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SECTION 4
GPIB
Interface
4.7
GPIB OPERATING CONSIDERATIONS
Before connecting
or disconnecting
GPIB cables, be sure
to turn off the instrument. When other equipment is con-
nected to the bus, turn off that equipment also.
l
When using the GPIB, make sure all equipment
con-
nected
to the bus is turned on.
l
Exercise care for delimiters.
If the same delimiters are
not used, the bus could hang up.
l
Up to 15 units (including
the controller)
can be con-
nected to the GPIB bus at one time.
l
Cable length restriction:
Total transmission
path length = 2m x (no. of units) or
20m (whichever
is shorter). Maximum
length of one
cable = 4m.
l
The GPIB is intended
to be used in an environment
that is not subjected to excessive electrical noise.
4.8
GPIB ERRORS
When an error occurs during GPIB bus operation, an er-
ror message (see Table 4-10) is displayed
and the com-
mand string is ignored. After analyzing a displayed GPIB
error, it can be cleared by pressing any front panel key or
by sending a device clear command over the bus.
Table 4-10. GPIB Error Messages
Err12
The entered parameter value exceeds the rated range
Err13
Display assi nment error
While r$ A
DISPLAY in AUTO, an item of m
DISPLAY is assigned, CKT is assigned, or
deviation display is assigned.
Err14
Illegal request for DC bias
While m
DISPLAY in AUTO, L, R or I Z I, you attempted to turn on DC bias.
Err15
Function parameter assignment
error.
With the Z function selected, you attempted to select the Q, D, ESR or G parameter.
With the L or C function selected, you attempted to select the 8 (deg) parameter.
Err16
Equivalent
circuit assignment
error.
With the ESR parameter selected, you attempted to select the parallel equivalent
circuit
(PAR).
With the G parameter selected, you attempted to select the series equivalent
circuit (SER).
Err22
Zero correction abnormal
Zero
correction value exceeds the tolerable range.
Err31
Receive buffer over-flow
A program code is too long for the receive buffer. Command string is ignored.
Err32
Illegal header
Receives a header that is not assigned.
Err33
Illegal header
Though only a setting can be made, an inquiry is made, or though only an inquiry can be
made, a setting is made.
Err34
Illegal parameter
Required parameter missing.
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4-19
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