Remote Operation
76
The Clear Command
This command will return the power supply to its power-on state and all parameters are returned to their initial power-on
values except for the following:
1. The store/recall registers are not cleared.
2. The power supply remains addressed to listen.
3. The PON bit in the serial poll register is cleared
To clear the power supply, send the following command:
CLR
Status Reporting
The power supply has the ability to report its internal status to the user whenever it is asked to do so. Depending on the type
of status the user requested, the supply will interrogate the status, accumulated status, mask, or fault registers present in
each output. The status register can report status independently (see page 76) or it can work together with the mask and
fault registers to report a fault (see page 77). The accumulated status register records every status condition the output
experienced since the time it was last read (see page 77). Figure 5-3 shows a conceptual model of the operation of these
registers.
Figure 5-3. Functional Relationship of Status Registers
The supply has one serial poll register which services all outputs and provides the user with other power supply status-
related information as discussed in page 78.
Status Register
. Each output channel of the power supply maintains its present status in an eight bit register. This status
register reports the status of the output channel whenever it is queried. A "1" in any of the bit positions indicates that the
condition is true. As long as the condition continues to be true, the bit will remain set. Assignments for the bits are shown in
Table 5-5.
Decoding of the reading is based on the weighted number placed on each bit of the eight bit status registers. For example,
bit position 5 in the register has a bit weight of 32 (see Table 5-5). Each bit is assigned to a particular condition and the
corresponding bit weight is used to identify that condition. When set, bit 5 indicates that the associated output is in the
unregulated state. If this is the only bit that is set, the number 32 will be returned when the output’s status register is
queried.
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