aci eRCM Express, Manual

Page: 74 / 97

mCore Firmware Ver 01.10 Ver 2019-Oct-29 Page 74 of 97
FOR N = 1 to eRCM_CECylInfoPerCECylLen
UnitABC.CECylArray(I, N) = Modbus.ReadData(I)
NEXT N
Modbus.Address = Modbus.A 2*eRCM_CECylInfoPerCECylLen
NEXT I
// ----------------------------------
// Act on those results
… Expertise of the automation/control team …
// Compressor Errors for Unit (Compressor and Driver) Errors
// The ErrorArray only returns errors associated with the compressor
// being unsafe. Overloading and/or underloading a driver (engine or motor)
// can lead to issues. Thus, if you want to invalidate load steps based on
// driver issues, the PLC needs to do that.
// Next Step Up, Next Step Down, and OptimalLS are based on compressor safety
// and on over/under loading of driver, and on making sure that load step
// changes are not so larger that the change in load can lead to the engine
// surging and/or shutting down.
// IF need for more load and NSU
≠
-1 THEN Load up to NSU …
// IF need for less load and NSD
≠
-1 THEN Load down to NSD …
// CRITICAL CHECK
// ==============================
// IF NSU=-1 AND NSD=-1 AND ErrorArray(CurrentLS)
≠
0 THEN SHUT DOWN! No safe
load steps!
// ==============================
// Display desired items of interest on various screens…
// =======================================