Functions
6.11 Operation in fieldbus systems
SINAMICS G110D
Operating Instructions, 07/2016, FW V3.63, A5E36768472B AB
175
Table 6- 61 Default output process image (master to slave) - Single slave mode
Bit
Usage
Description
DO0
Motor control bit 0
DO3 DO2 DO1 DO0
0 0 0 0 OFF1
0 0 0 1 Fixed frequency 1 (default 50 Hz)
0 0 1 0 Fixed frequency 2 (default -50 Hz)
0 0 1 1 Fixed frequency 3 (default 10 Hz)
0 1 0 0 Fixed frequency 4 (default 15 Hz)
0 1 0 1 Fixed frequency 5 (default 20 Hz)
0 1 1 0 Fixed frequency 6 (default 25 Hz)
0 1 1 1 Fixed frequency 7 (default 30 Hz)
1 0 0 0 Fixed frequency 8 (default 35 Hz)
1 0 0 1 Fixed frequency 9 (default 40 Hz)
1 0 1 0 Fixed frequency 10 (default 45 Hz)
1 0 1 1 Fixed frequency 11 (default 50 Hz)
1 1 0 0 Fixed frequency 12 (default 55 Hz)
1 1 0 1 Fixed frequency 13 (default 60 Hz)
1 1 1 0 Fixed frequency 14 (default 65 Hz)
1 1 1 1 With active trip: Fault acknowledge (1)
With no trip: OFF2 (2)
DO1
Motor control bit 1
DO2
Motor control bit 2
DO3
Motor contr0l bit 3
(1) The AS-i specification mandates the simultaneous use of ‘Motor Left’ and ‘Motor Right’ as fault acknowledge, particu-
larly if there is no spare input available for this function.
(2) If no fault is active then simultaneous operation of ‘Motor Left’ and ‘Motor Right’ constitutes a process image error. In
this state both the inverter motor outputs and the motor holding brake outputs are inactive, causing the motor to coast to a
halt and engaging the motor holding brake in exactly the same way as an OFF2 command. This state is maintained until
both ‘Motor Left’ and ‘Motor Right’ are deactivated at the same time.
PKW mechanism for parameter transfer
A single message type is used which contains the parameter number to be read or written.
The structure of the message is based on the PKW protocol as used in USS
communications.
Structure
The basic structure of the PKW is shown in the figure below. it consists of two words of
metadata followed by parameter data s required. As required by AS-i, all transfers are
initiated by the AS-i master and where appropriate, responded to by the slave.
Image 6-34 PKW component structure
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