Xylem Sensus Modbus RTU User Manual page 4

User Manual
Modbus RTU
Option module for PolluTherm
Designation Modbus
Register
Fabrication 30056 or 40056
Number
Customer 30060 or 40060
Location
Customer 30062 or 40062
Location
Modbus 41001
3,4
Slave ID
Update Rate 41002
Data from
Meter 5
Baud Rate 41003
6
Data Bits 41005
Parity 6,7 41006
Stop Bits 6 41007
Units for Energy, Volume, etc. are available in (Unit) registers and apply to (Float) values as well as
1
integer values multiplied by (Unit factor).
Example on Energy registers - assume Energy = 43, Energy (Unit factor) = 100, Energy (Unit) = "Wh",
Energy (Float) = 4300, then:
Energy register * Energy (Unit factor) register in Energy (Unit) register = 43 * 100 Wh = 4300 Wh
Energy (Float) register in Energy (Unit) register = 4300 Wh
2 Higher byte of the register is major number of firmware version (0x##00). Lower byte of the register is
minor number of firmware version (0x00##).
Lower byte of this register is Modbus address of the module in the range 1-247 (01-F7 hex).
3
4 If the higher byte is set to 1, the Modbus address will be updated to the heat meter M-Bus address.
If the higher byte is set to 0, the Modbus address is static.
Default Update Rate Data from Meter is 4 seconds. Value in Modbus register is 40 because 40 * 100
5
ms gives 4 seconds.
6 The registers should be set only the values represent data format on the EIA-485 serial interface
described in chapter Communication interface above.
This register is set by the ASCII char value – 'E' for Even parity (69 dec, 45 hex), 'O' for Odd parity
7
(79 dec, 4F hex) and 'N' for None parity (78 dec, 4E hex).
More details about Modbus communication and data decoding you find in Modicon Modbus Protocol
Reference Guide and MODBUS over Serial Line - Specification and Implementation Guide documents.
Modbus Modbus
Register Type Address
Input or Holding 55
Input or Holding 59
Input or Holding 61
Holding 1000
Holding 1001
Holding 1002
Holding 1004
Holding 1005
Holding 1006
1
Data Value Unit
Range
8 char ASCII -
Int32 -
8 char ASCII
UInt16 -
UInt16 100 ms
UInt32 -
UInt16 -
UInt16 -
UInt16 -
M H 6123 INT, page 4
Read only (RO)
Read/write (R/W)
RO
RO
RO
R/W
R/W
R/W
R/W
R/W
R/W