The parameters on this page are available in both the "Bereichs-Linien-Segment-Koppler 90232x" application program and the "Bereichs-Linien-Koppler / Verstärker 90242x" application program.
Contents
On the Superordinate Side
Group Telegrams
|
Parameter |
Setting |
|---|---|
|
Group telegrams |
Do not repeat
|
Checks outgoing group telegrams for transmission errors.
|
Setting |
Behavior |
|---|---|
|
Do not repeat |
The telegram is not retransmitted if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received. |
|
Repeat |
The telegram is retransmitted if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received. |
Physical Addresses
|
Parameter |
Setting |
|---|---|
|
Physical addresses |
Do not repeat
|
Checks outgoing physically addressed telegrams for transmission errors.
|
Setting |
Behavior |
|---|---|
|
Do not repeat |
The telegram is not retransmitted if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received. |
|
Repeat* |
The telegram is retransmitted if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received. |
Note
To avoid excessive bus traffic caused by repeated telegrams, this parameter is preset to Do not repeat when the device is operated as a Line Repeater.
Broadcast
|
Parameter |
Setting |
|---|---|
|
Broadcast |
Do not repeat
|
Checks outgoing broadcast telegrams for transmission errors.
|
Setting |
Behavior |
|---|---|
|
Do not repeat |
The telegram is not retransmitted if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received. |
|
Repeat |
The telegram is retransmitted if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received. |
On the Subordinate Side
Group Telegrams
|
Parameter |
Setting |
|---|---|
|
Group telegrams |
Do not repeat
|
Checks outgoing group telegrams for transmission errors.
This parameter defines whether the telegram is retransmitted on the subordinate side if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received.
|
Setting |
Behavior |
|---|---|
|
Do not repeat |
The telegram is not retransmitted in case of transmission errors. |
|
Repeat |
The telegram is retransmitted if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received. |
Physical Addresses
|
Parameter |
Setting |
|---|---|
|
Physical addresses |
Do not repeat
|
Checks outgoing physically addressed telegrams for transmission errors.
This parameter defines whether the telegram is retransmitted on the subordinate side if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received.
|
Setting |
Behavior |
|---|---|
|
Do not repeat |
The telegram is not retransmitted in case of transmission errors. |
|
Repeat* |
The telegram is retransmitted if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received. |
Note
To avoid excessive bus traffic caused by repeated telegrams, this parameter is preset to Do not repeat when the device is operated as a Line Repeater.
Broadcast
|
Parameter |
Setting |
|---|---|
|
Broadcast |
Do not repeat
|
Checks outgoing broadcast telegrams for transmission errors.
This parameter defines whether the telegram is retransmitted on the subordinate side if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received.
|
Setting |
Behavior |
|---|---|
|
Do not repeat |
The telegram is not retransmitted in case of transmission errors. |
|
Repeat |
The telegram is retransmitted if a BUSY Confirm, NACK Confirm, or no ACK Confirm is received. |
On Both Sides
Number of Retransmissions
|
Parameter |
Setting |
|---|---|
|
Number of retransmissions |
1
|
This parameter is displayed only if at least one of the previous parameters is set to Repeat.
It defines the maximum number of retransmissions for a telegram that was not acknowledged successfully.
|
Setting |
Behavior |
|---|---|
|
1 |
A telegram that was not acknowledged successfully is retransmitted once. |
|
3 |
A telegram that was not acknowledged successfully is retransmitted up to three times. |
Note
Especially when using the Line Repeater operating mode, the additional bus load caused by telegram retransmissions should be taken into account.
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