EPS RS 232 - Universal Interface Instruction Set; Command Syntax Conventions

Universal interface (Option)
Instruction Set
The IEEE-488.2 standard demands several basic commands. Some commands may occur twice for compatibility
reasons (once in the EPS version and once in the (old) IEEE-488.2 version). The following syntax is used to describe the
commands:
[] Square brackets  optional parameter
<> Angle bracket  numerical value
{} Curly bracket  selection list
| Vertical line  separator within selection list
Example
GTR[,{0|1|2}] means that the command GTR can be used with or without parameters. If a parameter exists, it has to be 1, 2 or 3. Valid
commands are: GTR GTR,1 GTR,2 GTR,3
IA[,<imax>] means that the command IA can be used either with or without parameters. If a parameter exists, it has to be a numerical
value.
Quick view of commands
Command Description Result
CLS* or CLS
Clear Status
Deletes the status byte
DAT,<U>,<I>
DIP
Data for user
-
defined characteristic
DCL
Device Clear
Initialization data reset
GTL
Go To Local
Activates front panel operation
GTR[,{0|1|2}]
Go To Remote
Activates digital interface
operation
IA[,<imax>]
Set I
max
Adjusts current limiting
ID or *IDN?
Identification
Displays identification string
IMPP[,<impp>]
Set I
mpp
Adjusts MPP current during PVsim mode.
LLO
Local Lockout
Deactivates LOCAL button
LIMI
Limit I
a
Reads maximum
adjustable current limitation
LIMP
Limit P
a
Reads maximum unit output.
LIMR
Limit R
Reads adjustable range for R
i
within UIR mode.
LIMRMAX
Limit R
max
Reads maximum adjustable range for R
i
within UIR mode.
LIMRMIN
Limit R
min
Reads minimum adjustable
range for R
i
within UIR mode.
LIMU
Limit U
a
Reads maximum adjustable voltage limitation
MODE[,{UI|UIP|UIR|PVSIM|
USER|Skript}]
Set Mode Selects operation mode
MU[,<Nr>]
Measure U
a
Measures present output voltage
MI[,<Nr>]
Measure I
a
Measures present
output current
*OPT?
Optional Identification Query
Displays units current hardware/software version
OVP[,<U
ovp
>]
Overvoltage Protection
Adjusts over voltage protection
PA[,<P
limit
>]
Set P
max
Adjusts power limitation
PCx[,<baud>,<parity>,
<data bits>,<stop bits>,
<handshake>,<echo>,
<timeout>]
Program
Communication
Adjusts the interfaces
RA[,<R
i
>]
Set R
i
Adjusts internal resistance
REGLER[,<Nr>,<Kp>,<Ki>,
<Kd>]
Controller Parameters Adjusts controller parameters for UIP, UIR and PVsim mode
RI or
*RST
Reset Instrument
Resets hardware (no return value)
SB[,{S|R|1|0}]
Standby
Enables/blocks the output
SCR[,<CMD>[,<value>]]
Load Script
Programming of script memory
SS or *PDU Save Setup
Saves previously made channel and interface parameter
adjustments (no return
value)
STATUS Status
Query of the units status (return values in binary format) (also see following
table)
STB or *STB?
Interface Status
UA[,<ua>] Set U
a
Adjusts output voltage (if there are no parameters, present set point is
displayed)
UMPP[,<umpp>] Set U
mpp
Adjusts MPP voltage in PV
sim
mode (if there are no parameters, present set point
is displayed)
WAVE End Userwave Data
Ends transfer of user
-
defined output characteristic (gradual interpolation of
intermediate values)
WAVELIN End Userwave Data
Ends transfer of user
-
defined output characteristic (linear interpolation of
intermediate values)
WAVERESET,<Um>,<Im>
Start Userwave Data
Starts transfer of user
-
defined output characteristic