13 CMVPFB01A
Cyclic Data Access
5. Cyclic Data Access
5.1 What is Cyclic Data?
Cyclic / Process / Polled data is the name given to the method used to transfer routine process data
between the network master and slave nodes.
Cyclic data transfer must be configured during network setup.
The terms “OUT data” and “IN data” describe the direction of data transfer as seen by the PROFIBUS-
DP network master controller.
The cyclic data source and destinations are configured and controlled by the SMV PROFIBUS-DP
modules mapping capabilities.
5.2 Mapping Cyclic Data
5.2.1 Data OUT (Dout) Channels
P440 to P445 - Dout Mapping Channels
Default: various Range: 0 - 9
Access: RW Type: Integer
The SMV PROFIBUS-DP module has 6 cyclic OUT channels each of which utilises 1 WORD of data.
Table 7 lists the mapping destinations for OUT going data being sent from the network master.
Last mapping channel not equal to 0 sets the size of Dout data portion.
Table 7 – Data OUT (Dout) Mappings
Parameter Function Default Selection
P440 Dout Channel 0 mapping 1 0 – Disabled
1 – SMV Control Word
2 – Network Command Frequency
3 – Lenze C135 Control Word
4 – Network Speed in unsigned RPMs
5 – Network PID Setpoint
6 – Network Torque Setpoint
7 – Network Speed in signed RPMs (control direction)
8 – Digital Outputs + Relay
9 – Analog Output
P441 Dout Channel 1 mapping 2
P442 Dout Channel 2 mapping 0
P443 Dout Channel 3 mapping 0
P444 Dout Channel 4 mapping 0
P445 Dout Channel 5 mapping 0
WARNING
Modification to the Dout configuration may result in changes to present controller state,
including starting.
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