Chapter 6 – Communication
6-5
Installation and Start-up Guide for NPBA-01
PROFIBUS-DP
The PROFIBUS-DP protocol is a distributed I/O system which enables
the master to use a large number of peripheral modules and field
devices. The data transfer is mainly cyclic: the master reads the input
information from the slaves and sends the output information back to
the slaves.
For further information on the Service Access Points, refer
to the manual of the PROFIBUS master,
PROFIDRIVE – The
PROFIBUS Profile for Adjustable Speed Drives, or the DIN 19245
standard, Parts 1 and 3.
DP Communication
Start-up
The following Service Access Points (SAPs) are used to initiate DP
communication:
SAP 61 (Set_Prm)
This SAP is used in the parametrisation of the ACS 600.
SAP No.
Short Name
Name
61
Set_Prm
Send Parameter Data
62
Chk_Cfg
Check Configuration Data
60
Slave_Diag
Read Slave Diagnostic Information
128 (Default)
Data_Exchange
Transfer Input and Output Data
Prm_Data (Parameter Data)
Type: Octet String - Length: 7
Byte
Hex
Value
Description
1
Station_Status (Lock_Req; Unlock_Req; Sync_Req;
Freeze_Req; WD_On)
2 to 3
00
Watchdog Factors 1 and 2 (unavailable for the NPBA-01)
4
0A
Minimum Station Delay Respond Time (the time after which a
slave station is allowed to send response frames to the master).
Calculated by multiplying the Hex value with t
Bit
(the time
required for transmitting one bit)
5 to 6
0815
Identification Number (for the NPBA-01: Hex 0815)
7
Group Identification