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Generic Slave Device DTM
Section 2-5
device is still processing the last received parameter message and has as yet
not approved nor rejected that message.
During the Diagnostics Update Delay period the PROFIBUS Master Unit will
continue requesting its diagnostics data. Also during this period, the diagnos-
tics data received from this slave will not be updated in the PLC CPU.
DPV1 Tab
PROFIBUS DP-V1 defines extended communication functions between a
PROFIBUS DP-V1 master and a PROFIBUS DP-V1 slave device. These
extensions include:
• Acyclic communications between master and slave, to allow re-parame-
terization, during I/O data exchange.
• Extended alarm reporting and acknowledgement.
Settings related to these extensions are sent to the slave device through the
Set_Prm message.
Note
The CS1/CJ1W-PRM21 PROFIBUS DP Master units will automatically dis-
able the DP-V1 settings to avoid the slave devices to use PROFIBUS DP-V1
functions. Only the CS1/CJ1W-PRM21 PROFIBUS DP-V1 Master Units will
use the settings below.
The DPV1 settings window is shown below.
Enable DPV1
This checkbox enables or disables the DPV1 functions for the specific slave
device. The Master DTM will clear this setting prior to download.
Max. Channel Data Length
This parameter defines the maximum size in bytes of the acyclic message
exchanged with the PROFIBUS DP-V1 Master Unit. The size ranges from 4
bytes to 244 bytes. The actual upper limit of the number is defined by the
buffer capacity of the slave device.