User Manual 3155
Programming Reference 4-50
Synchronizing
Multiple Instru-
ments
The capability to synchronize multiple instruments is one of the
strongest features of the Model 3155. However, since each instru-
ment is free running and has completely independent settings and
controls, one must first prepare the instruments to a level where all
instruments can unite. See Configuring Actual Slot Location in
Chap-
ter 2
and Multi-Instrument Synchronization Control in the Utility Panel
section of
Chapter 3
for more detail.
There are some simple steps to synchronize instruments however,
three conditions must be met otherwise synchronization will fail, they
are:
1. Synchronized cards must be adjacent to each other, and
2. Master module must be at the left of the clustered instruments
3. The module, which is at the far right side of the cluster, is des-
ignate as “Last slave”.
NOTE
Every cluster of synchronized instruments must have
one master and one last slave. The master module is al-
ways at the left side of the cluster and the last slave is
always at the far right side of the cluster. Any number
from 0 to n modules can be placed between the master
and the slave modules.
After you have your master and slave units in place, you’ll have to
execute a series of commands to prepare the instruments to their fi-
nal lock position. The following example assumes three adjacent in-
struments. As was explained before, the left instrument is called
“master”, the center instrument is called “slave” and the instrument
on the right is called “last slave”. Here is what you do:
1. Program “slave”: inst:coup:mode slav
2. Program “last slave”: inst:coup:mode slav
3. Program “master”: inst:coup on
4. Program “slave”: inst:coup on
5. Program “last slave”: inst:coup on
6. Program “last slave”: inst:coup:set 0
7. Program “slave”: inst:coup:set 1
8. Program “master”: inst:coup:set 1
9. Program “last slave”: inst:coup:set 2
After sending the last command, all instruments are locked together
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