This table summarizes the main FDL parameters that can be read and written with management services.
Times are consistently given with the transmission period of one bit in tBit. Protocol-dependent parameters are therefore independent of the bit rate.
Name |
M |
S |
Meaning |
Range |
---|---|---|---|---|
x |
x |
FDL address of target station |
0 – 126 |
|
Baud rate |
x |
x |
Bit rate setting |
9,6; 19,2; 31,25; 45,45; 93,75; 187,5; 500; 1500, 3000; 6000; 12000 kbit/s |
Medium_red |
x |
x |
Does this station have a redundant bus connection? |
single; redundant |
HW Release |
x |
x |
HW version number |
0 to 32 readable characters |
SW Release |
x |
x |
SW version number |
0 to 32 readable characters |
x |
x |
Time-slot, i.e. the in period during which the initiator - a master - awaits an answer from the responder |
52 to 216-1 tBit |
|
min TSDR |
x |
x |
Minimum response time |
20 to 216-1 tBit |
max TSDR |
x |
|
Maximum response time (maximum value of all stations in network) |
20 to 216-1 tBit |
TQUI |
x |
|
How long it takes after transmission of a signal until the quiescent level prevails again. |
0 to 28-1 tBit |
TSET |
x |
|
How long the transmitting direction has to be switched on before one can begin with the data. |
20 to 28-1 tBit |
TTR |
x |
|
Planned token circulation time |
20 to 224-1 tBit |
G |
x |
|
GAP update factor |
1 to 100 |
in_ring_desired |
x |
|
Here the master indicates whether it wants the token or not. |
true; false |
HSA |
x |
|
Highest projected station address. The GAP update is only performed up to this address. |
2 to 126 |
x |
|
Number of telegram retries if no answer is received. |
1 to 8 |
|
Frame_sent_count |
opt. |
|
Number of telegrams sent. |
0 to 232-1 |
Retry_count |
opt. |
|
Number of telegram retries. |
0 to 216-1 |
SD_count |
opt. |
opt. |
How many start delimiters have been received correctly? |
0 to 232-1 |
SD_error_count |
opt. |
opt. |
How many start delimiters have been received incorrectly? |
0 to 216-1 |
TRR |
x |
|
Token Real Rotation Time |
20 to 224-1 tBit |
LAS |
x |
|
List of active masters on bus |
Array of addresses |
GAPL |
x |
|
List of all stations on bus |
Array of 127 addresses with FDL status |
M = mandatory service for a master
S = mandatory service for a slave