Lon Subscriber Check - Viessmann VITOTRONIC 200 Service Instructions Manual

LON subscriber check

To check the communication between the heat pump
control unit and connected LON subscribers.
Requirements:
■ Heat pump control unit is fault manager ("LON fault
manager 7779").
A unique subscriber number is set for every connec-
■
ted subscriber ("LON subscriber number 7777").
■ The LON subscriber list in the fault manager is up to
date.
1. Service menu:
Press and hold OK +
approx. 4 s.
2. "Service functions"
3. "Subscriber check"
4. Select LON subscriber.
5. Start the subscriber check with OK.
Service PIN
To identify the integral LON communication module,
the heat pump control unit sends a message to all
other LON subscribers.
Note
Only required with "tool binding", i.e. if the heat pump
control unit is integrated into a LON with devices from
other manufacturers, e.g. BMS system.
Viessmann LON manual
Subscribers (Modbus/KM-BUS)
List of all subscribers connected to the control unit via
Modbus or KM-BUS. The connection parameters for
each subscriber can be displayed.
1. Service menu:
Press and hold OK +
approx. 4 s.
2. "Service functions"
3. "Modbus1 subscriber": Subscriber list with con-
nection status for devices connected via X18 on
the controller and sensor PCB.
"Modbus2 subscriber": Subscriber list with con-
nection status for devices connected via
the controller and sensor PCB.
"KM-BUS subscriber": Subscriber list with con-
nection status for devices connected via KM-BUS.
simultaneously for
å
simultaneously for
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on
sVA
Possible displays:
■ No display (status unknown):
LON subscriber has not yet responded, but has not
yet been identified as failed.
■ "Failed" :
LON subscriber has not responded for more than
20 min ("Interval for data transfer via LON 779C").
"Check":
■
Displayed for the duration of the subscriber check.
"WINK" flashes on the display of the selected LON
subscriber for around 30 s.
■ "Check OK":
Successful communication between the heat pump
control unit and the LON subscriber
■ "OK"/"Fault":
LON subscriber has responded. Everything is OK or
the LON subscriber has a fault.
■ "Check ERR":
No communication between the heat pump control
unit and the LON subscriber.
Check the LON connection and LON parameters.
1. Service menu:
Press and hold OK +
approx. 4 s.
2. "Service functions"
3. "Service PIN"
The message is being sent. No operation is possi-
ble for approx. 4 s.
4. Select subscriber and display connection parame-
ters with OK.
Example for "Modbus1 subscriber"
Refrigerant circ controller
Subscriber add.
Baud rate/parity
Status
Fault code
Timeout counter
Back with
Fig. 47
Service functions
simultaneously for
å
30
19200/Even
0K
0x00
12
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