KEPCO BIT 4886 QUICK START GUIDE

QUICK START GUIDE

KEPCO

An ISO 9001 Company.

BIT

4886

BIT 4886

DIGITAL INTERFACE CARD

I — INTRODUCTION

SCOPE OF MANUAL. This Quick Start Guide covers

the installation, checkout and operation of the Kepco BIT
4886 Card installed in a BOP power supply. Full specifica­tions and operating procedures are listed in the Operator
Manual that can be downloaded from the Kepco web site:

• www.kepcopower.com/support/opmanls.htm#bit

II — INSTALLATION

CAUTION: If the BIT card was not pre-installed in a
BOP at Kepco, you must install and calibrate the card
by following the instructions in the Operator Manual
which can be downloaded from the Kepco website (see
above). Failure to calibrate the unit could impact the
accuracy of settings and readbacks. It will not impact
remote operation of the unit.

STARTUP DEFAULT. The Device Address (GPIB address) for the interface card is set by means of DIP switch S1, positions 1 through 5 (Figure 1) which can be accessed through the top cover of the BOP. It is factory preset to address 6. If a different Device Address is required in your system, there are 31 (1-31) possible choices (see Table 1).

FIGURE 1. SETTING THE GPIB ADDRESS

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Data subject to change without notice 228-1693 REV 1

DESCRIPTION. The Kepco BIT Card Series were designed as an accessory for the Kepco BOP series bipo­lar power supplies. The BIT 4886 card acts as an interface between the digital data bus and the BOP, accepting the digital input data and converting it to an analog signal, which in turn, controls the BOP output.

TABLE 1. DEVICE ADDRESS SELECTION

DECIMAL

ADDRESS

1 00001

2 00010

3 00011

4 00100

5 00101

6 00110

7 00111

8 01000

9 01001

10 01010

11 01011

12 01100

13 01101

14 01110

15 01111

16 10000

17 10001

18 10010

19 10011

20 10100

21 10101

22 10110

23 10111

24 11000

SELECTOR SWITCH S1 SECTION (SIGNAL

LINE)

A5 A4 A3 A2 A1

TABLE 1. DEVICE ADDRESS SELECTION (CONT)

DECIMAL

ADDRESS

25 11001

26 11010

27 11011

28 11100

29 11101

30 11110

31 11111

NOTE:
0 = CLOSED (ON) (Towards printed circuit board)
1 = OPEN (OFF) (Away from printed circuit board)

SELECTOR SWITCH S1 SECTION (SIGNAL

LINE)

A5 A4 A3 A2 A1

CHECKOUT PROCEDURE.

1. Connect the BOP-BIT 4886 Interface Card to either:
a) the GPIB bus using a standard GPIB cable

connected to the BIT 4886 24-pin GPIB connector
(J1) or

b) to an external RS-232 controller with a DB9

type connector (male pins) by connecting the RJ45
patch cord to the BIT 4886 RS 232 port (J2), then
using the RJ45 to DB9 adapter supplied (see Figure

2) to connect the RJ45 patch cord to the external con­troller. On the RJ45 patch cord, the 6-pin connector
plugs into the BIT 4886 RS 232 port, and the 8-pin
connector plugs into the RJ45 to DB9 adapter (see
Table 2 and Figure 2).

TABLE 2. RJ45 TO DB9 ADAPTER WIRE FUNCTIONS

Wire DB9 Pin Purpose

Green 5 Return for pins 2 and 3.

Brown 3

Yellow 2

Carries data from the Kepco power
supply to the controller.

Carries data from the controller to the
Kepco power supply.

2. Apply power to BOP power supply. The BOP-BIT
4886 will beep for less than 1 second, then will be
ready for use.

3. Send the *IDN? query via either the GPIB or RS 232
port.

Assuming the BIT 4886 card is installed in a BOP 72-6
as an example, verify that the unit responds with
KEPCO,BIT488-6 72-6,A38621 11/10/98,1.81-1.81.

If the unit responds with KEPCO,BIT488-6 200-
20,A38621 10/01/98,1.81-1.81, it means that the card
was not initialized; refer to Operator Manual to initial­ize the card. Note that date 10/01/98 is the initial cali­bration date performed at the factory and indicates the
card has never been calibrated by the user.

4. Send VOLT? Verify that unit responds with 0 (indicat­ing voltage is set to 0, the power-up condition).

5. Send OUTPUT ON;VOLT MAX. Verify that the BOP
power supply provides maximum output voltage (e.g.,
72V d-c. for BOP 72-6).

