Communications configuring
3-54
System- and communication configuring D7-SYS - SIMADYN D
Edition 12.2003
Example:
•
Synccycle=4 x sampling time
•
Bus circulating time=2 x sampling time
•
Assumption:
The SYNPRO function block calculates at the center of the sampling
time (after all of the receive- and transmit blocks)
Sampling time
Synczyklus
Bus circulating
time
Output SOK
1
0
(1)
(2)
(3)
(4)
(1)
(2)
SYNC_command
SYNC_quit
SYNC_command
(4)
Fig. 3-17
Timing diagram SYNC version 3
After the SYNC command has been initiated, the transmit- and receive
blocks are inhibited for three sampling times (one bus circulating time +
one sampling time) (SOK=0). The transmit- and receive blocks are
enabled in the fourth sampling time after the SYNC command has been
initiated (SOK=1).
3.5.1.5 Diagnostics
function
block
Master- or slave-specific diagnostic information can be output from
PROFIBUS DP using the DIAPRO function block.
The diagnostic data to be output are selected using input SEL. It is output
at D01 to D08.
Further information
on the diagnostic data, refer to the User Documentation
"COM PROFIBUS" or in the User Documentation for the individual
slaves.
SEL=0:
No diagnostic data
•
The block does not output any valid diagnostic data.
SEL=126:
System diagnostics
•
The system diagnostics provides an overview as to which slave has
provided diagnostic data.
General
Overview,
diagnostic data
