42
OPERA
TION
5. Computer Controlled Operation
Using the 6530 with a personal computer (PC) enables the unit to perform at its full capacity.
5.1
ABOUT THE GPIB INTERFACE
Magtrol prefers the GPIB (General Purpose Interface Bus)/IEEE-488 Standard for computer-to-
instrument interfacing because:
•
The GPIB parallel interface is faster than serial interfaces.
•
The GPIB enables testers to access up to 15 instruments on one port. Because typical motor
testing requires that at least five separate parameters be synchronized, a system of easy, fast
access to more than one instrument is essential.
•
The GPIB has rigid data formatting and hardware standards. These standards help to ensure
that all functions will work properly when the hardware and software are installed.
Note:
The GPIB interface is not standard on most personal computers.
An interface card and driver software must be installed. An IEEE-
488 cable must also be installed between the computer and the
6530. Magtrol recommends National Instruments Corporation
hardware and software.
5.1.1
I
NSTALLING
THE
GPIB/IEEE-488 C
ONNECTOR
C
ABLE
C
AUTION
:
M
AKE
SURE
BOTH
THE
COMPUTER
AND
6530
ARE
TURNED
OFF
BEFORE
INSTALLING
THE
GPIB
CONNECTOR
CABLE
.
1. Connect one end of a high-quality, double-shielded cable to the 6530 GPIB connector.
2. Connect the other end to the GPIB interface in your PC.
PC
Magtrol
Test and
Measurement
Software
A
N
A
L
O
G
O
U
T
P
U
T
A
±
±
V
±
V
±
V
±±
±
±
A
V
A
±
EXT.
SYNC.
EARTH
GROUND
20VA 50/60Hz
FUSE (5x20mm)
CAUTION: DOUBLE POLE FUSING
120V UL/CSA 250mA 250V SB
240V IEC 160mA 250V T
RS-232C
GPIB/IEEE-488
MAGTROL INC.
20 A
AMPS
750 V
VOLTS
MAX.
EXT.
MAX.
1000 V
MAX.
MAX.
±10 V
SENSOR
20 A
AMPS
750 V
VOLTS
MAX.
EXT.
MAX.
1000 V
MAX.
MAX.
±10 V
SENSOR
20 A
AMPS
750 V
VOLTS
MAX.
EXT.
MAX.
1000 V
MAX.
MAX.
±10 V
SENSOR
Figure 5–1 GPIB Installation
5.1.2
C
HANGING
THE
GPIB P
RIMARY
A
DDRESS
Each instrument serviced by the GPIB has its own primary address code, which enables the computer
to obtain readings from the instrument. The factory default of the GPIB address on the 6530 is 14.