CAEN
Electronic Instrumentation
UM2679 – A1536 AG536 Family Power Supply Boards
10
3.
Operating modes
The Mod. A1536 / AG536 board can be controlled, either locally or remotely, through the SYSTEM software
interface. For details on SYSTEM operation, please refer to the User's Manual of this product. The following sections
contain a description of commands available for the board control and status monitoring.
Output control and monitoring
For each output channel, it is possible, through the system, to access the following parameters:
CHANNEL NAME (settable)
descriptive name for the relevant channel
V0SET (settable)
the first of the two allowed voltage programmable values.
I0SET (settable)
the first of the two allowed current limit programmable values
V1SET (settable)
the second of the two allowed voltage programmable values
I1SET (settable)
the second of the two allowed current limit programmable values
RUp (settable)
the Ramp-Up parameter value, i.e. the maximum voltage programmable increase rate.
RDWn (settable)
the Ramp-Down parameter value, i.e. the maximum voltage programmable decrease rate.
TRIP (settable)
the TRIP parameter value, i.e. the maximum time an Over Current condition is allowed to last.
SVMAX (settable)
the maximum voltage value programmable for the channel. If the value set as SVMAX is less than
the current value of the V0SET/ V1SET parameter, the latter will automatically decrease to the
SVMAX value.
VMON (monitor)
monitored voltage value
IMON (monitor)
monitored current value
STATUS (monitor)
it displays the channel status.
PW (ON/OFF)
the Power parameter shows the ON/OFF channel status. As this parameter is set ON, the channel
is switched on (if the INTERLOCK is not active and if the channel is enabled either locally or
remotely) highlighted in green when channel ON; onstate = ON; offstate = OFF
POn (EN/DIS)
Power-On option, which can be enabled or disabled. If this option is enabled, at Power-On or
after a Restart each channel is restored in the same condition (defined by the Power parameter)
it was before the Power-Off or Reset. If this option is disabled, at Power-On or after a Restart all
the channels are off, independently from the condition in which they were before the Power-Off
or Reset ; onstate = Enabled; offstate = Disabled
PDwn (Kill/Ramp)
Power-Down option, which can be set as KILL or RAMP. It affects the way the channels react at a
Power-Off command caused by a TRIP condition. If the KILL option is selected, the relevant
channel will be switched off at the maximum rate available. If the RAMP option is selected, the
voltage will drop to zero at a rate determined by the value of the Ramp-Down parameter
programmed for that channel; onstate = Ramp; offstate = Kill
TripInt (settable)
2N-bit word (hexadecimal) maximum 16 lines, where N is the number of the board’s Internal Trip
Bus lines. Bits [0;N-1] allow the channel to sense the trip status from the corresponding lines
when set to one; in the same way, bits [N;2N-1] allow the channel to propagate the trip status
over the Trip Bus: bit N on line 0 and so on (see SY4527 User’s manual).
TripExt (settable)
Must be set in the 0÷255 range (hexadecimal). Bits [0;3] allow the channel to sense the trip
status from the corresponding lines when set to one; in the same way, bits [4;7] allow the
channel to propagate the trip status over the trip bus: bit 4 on line 0 and so on (see SY4527
User’s manual).
If the POWER ON option is enabled, the channel, at POWER ON, is restored in the same condition it was before the
POWER OFF or RESET; if this option is disabled, at POWER ON or after a RESET, the channel is kept OFF
independently from its previous condition.
The following messages may be returned by the SYSTEM when monitoring the channel status:
OFF
(channel turned OFF)
RUP
(channel ramping up)
RDWN
(channel ramping down)
OVC
(channel in OVERCURRENT condition)
