Modbus Register Map 2011-04-18 Rev3 - APRS World, LLC

evised 2011-04-18 by JJJXRW2G Modbus Register MapNotes:Addresses are actual addresses as sent "over the wire". For PDU address, add 1.All registers on this page are read only. Some status register reads trigger events.Counter ChannelsValue RangeNotesAddress Channel Description Low High0pulse count 0 65535 rolls over1 pulse time 0 655352 pulse min time 0 6553503 standard deviation ? ? not implemented4 pulse sum, low wordmust read low word first0 42949672965 pulse sum, high word6pulse count 0 65535 rolls over7 pulse time 0 655358 pulse min time 0 6553519 standard deviation ? ? not implementedmust read low word first0 429496729612pulse count 0 65535 rolls over13 pulse time 0 6553514 pulse min time 0 65535215 standard deviation ? ? not implementedmust read low word first0 42949672961016pulse sum, low wordpulse sum, low word1117pulse sum, high wordpulse sum, high wordAnalog ChannelsValue RangeAddress Channel Description Low HighNotes18current value 0 409519 0 averaged value 0 409520 standard deviation ? ? not implemented21current value 0 409522 1 averaged value 0 409523 standard deviation ? ? not implemented24current value 0 409525 2 averaged value 0 409526 standard deviation ? ? not implemented27current value 0 409528 3 averaged value 0 409529 standard deviation ? ? not implemented30current value 0 409531 4 averaged value 0 409532 standard deviation ? ? not implemented33current value 0 409534 5 averaged value 0 409535 standard deviation ? ? not implemented36current value 0 409537 6 averaged value 0 409538 standard deviation ? ? not implemented39current value 0 409540 7 averaged value 0 409541 standard deviation ? ? not implementedStatus and Sample ControlValue RangeAddress Description Low HighNotes42 sequence number (increments when read) 0 65535 rolls over43 ticks, 10 millisecond since last measurement 0 65535 stops counting at 6553544 uptime minutes 0 65535 stops counting at 6553545 read to trigger new measurement 0 046 read to trigger reset of pulse sum 0 047 Modbus packets for us0 6553548 Modbus packets for others0 6553549 Modbus last error0 3 0=NO ERROR1=ILLEGAL FUNCTION2=ILLEGAL DATA ADDRESS3=ILLEGAL DATA VALUEALL OTHERS UNDEFINED50 read to clear Modbus counters and last error0 051 XBEE_SLEEP State of line if in I/O mode 0 1 Only defined when USE FOR I/O52 XBEE_RTS is select. 0=input or output53 XBEE_CTS Can be read from or written to low, 1=input or output high

evised 2011-04-18 by JJJXRW2G Modbus Register MapNotes:Addresses are actual addresses as sent "over the wire". For PDU address, add 1.Read Configuration Value RangeRead / Write LegendNotesWrite Address Channel Description Low High R ReadableR/(FW) 1000 Serial number prefix 'A' 'Z' Must Write EEPROM to save W WriteR/(FW) 1001 Serial number 0 65535 (FW)R 1002 Hardware Model R/WR 1003 Hardware Version R/(FW)R 1004 Software ModelR 1005 Software VersionR/W 1006 Modbus Address0 127 Default is 24R/W 1007 Modbus Speed0 1 0=9600, 1=19200 Immediate change. Only applied inModbus mode.R/W 1008 Modbus Mode0 1 0=RTU, 1=TCP-RTUR/W 1009 Transmit WorldData every n seconds1 65535 Will transmit WorldData only if JP3 jumpered duringboot.R/W 1010 Serial number prefix to trigger transmit 'A' Z' Set to 0 to disableR/W 1011 Serial number to trigger transmit 0 65535R/W 1012 Discrete I/O on status lines 0 1 0=STATUS LINES NORMAL, 1=USE FOR I/OR/W 1013 XBEE_SLEEP Status line input or output select 0 1 0=OUTPUT, 1=INPUT (when USE FOR I/O selected)R/W 1014 XBEE_RTS Status line input or output select 0 1R/W 1015 XBEE_CTS Status line input or output select 0 1R/W 1100 AN0 Averaging mode 0=Normal averagingR/W 1101 AN1 Averaging mode 1=Vector averageR/W 1102 AN2 Averaging modeR/W 1103 AN3 Averaging modeR/W 1104 AN4 Averaging modeR/W 1105 AN5 Averaging modeR/W 1106 AN6 Averaging modeR/W 1107 AN7 Averaging modeR/W 1108 Sample analog every n*10 milliseconds 1 65535 Filtered in 16 element per channel FIRW 1999 Write EEPROM 1 1 1 causes settings writeW 19999 Passcode for factory programming Write onlyFactory WriteableRead and writeableRead and factory writeable