EPS RS 232, Manual

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Universal interface (Option)
16
Detailed description of commands
CLS* or CLS - Clear Status
This command deletes the status byte. It affects only the status byte of the interface, the command was sent from. No
return value. For detailed description of the status byte see the different interface chapters.
DAT,<U>,<I> - Data
Data for a user-defined characteristic. No return value. For detailed description of this command see
Wavereset
.
DCL - Device Clear
This command resets the initialization data. No return value.
Caution: Interface parameters are also reset!
GTL - Go To Local
This command activates front panel operation. If ‚Local Lockout‘ (LLO) was activated before, it will also be reset. No
return value.
GTR[,{0|1|2}] - Go To Remote
This command activates digital interface operation. The optional parameter affects the future behavior of the unit
after switch on. Setting is saved permanently. No return value.
Optional parameter 0 = Deactivates automatic remote operation
The command GTR must be entered to activate the unit’s remote operation mode. This mode is useful if the unit shall be operated
manually and at the same time, measurement values shall be read out via the digital interface.
Optional parameter 1 = Activates remote operation on first addressing
Unit switches to remote operation when receiving a command via digital interface. The only exception is the GTL command, which
switches the unit to local mode.
Optional parameter 2 = Activates remote operation immediately after switch on
After the unit was switched on, remote mode is immediately activated. Front panel operation is deactivated.
IA[,<imax>] - Set I
max
This command adjusts current limiting. Entering the command without parameters displays the set value. If the set
value is higher than the maximum current of the unit, the range-error-bit within the ESR register of the interface is set.
The present set value remains unchanged. If the set value is higher than the I
limit
value, which was adjusted by the
user’s settings, but lower than the maximum current of the unit, the current is limited to the I
limit
value. No error
message.
Example: 300 A unit, I
limit
adjusted to 200 A via configuration menu
GTR
Remote operation
OVP,200 Over voltage protection 200 V
UA,10 Output voltage 10 V
IA,100 Output current 100 A
SB,R Output open
IA,400 Output current 400 A, this command is ignored, because the current is higher than the maximum current of the device.
„Rangeerror“ is set within the status byte.
IA,250 Output current 250 A, since the output current was limited to 200 A via configuration menu, current limiting is set to 200
A. Error bit is not set.
IA Query of the adjusted current.
IA,200.0A Unit answers: I
limit
= 200 A
In master/slave mode, the current of a programmed device is adjusted. Connected in parallel, the total current is n x IA.
Example:
In M/S mode, 3 devices are connected parallel. IA,10 programs an output current of 10 A. All connected devices are set to 10 A. Since 3
devices have been connected parallel, the total current is 3 x 10A = 30A.
ID or IDN? - Identification
This command displays the identification string. Return value: <ID-String>.