Commissioning and configuration
Leuze electronic
BCL 504
i
101
TNT 35/7-24V
The two processes can also be mixed in order to create a multi-master system. The
BCL 504
i
functions both in a mono-master system as well as in a multi-master system.
Notice!
In 2007, the PROFIBUS DP was extended by the DPV2 specification. The specification will
then also permit slave-slave communication. The BCL 504
i
does not support this type of
communication.
10.1.3
Device types
With the PROFIBUS DP, there are two types of master and one type of slave:
Notice!
The device is defined as a slave in the device master file (GSD file) of the BCL 504
i
!
10.1.4
Expanded DP functions
The PROFIBUS standard has been expanded (DPV1) and, in addition to the cyclic services,
also offers acyclic services. These services operate in parallel with the cyclic user-data
communication. Masters and slaves can use additional READ and WRITE functions as well
as ALARM functions. This is intended especially for operation with an engineering tool (DP-
master class 2, DPM2) in order to change parameters and read out status information during
normal operation.
The acyclic services operate with lower priority. The functions are different for the various
master classes.
Device type
Description
BCL 504
i
Class 1 master
(DPM1)
Class 1 masters are defined for the user-data communi-
cation. (e.g.PLC,PC)
Class 2 Master
(DPM2)
Class 2 masters are defined for commissioning pur-
poses. Additional services facilitate easier configuration
as well as device diagnosis.
Slave
The slave is a peripheral device which makes available
input data for the control and receives output data from
the control.
X
Table 10.2:
PROFIBUS DP master and slave types
Function
Slave SAP Description
BCL 504
i
MSAC1_Read
SAP51
Read datablock at slave
Yes
1)
1)
For I&M functionality
MSAC1_Write
SAP51
Write datablock at slave
Yes
2)
2)
For I&M functionality
MSAC1_Alarm_Acknowledge SAP50
Alarm acknowledgement from
master to slave
No
Table 10.3:
Services for DPVM1 class 1 and slaves