Horner APG SmartStack I/O HE800DNS600/HEDNS600 - Manual (Page 28)

MAN0577-03-en
Page 28 of 98 EO 09-0009
DeviceNet Modules
HE800DNM650 & HE800DNS600
4.10 Connection Object Instance Attributes
The Production Inhibit Time, one for each connection, configures the minimum delay time between new
data production in multiples of a millisecond. The timer is reloaded each time new data production
through the established connection occurs. While the timer is running the device suppresses new data
production until the timer has expired. This method prevents that the device is overloaded with to fast
incoming requests.
The value 0 defines no inhibit time and data production can and will be done as fast as possible. If in
polled mode for example a Production Inhibit Time of 1000dec is configured, then the poll request
message to the device will be sent every second.
The Expected Packet Rate, one for each connection, is always transferred to the device before starting
and doing the I/O transfer . The value is used by the device later to reload its 'Transmission Trigger' and
'Watchdog Timer'. The 'Transmission Trigger Timer' is used in a 'cyclic' I/O connection to control the time
when the data shall be produced. Expiration of this timer then is an indication that the associated
connection must transmit the corresponding I/O message. In 'change of state' connections the timer is
used to avoid the watchdog timeout in this connection, when a production has not occurred since the
timer was activated or reloaded.
Note: the Production Inhibit Time is verified against the Expected Packet Rate. If the Expected Packet
Rate value is unequal zero, but less than the Production Inhibit Time value, then an error window is
opened when pressing the OK button or changing to a wrong value.
The Watchdog Timeout Action defines the device behaviour when the watchdog timer in the device
expires. The following values are defined and their functionality is closer described in the DeviceNet
specification.
• Transition to Timed Out: The connection transitions to the Timed Out state and remains in this state
until it is Reset or Deleted.
• Auto Delete: The connection class automatically deletes the connection if it experiences an
Inactivity/Watchdog timeout.
• Auto Reset: The connection remains in the established state and immediately restarts the
Inactivity/Watchdog timer.
4.11 UCMM
Check
The UCMM Check box is used for modules that require the use of UCMM messaging format. Class
1,2,and 3 are supported. Check the documentation for the Slave device to identify if this box must be
checked.
4.12 Fragmented Timeout
If a transmission of I/O data or explicit message is greater than 8 bytes in length, it must be transmitted
on DeviceNet in a fragmented manner. The maximum time the Master will wait until a Slave has to
respond during the fragmented transmissions is the fragmented timeout.
4.13 Parameter
Data
The button Parameter Data can be selected in the Device Configuration window to edit the parameter
data.
If default parameters are configured in the EDS file for this Node, they are inserted automatically when
the menu is chosen the first time.