Chapter 6 – Communication
Installation and Start-up Guide for NPBA-01
6-8
Parameters in Cyclic
Communication
In cyclic communication parameters are transferred by PPO message
types 1, 2 and 5 (see Table 6-2 on previous page). The Parameter
Identification part consists of eight bytes (see below).
The Request Label is used by the master when transmitting data to the
slave, while the Response Label is used by the slave. The tables below
show the Request/Response functions.
Request Label (Master to Slave)
Request
Function
Ack (+)
Ack (-)
0
No task
0
-
1
Parameter value read
1
7
2
Parameter value write (word)
1
7
3
Reserved
4
One element of description read
3
7
5
One element of description write (name)
3
7
6
Parameter value read (array)
4
7
7 to 15
Reserved
Response Label (Slave to Master)
Response
Function
0
No response
1
Parameter value updated (word)
2
Parameter value updated (long)
3
Description updated
4
Parameter value updated (array)
7
Task not executable (+ Fault Code; see below)
9
Request signal
ID
IND
VALUE
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Request Label
Response Label
*Request Signal
Parameter Number
Process Data
Parameter
Identification
*
Not used by ACS600
