Fdb" Command - Caen ELS LiAM 6005 User Manual

LiAM User's Manual

5.3.1 "FDB" Command

The 'FDB' command is a custom command that was especially implemented,
as in all series of power supplies made by CAENels, in order to minimize traffic on
the Ethernet 10/100 communication socket, having a dedicated request/reply structure.
The feedback command syntax is as follows:
where:
 set_reg: is the setting register of the power supply (8-bit wide);
 i_set: is the desired output current setpoint value [A].
The power supply reply, after a FDB command, is in the following format:
where
 status_reg: is the 16-bit wide status register of the PS, formatted in an
hexadecimal string; this status string has a fixed-length of 4-byte;
 i_set: is the string containing the output current desired setpoint value; string
length is 8 bytes (i.e. 8 characters): sign + 2 integers + "." + 4 decimal digits
(eg. 1,02A it is returned as +01.0200);
 i_read: is the output current readback string; its length is equal to 8 bytes: sign
+ 2 integers + "." + 4 decimal digits;
The status_reg structure is presented in the following table (and in section 3.3):
Bit 15
Bit 14
Bit 13...12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
53
FDB:set_reg:i_set\r
#FDB:status_reg:i_set:i_read\r
Status Register Structure (16-bit)
TURNING OFF
RAMP EXECUTION FLAG
RAIL STATUS [1...0]
reserved
OVER-VOLTAGE
LOAD FAULT STATUS
RAIL UNDERVOLTAGE
REGULATION FAULT
INTERLOCK #2
INTERLOCK #1
Remote Control