Intesis
TM
KNX
– Modbus Master
User Manual r1.0 eng
© HMS Industrial Networks S.L.U - All rights reserved
This information is subject to change without notice
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KNX System
In this section, a common description for all Intesis KNX series gateways is given, from the point of view of KNX
system which is called from now on
internal system
The Modbus system is also called from now on
external system
.
Description
Intesis gateway KNX connects directly to the KNX TP-1 (EIB) bus and behaves as one more device into the KNX
system, with the same configuration and operational characteristics as other KNX device.
Internally, the circuit part connected to the KNX bus is opto-isolated from the rest of the electronics.
Intesis KNX receives, manages and sends all the telegrams related to its configuration to the KNX bus.
When receiving telegrams of KNX Groups associated to internal datapoints, the corresponding messages are sent
to the external system (Modbus) to maintain both systems synchronised in every moment.
When a change in a signal of the external system is detected, a telegram is sent to the KNX bus (with the associated
KNX group) to maintain both systems synchronised in every moment.
The status of the KNX bus is checked continuously and, if a bus drops down is detected, due to a failure in the bus
power supply for example, when the KNX bus is restored again, Intesis will retransmit the status of all the KNX groups
marked as
"T" Transmit
. Also, the
Updates
of the groups marked as
"U" Update
will be performed. The behaviour of
each individual point into Intesis is determined by the flags configured for the point.
Comms status Communication Objects
Intesis gateway has several KNX communication objects to get information about Modbus errors in Modbus
communications.
Number Name
DPT
Description
1000
Status_Error/Alarm
1.005 [0-No Alarm; 1-Alarm] It reports if there is some error on the
Modbus communications. If there are
timeouts or exceptions.
1001
Status_Modbus Dev Error
8.* 2-byte signed value
[Slave Id]
In case of alarm or error, it reports Modbus
device address which has errors or alarms.
1002
Status_Error Text
16.001 Character String
It is a String with all information about the
alarm or error “ss:ff:aaaa:ee”, where:
•
ss: SlaveId (“00”…”3F”)
•
ff: Functi
on code (“00”…”10”)
•
aaaa: Address (“0000”…”FFFF”)
•
ee: Exception code (“00”…”0F”)
Exception codes are the same as in
Modbus plus “0F” which is the
comm error.
