Transactions
6-3
Parameters (Response)
(To gain access to these parameters, select a Response-transaction in the Navigation Section)
Transaction Parameters (Generic Data Mode)
Produce-Transactions
(To gain access to these parameters, select a Produce Transaction in the Navigation Section)
Parameter
Description
Trigger byte
This parameter is used to enable/disable the trigger functionality for the response. If
enabled, the gateway will increase the trigger byte by one when the gateway receives new
data from the sub-network. This can be used to notify the control system of the updated
data.
The location of the trigger byte is specified by the ‘Trigger byte address’ parameter below.
Trigger byte address
This parameter specifies the location of the trigger byte in the internal memory buffer.
Valid settings range from 0x000... 0x1FF and 0x400... 0xNNN
Parameter
Description
Offline options for fieldbus
This parameter specifies the action to take for this transaction if the higher level net-
work goes off-line. This affects the data that is sent to the sub-network.
• Clear
Data is cleared (0) on the sub-network if the higher level network goes offline
• Freeze
Data is frozen on the sub-network if the higher level network goes offline
• NoScanning
Stop sub-net scanning for this transaction if the higher level network goes offline
Update mode
The update mode for the transaction:
• Cyclically
The transaction is sent cyclically at the interval specified in the ‘Update Time’-
parameter.
• On data change
The transaction is sent each time its data has changed.
• Single shot
The transaction is sent once at startup.
• Change of state on trigger
The transaction is sent when the trigger byte has changed. This feature enables
the control system to notify the gateway when to issue a particular transaction. To
use this feature correctly, the control system must first update the data area asso-
ciated with the transaction, then increase the trigger byte by one. The location of
the trigger byte is specified by the ‘Trigger byte address’ parameter.
Update time (10ms)
This parameter specifies how often the transaction will be issued in steps of 10ms
(only relevant when ‘Update mode’ is set to ‘Cyclically’).
