D02706R02.30 L-PRO 4000 User Manual Appendix E-1
Appendix E Modbus RTU Communication
Protocol
All metering values available through the terminal user interface are also avail-
able via the Modbus protocol. Additionally, the Modbus protocol supports the
reading of unit time and time of the readings and provides access to trip and
alarm events, including fault location information. All metering readings can
be frozen into a snapshot via the “Hold Readings” function (see Force Single
Coil function, address 0).
Read Coil Status (Function Code 01)
Channel Address Value
Hold Readings 1 0: Readings not held 1: Readings held
Reserved 257 Reserved Reserved
Output Contact 1 513 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 2 514 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 3 515 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 4 516 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 5 517 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 6 518 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 7 519 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 8 520 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 9 521 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 10 522 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 11 523 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 12 524 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 13 525 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 14 526 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 15 527 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 16 528 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 17 529 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 18 530 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 19 531 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 20 532 0: Contact Open (inactive) 1: Contact Closed (active)
Output Contact 21 533 0: Contact Open (inactive) 1: Contact Closed (active)
21P1 Trip 769 0: Off (inactive) 1: On (active)
21P2 Trip 770 0: Off (inactive) 1: On (active)
21P3 Trip 771 0: Off (inactive) 1: On (active)
21P4 Trip 772 0: Off (inactive) 1: On (active)
51 Trip 773 0: Off (inactive) 1: On (active)
50 Trip 774 0: Off (inactive) 1: On (active)
21N1 Trip 775 0: Off (inactive) 1: On (active)
21N2 Trip 776 0: Off (inactive) 1: On (active)
21N3 Trip 777 0: Off (inactive) 1: On (active)
21N4 Trip 778 0: Off (inactive) 1: On (active)
68 Power Swing 779 0: Off (inactive) 1: On (active)
Z Circle Trigger 780 0: Off (inactive) 1: On (active)
51N Trip 781 0: Off (inactive) 1: On (active)
50N Trip 782 0: Off (inactive) 1: On (active)
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