Sensor Electronics SEC Millenium Series Instruction And Operation Manual page 367

Internal Holding
Register Register
Address Address
2900 42901
2901 42902
2902 42903
2903 42904
2904 42905
2905 42906
2906 42907
2907 42908
2908 42909
2909 42910
2910 42911
2917 42918
SEC 3120 16-bit Modbus Manual
For Version 1.2 and above
Function Code 03- Read Unit Register Description
(Data bits and Parameter Specifics)
Bit-mapped Unit Operating Status:
Bit 0: In calibration mode.
Bit 1: In start-up init mode.
Bit 2: Relays and lights under master control.
Bit 3: User operating 3120 display menus.
Bit 4: Reading sensors.
Bit 5: Accessing media.
Bit 6: Saving parameters to NVROM.
Bit 7: B.I.T. operation in progress.
Bit 8: Formatting media.
Bit 9: Setting real time clock.
Bit 10: Low relay engaged.
Bit 11: Mid relay engaged.
Bit 12: High relay engaged.
Bit 13: Fault relay engaged.
Bit 14: One or more relays latched on.
Bit 15: 3120 busy/write protected from changes.
Bit-mapped Fault Relay On Reason Code, Word 1:
Bit 0: Have a fault from sensor 1.
Bit 1: Have a fault from sensor 2.
Bit 2: Have a fault from sensor 3.
Bit 3: Have a fault from sensor 4.
Bit 4: Have a fault from sensor 5.
Bit 5: Have a fault from sensor 6.
Bit 6: Have a fault from sensor 7.
Bit 7: Have a fault from sensor 8.
Bits 8 - 15: Reserved for future sensor channels.
Bit-mapped Fault Relay On Reason Code, Word 2:
Bits 7 - 0: Sensor error code of highest faulting sensor.
Bits 15 -0: Have a 3120 unit fault (0xFFFF).
Bit 15: Alone, sensor is missing.
Bits 12,8: Under master control- on (1,0).
Bits 12,8: Under master control- off (1,1).
Bits 13,14,11,10,9: 0 not defined, t.b.d.
Unit Serial Number (32-bit) high 16-bit word
Unit Serial Number (32-bit) low 16-bit word
Unit Clock Month- Read register (1 - 12)
Unit Clock Day- Read register (1 - 31)
Unit Clock Year- Read register (2000 - 2150)
Unit Clock Hours- Read register (0 - 23)
Unit Clock Minutes- Read register (0 - 59)
Unit Clock Seconds- Read register (0 - 59)
Unit Clock Set Status- Set pending (1), not (0)
Page 28 Of 46
December 2012
Sensor Electronics Corporation
P/N 1580282, Rev. 1, 20121228