User`s guide

6625A, 6626A, 6628A, 6629A:
These models have 11 internal
registers, which have the
following characteristics:
• Register 0 is recalled
automatically at power-on.
• Register 0 stores: VSET,
VRSET, ISET, IRSET, OVSET,
OCP, DLY, and MASK for
all outputs.
• Registers 1-10 save: VSET,
VRSET, ISET, IRSET, and
OVSET for all outputs.
• At power-on, registers 4-10
are reset to 0 V and minimum
current.
• Registers 0-3 can only be
saved once per power-on.
Power needs to be cycled to
re-enable writing to these
non-volatile registers.
• If registers 0-3 are written
to more than once per
power-on cycle, Error 30
“STORE LIMIT” will result.
• When a register is recalled,
the outputs are set
sequentially (1,2,3,4).
N6700A:
The N6700A has 11 internal
registers, which have the fol-
lowing characteristics:
• Register 0 is recalled
automatically at power-on
ONLY if the power-on state
is set to RCL0 by sending
the command “OUTPut:
PON:STATe RCL0”.
• All registers (0-10) store:
VSET, VRSET, ISET, IRSET,
OVSET, OCP, and DLY. The
state of the MASK register
is not stored.
• At power-on registers 2-10
are reset to minimum voltage
and minimum current.
• The non-volatile registers
(0-1) can be written to more
than once per power-on cycle.
• When a register is recalled,
the outputs are set
sequentially (1,2,3,4).
Table 7 below shows the differ-
ences between the 662xA and
the N6700A’s memory states.
Clear Command (CLR)
The Clear “CLR” command is
typically used in systems to
send all devices in the system
to a known state with a single
command. Please see Table 4
in the Initial Conditions
section for the “CLR” values.
13
Non-Volatile Registers Volatile Registers
6621A, 6622A, 6623A, 6624A, 6627A 0 10—Registers 1-10
6625A, 6626A, 6628A, 6629A 4—Registers 0-3 7—Registers 4-10
N6700A 2—Registers 0-1 9—Registers 2-10
Table 7. Memory STO/RCL States