Performance
Section 2-3
26
Note
When the Unit is configured to receive user defined CAN messages, the I/O
refresh time is not always constant over all PLC cycles. The refresh time
depends on the number of CAN messages matching the identifier filter,
which were received since the previous I/O refresh.
Refer to the PLC Operation Manual for more detailed calculations of the PLC
cycle time.
2-3-2 CAN(open) Interface
This sub-section describes the performance of the physical layer of CAN and
the performance of the CANopen interface of C200HW-CORT21-V1.
The following figure depicts the transmission of CAN messages on the bus.
Message delay time
Every message has a certain message delay time, which is mainly
determined by the size of the data field in the message. CAN's bit-stuff
mechanism (after every 5 consecutive equal value bits, a bit of the opposite
polarity is added) can increase the message delay time by a maximum of
15%. The following formulas give the minimum and maximum message
delay time.
Содержание C200HW-CORT21-V1
Страница 2: ...C200HW CORT21 V1 CANopen Slave Unit OPERATION MANUAL OMRON Cat No W904 E2 2 ...
Страница 3: ......
Страница 4: ......
Страница 5: ......
Страница 6: ...C200HW CORT21 V1 CANopen Slave Unit Operation Manual Produced June 2001 ...
Страница 7: ...iv ...
Страница 9: ...vi ...
Страница 13: ...x ...
Страница 47: ...Performance Section 2 3 30 ...
Страница 85: ...Control and Status area Section 4 3 68 ...
Страница 113: ...Flow diagrams Section 6 6 96 ...
Страница 123: ...Maintenance Section 7 3 106 ...
Страница 133: ...116 ...
Страница 135: ...118 ...
Страница 139: ...122 ...
Страница 141: ......