User Manual Manual

6.3 Command Descriptions
APS-1102 Programmable AC/DC Power Source 6-10
b) SCPI data format
All command messages and acknowledge messages sent to the APS-1102 are in “ASCII” format.
Table 6-11. Numerical Value Data Format
Symbol Data Format
<NR1> Numerical values without a decimal point (decimal position is to the right of the
smallest digit in value) Example: 273
<NR2> Numerical value with explicit decimal point Example: .0273
<NR3> Numerical value with explicit decimal point and exponent Example: 2.73E+2
<Bool> Boolean value (logical value) Example: 0 | 1 or ON | OFF
Table 6-12. Character Data Format
Symbol Data Format
<CRD> Character format Example: SIN
<SRD> Character format with double quotations Example: “No error”
 Binary block data format
The binary block data format is shown in Figure 6-1.
Figure 6-1. Binary Block Data
The “non-zero numeral” element value indicates the number of “numeral” elements that follow
afterward. The “numeral” element value indicates the number of “8-bit data byte” elements that
follow afterward.
For example, the format is as follows when sending four of the 8-bit data byte <DAB>.
#14<DAB><DAB><DAB><DAB>
c) Common commands
The common commands are used to provide overall control of device functions, such as device reset
and status monitoring. These common commands have three-letter names that start with an asterisk.
Non-zero
numerals
Numerals
8-bit data byte