
4. Activating and configuring DeviceNet
Festo
P.BE-CMMS-FHPP-DN-SW-EN
en
1103a
17
DIP switch
Baud rate
DIP switch 9 = 1
DIP switch 10 = 1
500 kBit
Table 4.3 Assignment of DIP switches 9 and 10
When the MAC-ID und the bit rate have been set, the DeviceNet communication can be
activated. Please note that the above mentioned parameters can only be modified when
the protocol is deactivated. All parameters are only valid when the DeviceNet
communication is deactivated and then re-activated.
Please note that the DeviceNet communication can only be activated when the parameter
records have been saved and a Reset has been carried out.
4.4
Assignment of the I/O data for CMMD
With CMMD, control via FHPP for axis 1 and axis 2 always takes place over a shared
fieldbus interface. If an interface is activated, it is always valid for both axes.
Each axis has its own I/O data.
Assignment of the I/O data over the fieldbus depends on the control interface used:
DeviceNet
The two axes have a shared bus address, which is set via the DIP switches.
The I/O data for the two axes are transferred in a shared telegram of double length.
Example (with FPC):
Byte 1 ... 8:
control/status bytes axis 1
Byte 9 ... 16:
FPC axis 1
Byte 17 ... 24:
control/status bytes axis 2
Byte 25 ... 32:
FPC axis 2
Please note
With DeviceNet, the I/O data for axis 2 are read by axis 1, passed on
to axis 2 and evaluated there. The answer is returned to axis 1 with
the next internal communication task (every 1.6 ms) at the earliest.
Only then can the answer be returned via the fieldbus.
This means that the processing time of the fieldbus protocol is twice
as long as with CMMS.
Содержание CMMD-AS
Страница 2: ......