aci eRCM Express, Manual

Page: 39 / 97

mCore Firmware Ver 01.10 Ver 2019-Oct-29 Page 39 of 97
Reading Data from eRCM Express™:
DIM NextLoadStepUp as Double
…
DIM LoadStepBHPs(23) As Double
Modbus.NumberOfDataValues = 1
Modbus.Address = 40275 // The address of the "IsKernelBusy" register.
// Will return false (0) when eRCM Express has completed
// all of its performance and safety calculations.
// This usually takes less than 150 ms.
Modbus.ReadData() // Read data in the "IsKernelBusy" register.
If Modbus.Data(1) = 0 Then // If 0, then calculations are now complete.
// Do the following to read specific items:
Modbus.NumberOfDataValues = 13 (1 Value = two 16-bit registers)
Modbus.Address = 40277 // Start of a block of data
Modbus.ReadData()
eRCMExpressWatchdogPulse = Modbus.Data(1)
NextLoadStepUp = Modbus.Data(2)
NextLoadStepDown = Modbus.Data(3)
NextLSUpPercentChange = Modbus.Data(4)
NextLSDownPercentChange = Modbus.Data(5)
MinSpeedCurrentLS = Modbus.Data(6)
MaxSpeedCurrentLS = Modbus.Data(7)
MinSuctPressureCurrentLS = Modbus.Data(8)
MaxSuctPressureCurrentLS = Modbus.Data(9)
FindOptimalLoadStep = Modbus.Data(10)
CurrentTorque = Modbus.Data(11)
IsentropicEfficiency = Modbus.Data(12)
FuelRate = Modbus.Data(13)
// Do the following to read an array of values at once:
// Example: Get the load for load steps 1 through 23
Modbus.NumberOfDataValues = 23
Modbus.Address = 40645 // Modbus address for start of LoadArray values (Load Step 1)
Modbus.ReadData()
LoadStepBHPs(1) = Modbus.Data(1) // Load for Load Step 1 (Address 40645)
LoadStepBHPs(2) = Modbus.Data(2) // Load for Load Step 2 (Address 40647)
LoadStepBHPs(3) = Modbus.Data(3) // Load for Load Step 3 (Address 40649)
LoadStepBHPs(4) = Modbus.Data(4) // Load for Load Step 4 (Address 40651)
…
LoadStepBHPs(23) = Modbus.Data(23) // Load for Load Step 23 (Address 40689)
…
END IF