Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 380)

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378 DMS 3.2 EN 02/2011 TD29

PDO Properties dialog
Each PDO message requires a unique COB-Id (Communication Object Identifier).
The field appears in grey and cannot be edited if an option is not be supported by the
module or if the value cannot be changed.
The Inhibit Time is the minimum time between two messages from this PDO. This is
to prevent PDOs which are sent when the value is changed from being sent too often.
The CMS Priority Group cannot be changed and describes the relative importance of
the PDOs during the CAN transmission. Values from 0 to 7 are displayed, whereby 0 is
the highest.
Transmission Type offers you a selection of possible transmission modes for this
module:
• acyclic - synchronous: the PDO will be transmitted synchronously but not
periodically.
• cyclic – synchronous: the PDO will be transmitted synchronously, whereby the
Number of Sync's gives the number of synchronisation messages, which lie
between two transmissions of this PDO.
• synchronous – RTR only: the PDO will be updated after each synchronisation
message but not sent. It is only sent when there is an explicit request to do so
(Remote Transmission Request)
• asynchronous – RTR only: the PDO will only be updated and transmitted when
there is an explicit request to do so (Remote Transmission Request)
• asynchronous – device profile specific and asynchronous - manufacturer specific:
the PDO will only be transmitted when specific events occur.
Number of Syncs: If cyclic transmission has been set, enter here the number of
synchronisation messages (see 'Com. Cycle period' in the CAN parameter dialog)
which should be sent between two transmissions of the PDO.