Festo CECX-X-C1 Series, Руководство пользователя

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System manual CECX / Bus link module CECX-B-CO
RxPDO1 8 Byte TxPDO1 8 Byte (CECX-A-4E4A-V)
RxPDO2 2 Byte (DIs) TxPDO2 2 Byte (DOs)
RxPDO3 8 Byte TxPDO3 8 Byte (Ext. Dev.)
RxPDO4 3 Byte (CECX-E-6E-T-P2)
The PDO is set together of one data overhead (addressing, object num-
bers,...) with 8 Byte and the user data specified above. The data transfer
time is 2

s per Bit. (For further information: see the chapter "Baud-rates-
and address settings")
Overhead RxPDO1:
8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
User data RxPDO1: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
Overhead RxPDO2: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
User data RxPDO2: 2 Byte * 8 Bit = 16 Bit * 2

s = 32

s
Overhead RxPDO3: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
User data RxPDO3: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
Overhead RxPDO4: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
User data RxPDO4: 3 Byte * 8 Bit = 24 Bit * 2

s = 48

s
Overhead TxPDO1: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
User data TxPDO1: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
Overhead TxPDO2: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
User data TxPDO2: 2 Byte * 8 Bit = 16 Bit * 2

s = 32

s
Overhead TxPDO3: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
User data TxPDO3: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
Overhead Sync-Signal: 8 Byte * 8 Bit = 64 Bit * 2

s = 128

s
Total: 1648

s
At a cycle time of 10 ms this corresponds with a bus load of 16.48%.
34.9.1.3 Calculation of the power consumption:
The CECX-B-CO makes 8.5 W available for add-on modules.
Add-on modules:
CECX-D-8E8A-NP-2: 0.4
W
CECX-D-8E8A-NP-2: 0.4 W
Total: 0.8 W < 8.5 W

34.9.1.4 Calculation of the bus load:
Determined: Baud rate: 500 kBit Cycle time: 2 ms
Data volume:
Input Output
CECX-D-8E8A-NP-2: 1 Byte 1 Byte
CECX-D-8E8A-NP-2: 1 Byte 1 Byte
Total: 2 Byte 2 Byte
This results in the following suggestion for a PDO-mapping:
RxPDO1 2 Byte TxPDO1
2 Byte
CECX-II 34-28