Horner APG SmartStack I/O HE800PBS600/HEPBS600 User Manual
Page 36
Setings
MAN0575-04-EN
PAGE 36 of 97
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Profibus Modules User Manual
EO 09-0009
Synchronization time (T
SYN
)
This is the minimum time that must be available to each device as a rest condition before it is allowed to
accept the start of a query. It is defined at 33 Bit times.
The following parameters are applicable only for PROFIBUS-DP:
Data Control Time (Data_Control_Time)
This parameter defines the time within the Data_Transfer_List is updated at least once. After the
expiration of this period, the Master (class 1) reports its operating condition automatically via the
Global_Control command.
Value range: 1 .. 65535 (time basis 10ms)
Min Slave Interval (Min_Slave_Interval)
This parameter defines the minimum time period between two Slave list cycles. The maximum value that
the active Stations require is always given.
Value range: 1 .. 65535 (time basis 100us).
Access Monitoring (T
WD
)
Access monitoring T
WD
at the Slave ensures that when an interruption of the DP Master occurs, the
outlets are placed in a secure condition after this time period.
Poll Timeout (Poll_Timeout)
This parameter defines the maximum time period in a Master-Master relationship within which the
answer must be fetched by the Requestor.
Value range: 1 .. 65535 (time basis 1ms).
T
ID1
and T
ID2
This is the time that the Sender spends at idle after the receipt of the last Bit of a telegram on the Bus,
until the first Bit of a new telegram is sent on the Bus.
Depending on the type of the telegram:
T
ID1
starts after the Initiator has received an acknowledgement, answer or a Token telegram.
T
ID1
= max (T
QUI
+ 2 * T
SET
+ 2 + T
SYN
min T
SDR
). (*)
Formula 3: T
ID1
T
ID2
starts after the Initiator has sent a telegram that is not acknowledged.
T
ID2
= max (T
QUI
+ 2 * T
SET
+ 2 + T
SYN
max T
SDR
). (*)
Formula 4: T
ID2
These times cannot be set directly, they result from the given calculations.
(*) Depending on the ASIC and Baud rate utilized, the T
ID1
and T
ID2
can take on somewhat different
values due to the ASIC software.
5.5 Rules
For min T
SDR
, max T
SDR
and T
SL
the following rule applies:
0 < min T
SDR
< max T
SDR
< T
SL
Formula 5: Min T
SDR
, Max T
SDR
and T
SL
For T
QUI
, T
RDY
and min T
SDR
the following rule applies:
T
QUI
< T
RDY
< min T
SDR
.