6. Send FUNC:MODE CURR. Verify that BOP front panel
current LED lights.

7. Send FUNC:MODE VOLT. Verify that BOP front panel
voltage LED lights.

8. Send *TST? and verify response is 0. This verifies the
bit 4886 microprocessor is operating correctly.

FIGURE 2. RJ45 TO DB9 ADAPTER WIRING

9. With no load connected, send DIAG:TST? and verify
response is 0. CAUTION: This test swings the output
to Volt MAx and Volt Min at full power. If a Load is
connected, damage to the load may occur, or the test
may fail due to the load effect on unit output voltage

III — OPERATION

The BOP can now be controlled via either the RS 232 or
GPIB ports using IEEE 488 and SCPI commands. The
applicable commands and queries are listed in Table 3
and 4, respectively. For a full description of all commands

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as well as remote programming information, refer to the
BIT 4886 Operator Manual listed on page 1 of this guide.

TABLE 3. IEEE 488.2 COMMANDS/QUERIES

COMMAND Function

*CLS Clear Status Command - clears status data.

*ESE, ? Standard Event Status Enable Command pro-

grams Standard Event Status Enable register,
Query returns register mask.

*ESR? Event Status Register Query returns register con-

tents, then clears register.

*IDN? Identification Query returns identification charac-

ter string.

*OPC, ? Operation Complete Command causes power sup-

ply to set status bit 0 (Operation Complete) when
pending operations are complete When Query
returns “1” operations are complete.

*OPT? Options Query lists option functionality.

*RCL Recall Command restores power supply to previ-

ously saved settings.

*RST Rest Command resets power supply to power on

default state.

*SAV Save Command saves present power supply set-

tings for later recall.

*SRE, ? Service Request Enable Command sets the condi-

tion of Service Request Enable register. Query
reads register.

*STB Status Byte Register Query reads Status Byte

Register without clearing it.

*TRG Trigger Command triggers power supply to prepro-

grammed values of output current and voltage.

*TST? Self Test Query Initiates power supply self test.

*WAI Wait-To-Continue Command requires completion

of previously issued commands and queries before
continuing.

TABLE 4. SCPI COMMANDS/QUERIES

COMMAND Function

INIT[:IMM] INITiate[:IMMediate] Command enables a single

trigger.

INIT:CONT, ? INITiate:CONTinuous Command enables/disables

MEAS:CURR? MEASure[:SCALar]:CURRent[:DC]? Query mea-

MEAS:VOLT? MEASure[:SCALar]:VOLTage[:DC]? Query mea-

OUTP, ? OUTPut[:STATe] Command enables (1 or ON) or

FUNC:MODE, ? [SOURce:]FUNCtion:MODE Command estab-

FUNC:MODE

:TRIG, ?

LIST:CLE [SOURce:]LIST:CLEar Command Clears all list

LIST:COUN, ? SOURce:]LIST:COUNt Command establishes how

LIST:COUN

:SKIP

LIST:CURR, ? SOURce:]LIST:CURRent Command adds current

LIST:CURR

:POIN?

LIST:DIR, ? [SOURce:]LIST:DIRection Command establishes

LIST:DWEL, ? [SOURce:]LIST:DWELl Command determines how

LIST:DWEL

:POIN?

LIST:GEN, ? [SOURce:]LIST:GENeration Command establishes

LIST:QUER, ? [SOURce:]LIST:QUERy Command determines first

LIST:MODE, ? [SOURce:]LIST:MODE Command determines

LIST:SEQ, ? [SOURce:]LIST:SEQuence Command determines

continuous triggers; query shows trigger enabled/
disabled status.

sures actual current.

sures actual voltage.

disables (0 or OFF) the power supply output.
Query shows if output is on (1) or off (0).

lishes operating mode of power supply VOLT =
voltage, CURR = current. Query shows mode.

[SOURce:]FUNCtion:MODE:TRIGger establishes
operating mode of power supply when TRIGger
command is sent. Query returns mode pro­grammed.

entries by setting all pointers to 0.

many times the list is executed. Query shows pro­grammed setting.

[SOURce:]LIST:COUNt:SKIP Command allows
beginning steps of list-generated waveform to be
run once, then ignored. Query shows how many
steps to skip after the first time.

value (in Amps) to list. Query identifies parameters
(main channel) entered for list.

[SOURce:]LIST:CURRent:POINts? Query identi­fies the total number of points in a list and next
location to be filled.

which direction to run list. Query shows pro­grammed direction.

long the main channel parameters will be active.
Query shows programmed dwell times.

[SOURce:]LIST:DWELl:POINts? Query identifies
number of locations with dwell times.

the order for executing the list. Query shows selec­tion of either default or user sequence.

location to be queried by LIST:SEQ?; Query shows
programmed location.

dwell time resolution SLOW (default) or FAST.
Query shows mode.

execution order for list data points (not recom­mended for new designs). Query shows user exe­cution sequence for list.

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TABLE 4. SCPI COMMANDS/QUERIES (CONT)

COMMAND Function

LIST:VOLT, ? SOURce:]LIST:VOLTage Command adds voltage

LIST:VOLT

:POIN?

