Instruction Manual

25
a) P30 sets the voltage and Percent Full that will cause the relay to go ON.
b) P31 sets the voltage and Percent Full that causes the relay to go OFF.
c) If the ON voltage is higher than the OFF voltage, then the relay will go ON when the voltage is
above the high voltage, and OFF when it is below the low setting. If you want the relay to work
in the opposite sense, then put the ON voltage below the OFF voltage.
d)If the “BATT%FULL” settings in are disabled (with display unit: by setting the P30 and P31
BATT%FULL to 0), then “in between” the voltage settings the relay will not change its state.
e) if the “BATT%FULL” settings are specified (not zero), then in between the voltage settings the
value of “BATT%FULL” will also change the relay state.
f) The “BATT%FULL” settings follow the expected logic of the “voltage” settings: so if the relay
goes ON at high voltage, and OFF at low voltage, then the relay goes ON at high
“BATT%FULL” , and goes OFF at low BATT%FULL. (This is just for illustration, but more
commonly ON will be set to the lower voltage.)
g) Important: In addition: when the BATT%FULL setting is set to 100%, instead of responding
when the actual “%full” (AD22) reading reaches 100, the relay will respond when Battery #1
reaches the “charged “ criteria as defined by the settings in program number P32.
The voltage command is always dominant: so in case the BATT%FULL setting specifies “go on”
and the voltage setting specifies “go off”, the voltage will always govern.
If you want only the VOLTS to control the relay, disable the Batt1%Full settings. You can disable
either or both %FUL settings by entering “0”. (When you do this in the “Display Unit” you will see that
“N/A” will be shown.)
If you want only the Batt1%Full to control the relay, put the VOLTS setpoints at an extreme HIGH
or LOW, such that the actual battery voltage can never reach it—but be sure to put the correct one
HIGH and LOW so the relay will change the way that you want as described in item f) above. Also, for
version 2.0 or greater, when this is set to 100%, the relay will ignore the actual “%full” reading, and
will only respond when the battery reaches “full charged” as defined in program P32.
Example1, Relay goes ON when voltage low, OFF when high: If you wish the relay to go ON below
24.5 volts and OFF above 27 volts, and not be affected by Batt1% full then program as follows
P30: (RELAY ON settings) 24.5V, Batt%=0, or disable Batt% ON.
P31:(RelayOff setings) 27.0V, Batt%=0, or disable Batt% OFF.
Example2, Relay goes OFF when voltage low, ON when high: If you wish the relay to go OFF
below 24.5 volts and ON above 27 volts, and not be affected by Batt1% full then program as follows
P30: RelayOn 27.0V, Batt%=0 or disable Batt% ON.
P31: RelayOff 24.5V, Batt%=0 or disable Batt% OFF..
In either case the relay will not change when in between these voltages.
Example3, Relay goes ON when Batt% low, OFF when high: If you wish the relay to go ON below
50%, and OFF above 80%, then program as follows (for a 24 V system):
P30: RelayOn 10.0V, Batt%=50
P31: RelayOff 35.0V, Batt%=80.
Example4, Relay goes OFF when Batt% low, ON when high: If you wish the relay to go OFF below
50%, and ON above 80%, then program the voltage “out of range” as follows (for a 24 V system):
P30: RelayOn 35.0V, Batt%=80
P31: RelayOff 10.0V, Batt%=50.
Example5, Make relay go ON when Batt% less then 50% or Batt Volts less than 22.4, and OFF
when Batt% is above 80% or BattV greater than 28.8
P30 RelayOn: = 22.4V, Batt%=50, :,