8Bad - Pid Index (Bytes 2 And 3); 8Bad - Data (Bytes 4 To 7); Acyclic Parameter Access Examples; Example 1: Read Velocity Accel Limit - Lenze AC Tech MotionView OnBoard PositionServo PROFIBUS-DP Reference Manual

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
0x01
Read
RECEIVE: response consisting of:
Byte 0
0x01
Read Valid response
Invalid Transmission:
SEND: message consisting of non-existing PID:
Byte 0
0x01
Read
RECEIVE: response consisting of:
Byte 0
0x01
Valid response,
Read
PID does not exist
P94PFB01A
Acyclic Parameter Access
Byte 1 Byte 2
0x00
or 0x00
0x80
Toggle PID 76
Byte 1 Byte 2
0x10
or 0x00
0x90
PID 76
Byte 1 Byte 2
0x00
or 0x03
0x80
Toggle PID 776
Byte 1 Byte 2
0x12
or 0x00
0x92
PID 776
Byte 3 Byte 4 Byte 5
0x4C 0x00
Byte 3 Byte 4 Byte 5
0x4C 0x00
Byte 3 Byte 4 Byte 5
0x08 0x00
Data
Byte 3 Byte 4 Byte 5
0x4C 0x00
20
Byte 6 Byte 7
0x00 0x00 0x00
Data
Byte 6 Byte 7
0x00 0x03 0xE8
Data = 1000
Byte 6 Byte 7
0x00 0x00 0x00
Byte 6 Byte 7
0x00 0x00 0x00
Data = 0