Badger Meter ER-500 - Page 28

Data Component
Name
MODBUS Registers
Available Units
Long Integer
Format
Single Precision
Floating Point Format
Spare 40600…40601 40700…40701 –
Flow Rate 40602…40603 40702…40703
Gallons, Liters, MGallons, Cubic Feet, Cubic Meters, Acre
Feet, Oil Barrel, Liquid Barrel, Feet, Meters, Lb, Kg, BTU,
MBTU, MMBTU, TON
Per
Second, Minute, Hour, Day
Spare 40604…40605 40704…40705
Positive Totalizer 40606…40607 40706…40707
Grand Total Totalizer 40608…40609 40708…40709
Battery Voltage 40610…40611 40710…40711 x.xx
Spare 40612…40613 40712…40713
For reference: If the ER-500 totalizer = 12345678 hex
Register 40606 would contain 1234 hex (Word High)
Register 40607 would contain 5678 hex (Word Low)
Modbus Coil Description Modbus Coil Notes
Reset Running Totalizer 1
Forcing this coil ON will reset the running totalizer. After reset, the coil
automatically returns to the OFF state.
Reset Grand Totalizer 2
Forcing this coil ON will reset both the running totalizer and the grand totalizer.
After reset, the coil automatically returns to the OFF state.
—
3…8 Spares
Alarm Setpoint 1 9 0 = Setpoint OFF, 1 = Setpoint ON
Alarm Setpoint 2 10 0 = Setpoint OFF, 1 = Setpoint ON
—
11…16 Spares
Opcode 01 - Read Coil Status
This opcode returns the state of the alarm coils. The following Coils are defined:
Coil # Description
9 Alarm Setpoint 1
10 Alarm Setpoint 2
11 and up Spare
Command: <addr><01><00><08><00><02><crc-16>
Reply: <addr><01><01><0x><crc-16>
Opcode 03 - Read Holding Registers
This opcode returns the input holding registers, such as flow rate or totalizer.
OTE:N Each value must be requested individually. Return of a block of registers is not implemented at this time.
Example requesting flow rate in floating point format.
Command: <addr><03><00><C9><00><02><crc-16>
Reply: <addr><03><02><data><data><crc-16>
Opcode 05 - Force Single Coil
This opcode sets the state of a single coil (digital output). The following Coil Registers are defined:
Coil # Description
1 Reset Totalizer
2 Grand Totals
3 and up Spares
The transition of coil from 0 to 1 will initiate function. This bit is auto reset to 0, so there is no need to set it to 0 after a totalizer
reset command.
Command: <addr><05><00><00><FF><00><crc-16>
Reply: <addr><05><00><00><FF><00><crc-16>
Modbus Interface
DSY-PM-00028-EN-02Page 28 February 2017