Kobold KME, Operating Instructions Manual

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Operating instructions for KME flow meter for compressed air and gases
4.1.1 Switch and pulse outputs
Switch and pulse outputs are NOT potential-free and include internal pull-down resistors (fig.10)
V+
GND
GND
10k 10k
OUT 1
OUT 2
Fig. 10 Switch/pulse output
4.2 Bus output (projected)
4.2.1 M-Bus (Meter Bus) (projected)
The M-Bus (Meter Bus) is a field bus for recording consumption data. Transmission runs serially
on a reverse polarity protected two-wire line. The KME flow meter as M-Bus slave requires a sep-
arate supply voltage. There is no prescribed specific topology (line or star) for the wiring. Normal
phone cable of type J-Y(St)Y Nx2x0.8 mm can be used. The max. cable length per segment
(primary addressed) is 250 m (3.28 ft).
The table below shows the structure of the consumption data sent by the transmitter:
Header
68 Start of the telegram
4F 4F L-field (length)
68 Second starting signal
08 C-field (RSP_UD)
XX A-field (address)
Start user data
72 CI-field (variable data structure)
XX XX XX XX Identification number
A5 16 Manufacturer (0x16A5 … EUE)
01 Version
09 Medium (9 … compressed air)
XX Access number (consecutive)
00 Status
00 00 Signature
Data record 1: Volume flow
05 DIF (32 bit real)
3E VIF (volume flow in m³/h)
XX XX XX XX Cur. measured value
Data record 2: temperature
05 DIF (32 bit real)
5B VIF (temperature in °C)
XX XX XX XX Cur. measured value
Data record 3: Mass flow
05 DIF (32 bit real)
53 VIF (mass flow in kg/h)
XX XX XX XX Cur. measured value
Data record 4: Consumption meter status
05 DIF (32 bit real)
16 VIF (volumes in m³)
XX XX XX XX Cur. consumption value
Data record 5: Flow velocity
05 DIF (32 bit real)
7F VIF (manufacturer-specific in m/s)
XX XX XX XX Cur. measured value
Data record 6: Volume flow
04 DIF (32 bit integer)
3B VIF (volume flow in 10-³ m³/h)
XX XX XX XX Cur. measured value
Data record 7: temperature
04 DIF (32 bit integer)
59 VIF (temperature in 10-² °C)
XX XX XX XX Cur. measured value
Data record 8: Mass flow
04 DIF (32 bit integer)
51 VIF (mass flow in 10-² kg/h)
XX XX XX XX Cur. measured value
Data record 9: Consumption meter status
07 DIF (64 bit integer)
13 VIF (volumes in 10-³ m³)
XX XX XX XX
XX XX XX XX
Cur. consumption value
Data record 10: Flow velocity
04 DIF (32 bit integer)
7F VIF (manufacturer-specific in 10-²
m/s)
XX XX XX XX Cur. measured value
end user data
XX Checksum
16 End of telegram