aci eRCM Express, Руководство пользователя

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mCore Firmware Ver 01.10 Ver 2019-Oct-29 Page 52 of 97
eRCM™ Express Quick READ List
AB Tag Register Units Description/Use Common Tag Name
ACI_Control[0]
40275 #
Returns a one (1) that indicates if the eRCM Express
computational engine is currently busy doing calculations. A
zero (0) indicates that it is safe to poll for information as
calculations are complete.
KrnlBusy
ACI_Control[1]
40277 #
Returns a unique number (from 0 to 6 million) that changes
every time new operating conditions are processed by eRCM
Express. Helps PLC determine if the full loop of
communication/calculations is being implemented.
WDPulse
ACI_Control[2]
40279 #
Relative to Current Operating Conditions and Current Load
Step, this register contains the Next Safe Up (increased load).
If there is no safe load step with higher load, then a -1 is
returned.
NextLSUp
ACI_Control[3]
40281 #
Relative to Current Operating Conditions and Current Load
Step, this register contains the Next Safe Down (decreased
load). If there is no safe load step with lower load, then a -1 is
returned.
NextLSDown
ACI_Control[4]
40283 %
Returns the percent of load change from Current Load Step to
Next Step Up, relative to maximum allowed load at the current
speed. If there is no safe load step up, then this function
returns 999999 as the percent change.
NSU_Perc
ACI_Control[5]
40285 %
Returns the percent of load change from Current Load Step to
Next Step Down, relative to maximum allowed load at the
current speed. If there is no safe load step down, then this
function returns 999999 as the percent change.
NSD_Perc
ACI_Control[6]
40287 Rpm
For the Current Load Step, returns the lowest speed (rpm) for
which unit can be adjusted without causing safety issues.
MinRPM
ACI_Control[7]
40289 Rpm
For the Current Load Step, returns the highest speed (rpm) for
which unit can be adjusted without causing safety issues.
MaxRPM
ACI_Control[8]
40291 psiG
For the Current Load Step, returns the lowest suction pressure
(psiG) for which unit can be adjusted without causing safety
issues.
MinPs1
ACI_Control[9]
40293 psiG
For the Current Load Step, returns the highest suction
pressure (psiG) for which unit can be adjusted without causing
safety issues.
MaxPs1
ACI_Control[10]
40295 #
Returns the ideal Load Step to which to load, to fully load the
unit. This is for reference only as the unit's/PLC's goals may
not always be to maximize unit's load. Additionally, this register
returns a value of -1 if all load steps are invalid.
OptimalLS
ACI_Control[11]
40297 %
For the Current Load Step, returns the Current Torque (%),
which is the percent of Required Power relative to Driver’s
Derated Power.
CurrTorq
ACI_Control[12]
40299 %
Returns unit's efficiency (measure of how efficient the
compressor is at current operating point).
IsenEff
ACI_Control[13]
40301 scf/hr
Returns fuel rate based on current load and current speed,
only if modeled in the eRCM Viewer model. Otherwise, returns
0.
FuelRate
NOTE : If NextLSUp = -1 and NextLSDown = -1 and OptimalLS = -1, then there are NO SAFE LOAD STEPS,
and hence unit should Shut Down.
NOTE : If NextLSUp = -1 and NextLSDown = -1 and ErrorArray(CurrLS)
≠
0, then the current load step is
unsafe, and there are no safe loads obtainable (too far away), and hence unit should Shut Down.