Instructions

Transactions 33
Doc: HMSI-27-306, Rev. 3.11Anybus Communicator PROFIBUS User Manual
6.4.2 Consume Transactions
Trigger byte address This parameter specifies location of the trigger byte in the internal memory buffer.
If “Update mode” is set to “Change of state on trigger”, the memory location specified by
this parameter is monitored by the gateway. Whenever the trigger byte is updated, the
gateway will produce the transaction on the sub-network.
This way, the control system can instruct the gateway to produce a specific transaction on
the sub-network by updating the corresponding trigger byte.
The trigger byte should be incremented by one for each activation. Please note that the
trigger byte address must be unique to each transaction. It can not be shared by two or
more transactions.
Note: This parameter has no effect unless the “Update mode” parameter is set to “Change
of state on trigger”.
Valid settings range from 0x200 to 0x3FF and 0x400 to 0xFFF
Parameter Description
Offline options for sub-network This parameter specifies the action to take for this transaction if the sub-network goes
offline. This affects the data that is sent to the higher level network.
• Clear
Data is cleared (0) on the higher level network if the sub-network goes offline
• Freeze
Data is frozen on the higher level network if the sub-network goes offline
Offline timeout time (10 ms) This parameter specifies the maximum allowed time between two incoming messages
in steps of 10ms. If this time is exceeded, the sub-network is considered to be offline. A
value of 0 disables this feature, i.e. the sub-network can never go offline.
The entered value is multiplied by 10. An entered value of 5 will result in 50 ms.
Trigger byte • Enable
Enables the trigger byte. The location of the trigger byte must be specified in “Trig-
ger byte address”.
The trigger byte value will be increased each time a valid transaction has been con-
sumed by the gateway.
The trigger byte will also be increased if the offline option is set to “Clear” and the
offline timeout time value is reached.
This feature enables the control system to be notified each time new data has been
consumed on the sub-network.
• Disable
Disables the trigger byte functionality.
Trigger byte address This parameter specifies the location of the trigger byte in the internal memory buffer.
Valid settings range from 0x000 to 0x1FF and 0x400 to 0xFFF.
Please note that the trigger byte address must be unique to each transaction. It can not
be shared by two or more transactions.
Parameter Description