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Operation
23.
If the output phases are jumpered together as in Figure 3-2, the master must be
placed in parallel mode through the SCPI system or through the menu system
before the output key is pressed.
24.
The TW units are now all controlled via the master SCPI or front panel in the
usual manner. The maximum values calculated by the master will reflect the
raised VA of the paralleled system by allowing larger current limits to be
specified at current program time.
3 .1 1 .3
R E T U R N T O S T ANDAL ONE OP E R AT I ON
To return the TW system to standalone mode:
1. Power down all connected units
2. Remove Master/Slave cables. The steel housings may remain on the back of the
slave TW units, if they were originally installed.
3. Disconnect any bussed power wiring from the TW outputs.
4. Power up TW units.
5. If the message "Rcl Curr High" appears on the display of any of the units, this is
merely to notify the user that the previously legal current setpoint cannot apply in a
standalone use. The current is automatically set to 5 Amps at this time.
6. If a unit was previously a slave: In SCPI set:
SYST:CHAIN 0
7. If a unit was previously the master: In SCPI set:
SYST:CHASSIS 1
8. The units will self reboot and return as individual TW configured units.
3-28
TW 3700 • TW 5550
Elgar TrueWave
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