Manual – MOVIDRIVE® MDX60B/61B Communication and Fieldbus Unit Profile
49
5
CANopen profile via CAN
CAN Interfaces of MOVIDRIVE® B
Example
The COB ID of RX-PDO3 is to be changed from 401
hex
to 403
hex
. The COB ID of RX-
PDO3 is stored in index 1402
hex
, subindex 1.
• Send NMT service for "enter pre-operational".
• The value 403
hex
must be written to index 1402, subindex 1.
Transmission
mode
Various transmission modes can be selected for each
TX-PDO
:
• Event-controlled and synchronous (value 0):
Every time the process data of a TX-PDO changes, this TX-PDO is sent after the next
SYNC pulse.
• Cyclic and synchronous (value 1 - 240):
After every SYNC pulse (1st to 240th, depending on the value), the TX-PDO is sent
regardless of whether the content of the TX-PDO has changed or not.
• Manufacturer-specific (value 254):
This TX-PDO is sent when the corresponding RX-PDO is received.
Example: TX-PDO2 has the transmission mode 254. A TX-PDO2 is sent directly after
a valid RX-PDO2 has been received (valid means that the length is not too long or
too short).
• Event-controlled and asynchronous (value 255):
This TX-PDO is set by MOVIDRIVE
®
B every time a value of the TX-PDO changes.
Default setting for all PDOs: Cyclic and synchronous (transmission mode = 1).
TIPS
Observe the following notes:
• With MOVIDRIVE
®
B, 29-bit COB IDs and RTR telegrams are not permitted for re-
questing TxPDOs. Therefore, bits 29 and 28 - 11 of the PDO COB IDs must always
be set to "0". MOVIDRIVE
®
B automatically sets bit 30 to "1".
• COB IDs can only be changed in "pre-operational" unit state.
• New values are only accepted for the COB ID when it is an 11-bit ID (that is, bit 29
must not be set) and if the ID has not already been assigned to another PDO or the
emergency object (see chapter "Emergency object).
TIPS
If the speed, current, position or similar values that change quickly are set via the TX-
PDO, this causes a very high load on the bus.
The inhibit time can be used to limit the bus load to predictable values (see section
"Inhibit time").
Summary of Contents for MOVIDRIVE MDX60B
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