Understanding the WatchMon - Control Logic - Discharging settings

Technician admin screen for the WatchMon supervisor hardware to configure the discharging control logic.

Navigate to the screen via the  Control Logic option on the Menu then choosing the Discharging tab. Editing only available when in Technician mode.

Objective

1. Adjust the control parameter to suit the ESS application.
2. Save
3. Monitor using the telemetry and chart screens.

Field Definitions 

Discharging- Overall State: Depending on state will engage or disengage the relay (and/or communicate with the remote charger equipment). The thresholds are the operating parameters used for the battery.

• ON  
• OFF 
• LIMP (Limited Power)
• ON transitioning to OFF - The state is currently ON however the rules will switch OFF if the state continues for threshold stop period.
• OFF transitioning to ON - The state is currently OFF however the rules will switch ON if the elapsed restart interval has occurred.

Discharging - Operating Mode:

• Auto:  Will adopt the state calculated based on thresholds specified.
• ManualOn:  Will for the system state ON.
• ManualOff:  Will force the system state OFF.

Allow Limited: Will enable the limited power mode of operation to ensure limited discharging mode when cells are in a low state of charge (SoC%) or voltage threshold.

Cell Low Cutout (CV3):  Cell voltage that if below will stop the discharging process state, when monitoring is enabled.

Cell Low Resume (CV4):  Cell voltage that if above will resume / restart the discharging process state, when monitoring is enabled.

Limited Power Cell Volt (CV6): Cell voltage that when below will put the system is into limited power mode, hence remove non critical loads or run in limp mode for discharge, only available with Limited Power enabled. 

Low Cell Celcius (CT2): Cell temperature threshold that is OK to operate, if below will stop the discharging state when monitoring is enabled.

Hi Cell Celcius (CT7): Cell temperature threshold that is OK to operate, if above will stop the discharging state when monitoring is enabled.

Low Ambient (BT2): WatchMon supervisor temperature threshold that is OK to operate, if below will stop the discharging state when monitoring is enabled.

Hi Ambient (BT7): WatchMon supervisor temperature threshold that is OK to operate, if above will stop the discharging state when monitoring is enabled.

Delay transition - Stop: Ensures that the state change from ON to OFF must exceed beyond the period specified in seconds.

Delay transition - Restart: Ensures that the state change from OFF to ON must exceed beyond the period specified in seconds.

Shunt Low Cutout (QV2):    Shunt voltage that if below will stop the discharging process state, when monitoring is enabled.

Shunt Low Resume (QV3):   Shunt voltage that if above will resume / restart the discharging process state, when monitoring is enabled.

Limited Power Shunt Volt (QV5):   Shunt voltage that when below will put the system is into limited power mode, hence remove non critical loads or run in limp mode for discharge, only available with limited power enabled. 

SoC% Low Cutout (QC1):  Shunt state of charge (SoC%) threshold that if below will stop the discharging process state, when monitoring is enabled.

SoC% Low Resume (QC7):   Shunt state of charge (SoC%) threshold that if above will resume / restart the discharging process state, when monitoring is enabled.

Supply Low Cutout (BS2):  WatchMon supply voltage that if below will stop the discharging process state, when monitoring is enabled.

Supply Low Resume (BS3):  WatchMon supply voltage that if above will resume / restart the discharging process state, when monitoring is enabled.

Status RX: Flashes as status telemetry is received (hover over will display time received).

Setup RX: Flashes when setup configuration is received (hover over will display time received).

Action button / process link events

Edit: This button opens up fields to editing, only available when in Technician mode.

Undo:  Restores values to last saved values and returns to read only mode.

Save:  Saves values into system and returns to read only mode.  This only works when connected by a USB.  If saving whilst connected via WiFi the following Error message appears.

Default:  Restore values to default for Discharging control logic.

Pressing the  Edit button will make the options UNDO - SAVE and DEFAULT buttons available.