VTI Instruments Corp.
20
VM3608A/3616A Preparation for Use
S
ETTING THE
L
OGICAL
A
DDRESS
The logical address of the VM3608A/3616A is set by a single 8-position DIP switch located near
the module’s backplane connectors (this is the only switch on the module). The switch is labeled
with positions 1 through 8 and with an ON position. A switch pushed toward the ON legend will
signify a logic 1; switches pushed away from the ON legend will signify a logic 0. The switch
located at position 1 is the least significant bit while the switch located at position 8 is the most
significant bit. See Figure 2-1 for examples of setting the logical address switch.
SET TO 4
1
ON
2 3 4 5 6 7 8
SET TO 168
1 2 3 4 5 6 7 8
SET TO 8
1
ON
2 3 4 5 6 7 8
SET TO 255
1
ON
ON
2 3 4 5 6 7 8
1
2
3
4
5
6
7
8
Switch
Position
1
2
4
8
16
32
64
128
Switch
Value
ON
ON
(Dynamic)
F
IGURE
2-1:
L
OGICAL
A
DDRESS
S
WITCH
S
ETTING
E
XAMPLES
The VMIP may contain three separate instruments and will allocate logical addresses as required
by the VXIbus specification (revisions 1.3 and 1.4). The logical address of the instrument is set on
the VMIP carrier. The VMIP logical addresses must be set to an even multiple of 4
unless dynamic
addressing is used
. Switch positions 1 and 2 must always be set to the OFF position. Therefore,
only addresses of 4, 8, 12, 16, ... 252 are allowed. The address switch should be set for one of
these legal addresses and the address for the second instrument (the instrument in the center
position) will automatically be set to the switch set address plus one; while the third instrument
(the instrument in the lowest position) will automatically be set to the switch set address plus two.
If dynamic address configuration is desired, the address switch should be set for a value of 255
(All switches set to ON). Upon power-up, the slot 0 resource manager will assign the first available
logical addresses to each instrument in the VMIP module.
If dynamic address configuration is desired, the address switch should be set for a value of 255.
(All switches set to ON). Upon power-up, the slot 0 resource manager will assign the first available
logical addresses to each instrument in the VMIP module.
An application note is provided at the end of this manual to aid in using secondary addressing if a
GPIB/Slot 0 is being used.
F
RONT
P
ANEL
I
NTERFACE
W
IRING
The 8/16-channel version (VM3608A/3616A-1) will have J201 that contains all signals for this
instrument. The 16/32-channel version (VM3608A/3616A-2) will have J201 and J202 provided,
while the 24/48-channel version (VM3608A/3616A-3) will have J200, J201 and J202. The wiring
for each of these connectors is identical and since each group of 8/16 channels is treated as a
separate instrument, the module will have three Channel 1s, three Channel 2s, three Channel 3s,
etc.
Summary of Contents for VM3608A
Page 2: ...VTI Instruments Corp 2 ...
Page 6: ...VTI Instruments Corp 6 VM3608A 3616A Preface ...
Page 12: ...VTI Instruments Corp 12 VM3608A 3616A Preface ...
Page 18: ...VTI Instruments Corp 18 VM3608A 3616A Introduction ...
Page 134: ...VTI Instruments Corp 134 VM3608A 3616A Command Dictionary ...