PROFIBUS DP communication module
9.7 Process data and process images
3RW44 soft starters
170
Manual, 03/2017, NEB535219502000/RS-AB/008
9.7
Process data and process images
Definition of process image
The process image is part of the system memory of the DP master. At the start of the cyclic
program, the signal states of the inputs are transferred to the process image of the inputs. At
the end of the cyclic program, the process image of the outputs is transferred to the DP slave
as a signal status.
For soft starters with PROFIBUS DP, the following process image is available:
●
Process image with 2 bytes of outputs/2 bytes of inputs (16 O/16 I)
Table 9- 7
Process data and process images
Process data
Process image:
(16 O, DO 0.0 to DO 1.7)
(16 I, DI 0.0 to DI 1.7)
DO-0.
0
Motor CW
1
Motor CCW
2
Not used
3
Trip reset
4
Emergency start
5
Available
6
Slow speed
7
Not used
DO-1.
0
Output 1
1
Output 2
2
Parameter set bit 0
*)
3
Parameter set bit 1
*)
4
Not used
5
Not used
6
Not used
7
Disable quick stop
Inputs
DI-0.
0
Ready (automatic)
1
Motor ON
2
Group fault
3
Group warning
4
Input 1
5
Input 2
6
Input 3
7
Input 4