CURR, ? SOURce:]CURRent[:LEVel][:IMMediate][:AMPli-

CURR:MODE, ? SOURce:]CURRent:MODe Command allows user

CURR:RANG, ? [SOURce:]CURRent:[:LEVel]RANGe Command

CURR:RANG

:AUTO

CURR:TRIG, ? SOURce:]CURRent[:LEVel]TRIGgered[:AMPli-

VOLT, ? [SOURce:]VOLTage[:LEVel][:IMMediate][:AMPli-

VOLT:MODE SOURce:]VOLTage:MODE Command allows user

VOLT:RANG, ? [SOURce:]VOLTage[:LEVel]:RANGe Command

VOLT:RANG

:AUTO

VOLT:TRIG, ? SOURce:]VOLTage[:LEVel]TRIGgered[:AMPli-

STAT:OPER

:COND?

STAT:OPER

:ENAB

STAT:OPER? STATus:OPERation[:EVENt] Query returns the

STAT:PRES STATus:PRESet Command disables reporting of

STAT:QUES? STATus:QUEStionable[:EVENt]? Query returns

STAT:QUES

:COND?

value (in Volts) to list. Query identifies parameters
(main channel) entered for list.

SOURce:]LIST:VOLTage:POINts? Query identifies
total number of points in a list.

tude] Command programs output current (actual
current depends on load). Query shows pro­grammed current or maximum/minimum current
allowed.

to execute (LIST) or stop (FIX) a list, or to execute
a transient (TRAN). Query identifies active current
mode.

sets output current range, 1 = full scale, 4 = 1/4
scale. Query shows programmed current range.

[SOURce:]CURRent:[:LEVel]RANGe:AUTO Com­mand sets current range to automatic.

tude] Command programs current value of trigger.
Query shows programmed value.

tude] Command programs output voltage (actual
voltage depends on load). Query returns pro­grammed value.

to execute (LIST) or stop (FIX) a list, or to execute
a transient (TRAN). Query identifies active voltage
mode.

sets output voltage range, 1 = full scale, 4 = 1/4
scale. Query shows programmed voltage range.

[SOURce:]VOLTage:[:LEVel]RANGe:AUTO Com­mand sets voltage range to automatic.

tude] Command programs voltage value of trigger.
Query shows programmed value.

STATus:OPERation:CONDition Query returns
value of the Operation Condition Register.

STATus:OPERation:ENABle Command sets Oper­ation Enable Register mask. Query reads register.

value of the Operation Event register.

all status events.

value of Questionable Event register.

STATus:QUEStionable:CONDition? Query returns
value of Questionable Condition Register.

TABLE 4. SCPI COMMANDS/QUERIES (CONT)

COMMAND Function

STAT:QUES

:ENAB, ?

SYST:BEEP SYSTem:BEEP Command causes the unit to emit

SYST:COMM

:SER:ECHO, ?

SYST:COMM

:SER:PACE, ?

SYST:ERR? SYSTem:ERRor? Query posts error messages to

SYST:ERR

:CODE?

SYST:ERR

:CODE:ALL?

SYST:PASS

:CEN

SYST:PASS

:CDIS

SYST:PASS

:NEW

SYST:PASS

:STAT?

SYST:REM, SYSTem:REMote Command sets unit to remote (1

SYST:SEC:IMM SYSTem:SECurity:IMMediate Command initial-

SYST:SET, ? SYSTem:SET Command establishes Device

SYST:VERS? SYSTem:VERSion? Query identifies SCPI Version

STATus:QUEStionable:ENABle Command pro­grams Questionable Condition Enable register.
Query reads register.

a brief audible tone.

SYSTem:COMMunication:SERial:ECHO Com­mand enables (ON) or disables (OFF) echo mode.
Query indicates if echo is on or off.

SYSTem:COMMunication:SERial:PACE Com­mand enables (XON) or disables (NONE) data flow
control via the serial interface. Query shows
enabled or disabled.

the output queue.

SYSTem:ERRor:CODE? Query returns 3-charac­ter error code without the ASCII definition string.

SYSTem:ERRor:CODE:ALL? Query returns a
comma-separated list of all error codes.

SYSTem:PASSword:CENable Command Sets
password enable if password matches.

SYSTem:PASSword:CDISable Command disables
password access if password matches.

SYSTem:PASSword:NEW Command establishes
new password.

SYSTem:PASSword:STATe? Query shows pass­word state: enabled (1) or disabled (0).

or ON) or local (0 or OFF) mode if using RS 232.
Query shows programmed mode.

izes all NVRAM variables to factory defaults.

Clear, Line Feed, and Reset functions. Query
shows programmed functions.

implemented.

KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL [phone] " FAX [phone]

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