BTL5-T110...
Configuration and Profibus Connection –
Transducer Class 3/4
37
english
6
Startup (cont.)
6.7
DP-V2 terms and abbreviations
being processed) when there is
an External User Diagnostic. If
this behavior is not desired,
OB82, OB86 and OB122 should
be implemented in the controller.
The error behavior can be
decoded in these OBs
specifically for each PROFIBUS
station. To do this, select the
CPU in the hardware configurator
and open the menu 'Options' ->
'Report system errors'.
➥
➥
➥
➥
➥
Fig.
6-18 Reporting system errors to
the OBs is activated using the
check box 'Create error OBs'.
The contents of the error OBs
must then be correspondingly
decoded in the control program.
Table 6-20: DP-V2 terms and abbreviations
Area
Symbol
Description
Explanation
General
Subscriber
Reading slave
Slave that receives data in slave-to-slave
communication
General
Publisher
Sending slave
Slave that sends data in slave-to-slave
communication
General
SYNCH
Synchronization signal
Component of a GC telegram, input signal for
the PLL in DP-V2.
Time
T
DX
Duration of clock-synchronous
data communication
Time duration of clock-synchronous data
communication for reading and writing the set
and actual values, e.g. position, velocity
Time
T
DP
DP cycle time
Duration of a clock-synchronous cycle
Time
T
MAPC
Master application cycle time
Master cycle time = n * T
DP
with
n {1, 2, 3 ... 15}
Time
T
SAPC
Slave application cycle time
Slave cycle time < T
DP
Does not have to be a whole-number multiple of
T
DP
Time
T
I
Time of clock-synchronous
reading
Point in time for clock-synchronous reading of
the data (may not be less than the greatest T
I_min
of all slaves)
Time
T
I_min
min. time for clock-synchronous
reading
Latest possible point in time for clock-
synchronous reading of the data, is defined in
the GSD file. For the definition of this time the
maximum deviation of the DP cycle time must
be taken into account.
Time
T
O
Time of clock-synchronous output
Point in time for clock-synchronous output of
the data.
Time
T
O_MIN
min. time for clock-synchronous
output
Minimum time until all slaves have process the
data in order to then output it.
Time
T
BASE_IO
I/O-base time
I/O – base time
Time base for times T
O
, T
I
Time
T
BASE_DP
DP base time
DP – base time
Time base for T
DP
State Machine
MLS
Master sign-of-life
Used to ensure that the master is working
correctly. Is monitored by each slave.
State Machine
SLS
Slave sign-of-life
Used to ensure that the slave is working
correctly. Is monitored by the master.
PLL
T
PLL_W
Window time
Time during which a SYNCH is expected.
PLL
T
PLL_D
Delay time
Delay time for compensating bus run times.
