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7
LaMarche ARBS Modbus Implementation
Supported Modbus Types
RTU
TCP
Supported Modbus Function Codes
02 -- Read Discrete Input Registers
03
– Read Holding Registers
04
– Read Input Registers
02 - Discrete Inputs
Address
Name/Description
10000
DC1 Low Voltage Alarm Indicator (FAILURE=1)
10001
DC2 Low Voltage Alarm Indicator (FAILURE=1)
10002
DC1 Relay Indicator (DE-ENERGIZED=1)
10003
DC2 Relay Indicator (DE_ENERGIZED=1)
03
– Holding Registers
Address
Description, Units, Valid Settings/Range
Scale Factor
40000
Operating Mode, None,
DC1 Only Mode = 1
DC2 Only Mode = 2
DC1 and DC2 Mode = 3
Cycling Mode = 4
None
40001
Cycling Mode, Days, 1 7 14 21 30
None
40002
DC1 Low Voltage Alarm Delay, Seconds, 0 to 255
None
40003
DC1 Low Voltage Alarm Threshold, Volts, 0 to MAXV
0.1
40004
DC1 Low Voltage Alarm Reset, Percent, 0 to 100
None
40005
DC2 Low Voltage Alarm Delay, Seconds, 0 to 255
None
40006
DC2 Low Voltage Alarm Threshold, Volts, 0 to MAXV
0.1
40007
DC2 Low Voltage Alarm Reset, Percent, 0 to 100
None
04
– Input Registers
Address
Description, Units
Scale Factor
30000
Heartbeat. Increments continuously to indicate communications
are working.
None
30001
Board Number. Will read 225 for 225C card.
None
30002
Software Version, Version of software on 225C card.
None
30003
DC1 DC Voltage, Volts
0.1
30004
DC2 DC Voltage, Volts
0.1