Amrel PPS-1326 - Overcurrent Protection (Ocp); Fundamentals of Programming

30
5.5.5 OVERCURRENT PROTECTION (OCP)
The overcurrent programming feature protects the load from excessive output currents. The OCP mode cannot be
used while the power supply is operating in CC mode, since OCP would disable the output. The OCP
command is enabled by a logic "1" and disabled by a logic "0". For example, to enable a channel for overcurrent
protection. Enter:
OCP 1
to disable a channel from OCP, Enter:
OCP 0
5.5.6 OTHER COMMON COMMANDS
This section will review two commands not presented in previous sections. The two commands to be discussed are
RANGE and TRACK. Both of these commands may be controlled by a true "1" or false "0" command. The
"RANGE" command is only applicable to the PPS-1326, "TRACK" command is only applicable to the PPS-2322.
The ensuing examples will assist in clarifying the two commands.
To set the tracking mode in the PPS-2322, send:
OUTPUT 522; TRACK 1
Refer to section 4.7 for more information on the PPS-2322 tracking mode.
To set the "High" range on the PPS-1326 series, send:
OUTPUT 516; RANGE 1
To set the "Low" range on the PPS-1326, send:
OUTPUT 516; RANGE 0
Refer to section 4.8 for more information on the dual ranges of the PPS-1326.
5.6 FUNDAMENTALS OF PROGRAMMING
The following section explains fundamental operations of programming the supply in remote mode. Before
beginning operation, have your system completely installed and set up accepted, do not have a load applied at the
outputs. Be aware at all times of power supply's voltage and current limits. If data greater than the range of the
power supply is programmed, data is disregarded and a range error occurs. Due to the extent of programming
languages available, only common programming commands will be discussed.
ADDRESS SELECTION: The first step involved in remote programming is to select the power supply's address.
The present power supply address may be viewed via the front panel address key or in the Default Conditions List.
To alter this address, press the address key, select a new address (0-30) and press "ENTER" key. The data is stored
in an EEPROM.
In order to have an effective communication path, the DMA channel of the GPIB controller card and address of
the power supply must be linked. For example, if the DMA channel in the computer is 5 (AT-GPIB board 0