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SCADA FEATURES
Flow Calculator Data
Flow Calculator Data may be read from Registers 40080 - 40092. See Pages 23 - 24.
The Forcing of the Lead Pump Position may be accomplished by writing a 1,2,3 or 4 to Register 40022. To return to
normal alternation, write a zero to the register. Setting Register 40022 does not guarantee that the pump selected will
be lead. If the pump selected as lead is disabled (by a pump disable discrete input), then the next available pump will be
made lead. A lead pump selector switch connected to discrete inputs, programmed as sequence inputs, will also over-
ride what is written to Register 40022. The setting may also be changed at Parameter P.39. The content of Register
40022 is saved in non-volatile memory. The current lead pump position may be read from Register 40023.
Forcing Lead Pump Position
Remote Control of Relays
Relays that are not needed for pump control or alarm outputs, may be controlled remotely by setting their Output Func-
tion (Parameters F.31 - 36) to 2.
Remote control is accomplished by setting or clearing Coils 25 - 30 in Register 40002.
Upon a loss of serial communication, Coils 25 - 30 will automatically be cleared after the delay set on Parameter P.38.
For this feature to work properly, the master must poll the Controller at intervals shorter than the time set on Parameter
P.38. However, if Parameter P.38 is set on 255 the relays will remain as commanded, until power is lost.
The HI Relay operates differently from the others. It has a normally closed contact, with the logic inverted. Setting Coil
25 in Register 40002 de-energizes the HI Relay closing the contact. When power is lost to the Controller the HI Relay
contact will close.
Setting Speed of Pumps Forced On
To control the Speed of Pumps that are Forced On, write the desired speed in percent to Register 40046. The new
value will be stored in non-volatile EEPROM memory. The default speed is 100%. The setting may also be viewed or
changed at Parameter P.48.
To force Pump Alternation, momentarily set Coil 136 in Register 40009. When alternation is to be regularly performed
through the SCADA system, automatic alternation should be disabled by setting Parameter P.18 to equal 2.
Forcing Pump Alternation
Forcing a Pump On
To Force a Pump On set Coil 17, 18, 19, or 20 in Register 40002. To return the pump to normal operation, clear the
respective Coil.
Upon a loss of serial communication, the Force Pump On Logic will be automatically reset, and any pump that had been
remotely forced on will be turned off after the delay set on Parameter P.38. For this feature to work properly, the master
must poll the Controller at intervals shorter than the time set on Parameter P.38. However, if Parameter P.38 is set on
255 the pumps will remain on until power is lost.
Flush Cycle
To Start Flush Cycle, momentarily set Coil 139 in Register 40009.
To Stop Flush Cycle, momentarily set Coil 140 in Register 40009.
Flush Cycle Active / Inactive status may be read from Coil 141 in Register 40009.
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