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Manual – MOVI-PLC® advanced DHF41B DeviceNet and PROFIBUS DP-V1 Fieldbus Interfaces
19
5
Settings in MOVI-PLC® advanced DHF41B
Project Planning and Startup on the DeviceNet Fieldbus
After adding the MOVI-PLC
®
advanced
DHF41B to the "scan list", the number of polled
I/O bytes must be set to 2 x number of PD (e.g. PD = 16 number of polled input bytes =
32 and output bytes = 32) via "Edit I/O parameters". You can close RSNetWorx once
you have saved and downloaded the DeviceNet configuration to the scanner.
Depending on the DeviceNet configuration and the mapping rules in the scanner, the
data from and to DeviceNet units is packed into a DINT array that is transferred from the
scanner to the local I/O tags of the Logix processor.
In order not to have to search for the data from a certain device in this array manually,
the "DeviceNet Tag Generator" tool automatically generates copy commands and two
controller tags (input & output as byte arrays) for each DeviceNet device.
The tag name contains the MAC-ID of the DeviceNet unit and
POL_I
for polled input
data or
POL_O
for polled output data (see following figure).
5.3
Settings in MOVI-PLC
®
advanced DHF41B
For a detailed description on how to create IEC programs, refer to the "MOVI-PLC
®
advanced
DHE41B/DHF41B/DHR41B Controller" manual. This section only describes
the fieldbus-specific characteristics.
5.3.1
Process data configuration
The process data interface is normally configured by the master (scanner). It sets the
number of process data words and the timeout interval. The number of process data can
also be specified in the IEC program (see following figure) using the
MC_DeviceNetPDConfig
function block.
Setting the
Execute
input to
TRUE
will initialize the fieldbus interface with the value set
at the
ProcessData
input.
12121AXX
12045AXX
0
0
I
Содержание DHF41B
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