Maxim Integrated 78M6631 - Manual (Page 24)

78M6631 Firmware Description Document UG_6631_078
24 Rev 2
5.4 Parameters Configuration
These registers are defined as input registers. The values of the input registers can be updated by the
user at run-time. A flash update routine is provided to save the values of various registers as default
(check the Flash Stored column in the following tables).
Save Input Register Values to Flash Memory
To save the register values to flash memory, it is necessary to write the following value to the Command
Register: 0x5920008. Once saved, the latest saved values will become the new defaults.
5.4.1 Scaling
Input
Register
CLI
Address
(Hex)
SPI
Address
(Hex)
Scaling Notes
Flash
Stored
Default
Iscale 101 404 Scaling for RMS currents unsigned Y 50000
Vscale 100 400 Scaling for RMS voltages unsigned Y 667000
Pscale 102 408 Scaling for Power results unsigned Y 33350000
PFscale 117 45C Scaling for Power Factor unsigned Y 1000
Fscale 107 41C Scaling for Frequency unsigned Y 1000
Tscale 108 420 Scaling for Temperature unsigned Y 1000
5.4.2 Alarms Limit Setting
Input
Register
CLI
Address
(Hex)
SPI
Address
(Hex)
Alarm Limits
(Note: 0* disables item)
Notes
Flash
Stored
Default
IrmsMax 10A 428 Maximum RMS current/phase unsigned Y 0
VrmsMax 10C 430 Maximum RMS voltage/phase unsigned Y 0
IrmsMin 109 424 Minimum RMS current/phase unsigned Y 0
VrmsMin 10B 42C Minimum RMS voltage/phase unsigned Y 0
PFmin 10E 438 Minimum Power Factor/phase unsigned Y 0
Tmin 10F 43C Minimum Temperature Y 0
Tmax 110 440 Maximum Temperature Y 0
VmaxDelta 10D 434
Maximum line-to-line Voltage
Imbalance
unsigned
Y 0
5.4.3 Phase Error Compensation
Input
Register
CLI
Address
(Hex)
SPI
Address
(Hex)
Phase Compensation Notes
Flash
Stored
Default
PcompA 104 410 Phase compensation A signed Y 0
PcompB 105 414 Phase compensation B signed Y 0
PcompC 106 418 Phase compensation C signed Y 0