Lenze AC Tech MotionView OnBoard PositionServo PROFIBUS-DP, Reference Manual, Page: 24 / 35

P94PFB01A 20
Acyclic Parameter Access
6.3.3 8BAD – PID Index (Bytes 2 and 3)
This is the drive parameter index number to be Read or Written to from the master. For the reply message
from the drive this will contain the drive parameter index number that message corresponds to.
6.3.4 8BAD – Data (Bytes 4 to 7)
The actual PID data is present in these 4 bytes. (DWORD)
On read command bit 5 of the Access Control & Status byte indicates whether the data is valid or not.
On write command bit 5 of the Access Control & Status byte indicates whether the write operation is
completed or not.
6.4 Acyclic Parameter Access Examples
Only the acyclic parameter information is configured for the these examples.
6.4.1 Example 1: Read Velocity Accel Limit
Example 1: Read Velocity Accel Limit, PID76 / VAR_ACCEL_LIMIT( = 1000, default value). This first example
provides a valid send/receive transmission and an invalid send/receive transmission for a read operation
from PID76.
Valid Transmission:
SEND: message consisting of:
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7
0x01
0x00
or
0x80
0x00 0x4C 0x00 0x00 0x00 0x00
Read Toggle PID 76 Data
RECEIVE: response consisting of:
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7
0x01
0x10
or
0x90
0x00 0x4C 0x00 0x00 0x03 0xE8
Read Valid response PID 76 Data = 1000
Invalid Transmission:
SEND: message consisting of non-existing PID:
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7
0x01
0x00
or
0x80
0x03 0x08 0x00 0x00 0x00 0x00
Read Toggle PID 776 Data
RECEIVE: response consisting of:
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7
0x01
0x12
or
0x92
0x00 0x4C 0x00 0x00 0x00 0x00
Read
Valid response,
PID does not exist
PID 776 Data = 0
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