A_REV5.DOC 27 12
2.3.5 Control signals
The Branch Controller Control signals are described in the following table.
Table 2.1 – A1676A Control Signals
SIGNAL DESCRIPTION
HVCK
625 kHz synchronisation signal (one per branch) for switching parts of remote PS
channel boards; however, if this signal fails, remote boards run properly (a
synchronisation signal is generated by their controller), though lose synchronisation
between each other, and an error message (“Fail”) is returned by the SY1527. The
HVCK presence is signalled by the remote board parameter “HVSync” (Ok or Fail)
SYNC
50 Hz clock (one per branch) for the board controllers synchronisation; if this signal
fails, remote boards do not operate and an error message (“Fail”) is returned by the
SY1527. In order to remove the Fail message, it is necessary to send the “Clear
Alarm” command
DATA
Communication data line
REC
Recovery / Reset lines, one for each remote EASY3000 crate; through the SY1527 it
is possible to send a command to the controllers of a remote crate either switching off
all the channels in the crate (HW Reset) or eventually leaving them on, if they were
(Recovery)
The A1676A Branch Controller allows also to use the SY1527 System front panel signals
(Kill, Interlock, Enable) on the remote channels.
2.4 A1676A Communication timing
2.4.1 Foreword
The A1676A board can handle, via the CANBUS protocol, up to 6 remote crates in
parallel (EASY bus).
The remote crates, which can be of two different kinds developed so far, EASY3000 and
EASY4000, can house respectively up to 23 and 20 nodes (EASY power supply boards,
optional Fan Units and A34xx AC/DC Converters).
2.4.2 Communication mode
A remote board is defined by its number of channels along with the type and number of
associated parameters.
Such parameters allow both to control the channel and to monitor constantly its status.