Emerson EZMotion User Manual page 78

Advanced Tab
Figure 70:
Max Loss Timeout
This provides a method on the drive to ensure that communication with the DeviceNet network is still present. The SM-DeviceNet
module resets an internal timer when a valid message is received from the DeviceNet network, if a message is not received within
the specified period of time, in ms, the network loss trip is triggered. Default value is 200 ms, but the range is 0 to 3000 ms.
The network loss trip can be disabled by setting this parameter to 0. In this case, the drive will continue to operate using
the last received values. It is the user's responsibility to ensure that adequate safety precautions are taken to prevent
damage or injury by disabling the drive in the event of a loss of communications.
WARNING
Enable PPO 4 Word
When this check box is selected the PPO 4 Word mode is enabled. For more information see the SM-DeviceNet User Guide.
Bus Off Trip Disable
When selected the SM-DeviceNet module will not trip the Unidrive SP/Digitax ST when there is a network fault. See the SM-
DeviceNet User Guide for more information.
Expected Packet Rate Timeout Trip Enable
When selected (enabled) the SM-DeviceNet will trip the Unidrive SP/Digitax ST when the expected packet rate timeout occurs. This
is an alternative network loss trip mechanism to the Network Loss trip. See the SM-DeviceNet User Guide for more information.
66
Slot # View (SM-DeviceNet Advanced Tab)
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EZMotion User/Programming Guide
Revision: A8