Laurel Electronics Modbus Protocol For Series 2 Laureate Digital Panel Meters, Counters, Timers & DIN-Rail Transmitters - Manual (Page 21)

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74 004A Serial Config 2 Bits 4:0 Meter Serial Address (0-31) [Non-Modbus]
Hex 0 = Broadcast (01 = 1 to 0A = 10),
0F = 15, 10 = 16, 1F = 31
Bit 5 0 = Continuous Mode, 1 = Command Mode
Bit 6 0 = No Alarm data with readings, 1 = Alarm data
Bit 7 0 = No LF following CR, 1 = LF following CR
75 004B Serial Config 3 Bits 2:0 for DPM. Data sent in serial output
0 = Reading, 1 = Peak, 2 = Valley,
3 = Rdg + Peak, 4 = Rdg + Valley,
5 = Rdg + Peak + Valley
Bits 2:0 for Scale Meter
0 = Net + Gross
1 = Net only
2 = Gross only
3 = Peak only
4 = Net + Gross + Peak
Bit 3 0 = Termination chars at end of all items
1 = " " at end of each item
Bit 4 0 = Non-latching RTS, 1 = Latching RTS
Bit 5 0 = Normal continuous serial transmission
1 = Special Start & Stop characters
Bit 6 0 = Full Duplex 1 = Half Duplex
76 004C Serial Config 4 Bits 1:0 00 = No Parity 01 = Odd Parity
10 = Even Parity
Bits 3:2 00 = Custom ASCII 01 = Modbus RTU
10 = Modbus ASCII
Bits 5:4 Modbus ASCII Gap Timeout
00 = 1S, 01 = 3S, 10 = 5S, 11 = 10S
77 004D Config
(applicable to
DPM) Bit 0 0 = Linear Curve 1 = Custom Curve
Bit 1 0 = 2-wire RTD Read 1= 2-wire RTD Short
Bits 2 0 = No Auto-tare 1 = Auto-tare
Bits 4:3 Peak button display response
00 = Peak 01 = Valley
10 = Peak then Vall. 11 = Tare
Bits 7:5 000 = Not Rate 001 = Rate x 0.1,
010 = Rate x 1 011 = Rate x 10,
100 = Rate x 100 101 = Rate x 1000
110 = Rate x 10000
77 004D Config
(applicable to
Scale Meter) Bit 1 0 = Peak of net value 1 = peak of gross value
Bit 2 0 = Dribble enabled 1 = Dribble disabled
Bit 3 0 = Scale & offset setup method
1 = Reading coordinates of 2 points method