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Time till next cycle (only in Master Mode)
This parameter defines the time after which a new request cycle has to begin. If the time is too
short, the cycle will not be completed. This is indicated by the red flashing of the RTU LED
❻
.
Multi read requests (only in Master Mode)
When this parameter is activated, Modbus registers which lie one after the other in the channels
are combined in a multi-read request.
The slave address and the function code must be identical. The register address must
be continuous, but repetitions may occur. A maximum of 16 channels can be combined.
Example:
Type Slave address: Common
Channel 1
– MB to KNX – Read holding register – Address 0
Channel 2
– MB to KNX – Read holding register – Address 1
Channel 3
– MB to KNX – Read holding register – Address 2
Channel 4
– MB to KNX – Read holding register – Address 2
Channel 5
– MB to KNX – Read holding register – Address 3
Channel 6
– MB to KNX – Read holding register – Address 4
Channel 7
– MB to KNX – Read holding register – Address 4
The result is a read-multi-holding-register request for addresses 0
– 4.
Diagnostic objects
Activated, objects for diagnostic are displayed and provide information about the communication
with the respective slave device.
Modbus master:
If no response is received from the slave device,
“No communication – On” is sent to the KNX bus
via the diagnostic object.
Modbus slave:
If no request is received from the master within the time interval,
“No communication – On” is sent
to the KNX bus via the diagnostic object.
Group object
Type KNX
Size
Direction
GO 276 Diagnostic: Slave (common)
– No communication
1.001
1 bit
To KNX
