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E6198B Switch/Load Unit User Manual
The only difference between OAR and Reset is OAR leaves the state of
"Manual" the same. "Reset" clears the "Manual" setting.
Not Used Base + 3
h
Register offset 3
used only for a placeholder to make software
h
addressing simpler.
Abus control and protection bypass relay (W) Base + 4
Pin card Abus and protection bypass relay control register. All
relay control registers are positive-true logic: writing 0 opens
the relay and writing 1 closes the relay.
Bits
7
Write
PB
PB
4
• Writing to PB
-PB
4
• Writing to AB
-AB
4
manual bit is set to 1, sets state of Abus disconnect relays.
• Writing to AB
-AB
4
is set to 0, does not change the state of the disconnect relays.
When the manual bit is set to 0, writing to this register puts new relay
settings into a "on board" latch. These settings have no impact on the
state of the disconnect relays as long as the "manual" bit is set to 0.
However if the manual bit is set back to 1, the disconnect relay state
written to this register will immediately be invoked, resulting in a
immediate change in the state of the disconnect relays.
Not Used Base + 5
h
Register offset 5
used only for a placeholder to make software
h
addressing simpler.
6
5
4
3
PB
PB
AB
3
2
1
4
sets state of protection bypass relays.
1
, when the Status/Control register
1
, when Status/Control register manual bit
1
B
Register Definitions
h
2
1
0
AB
AB
AB
3
2
1
B-59
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