Table of Contents
Advertisement
Secondary addressing
In addition to primary addressing, the EE77x transmitter provides the option of secondary addressing. The
fields of identification number, manufacturer, version and medium are used together as the secondary
address. The exact sequence of the secondary addressing is described in detail in the M-Bus Standard: http://
www.m-bus.com/files/MBDOC48.PDF.
4.2.2.
Modbus RTU
The measured values are stored as a 32 Bit float value. Depending on the measurement unit selected, the
measurements are saved in SI or US/GB units. The measurement unit can be changed using the configuration
software.
For resetting the MIN/MAX-Values write 0 to the corresponding write register.
For Modbus protocol setting please see Application Note AN0103 (www.epluse.com/EE771).
Modbus Map:
Register
Protocol-
Address
Read Registers (Function Code 0x03 / 0x04) / 32Bit float Value
30026
19
30028
1B
30030
1D
30032
1F
30034
21
30036
23
30261
104
30263
106
30265
108
30267
10A
30269
10C
30271
10E
30273
110
30275
112
30277
114
30279
116
Write Registers (Function Code 0x06) / 16Bit integer Value
60261
104
60262
105
60263
106
60264
107
60265
108
4.2.3.
Data Transmission
Factory Setting
M-Bus
Baud Rate
2400
Data Bits
8
Parity
EVEN
Stop Bits
1
Slave-Address
1
4.2.4.
Addressing
The flow meters are factory-set to address 1. The slave address can be set via switches on the PCB.
Dip-Switch for address setting
Measuring Value
Standardized Flow
Standardized Volumetric Flow
Temperature
Massflow
Consumption reading
Pressure
MIN-Value Standardized Flow
MAX-Value Standardized Flow
MIN-Value Standardized Volumetric Flow
MAX-Value Standardized Volumetric Flow
MIN-Value Temperature
MAX-Value Temperature
MIN-Value Massflow
MAX-Value Massflow
MIN-Value Pressure
MAX-Value Pressure
Reset MIN/MAX-Value Standardized Flow
Reset MIN/MAX-Value Standardized Volumetric Flow
Reset MIN/MAX-Value Temperature
Reset MIN/MAX-Value Massflow
Reset MIN/MAX-Value Pressure
Factory Setting
Modbus
9600
8
EVEN
1
1
Adjustable Values
M-Bus
600...9600
8
None, Odd, Even
1 or 2
0...254
1 - ON
1 - ON
0 - OFF
0 - OFF
1
2
3
4
5
6
1
2
3
4
5
6
1 - ON
1 - ON
0 - OFF
0 - OFF
1
2
3
4
5
6
1
2
3
4
5
6
1 - ON
1 - ON
0 - OFF
0 - OFF
1
2
3
4
5
6
1
2
3
4
5
6
15
SI-Unit
US/GB-Unit
Nm/s
SFPM
Nm
/h
SCFPM
3
°C
°F
kg/h
kg/h
m
ft
3
3
bar
psi
Nm/s
SFPM
Nm/s
SFPM
Nm
/h
SCFPM
3
Nm
/h
SCFPM
3
°C
°F
°C
°F
kg/h
kg/h
kg/h
kg/h
bar
psi
bar
psi
Modbus RTU
9600...57600
8
None, Odd, Even
1 or 2
1...247
7
8
7
8
Factory Setting:
Slave-Address = 1
7
8
7
8
Slave-Address = 255
The address set using
the configurator software
7
8
7
8
is used.
Advertisement
Table of Contents
