Siemens SIMATIC S5 Manual page 76

Start-Up, Tests, and Diagnostics
Table 3-8 lists the parameters, their meanings and their permissible range of values of the bus
parameter block for the STB display 'Job completed without error' (see detailed explanation of the
parameters in section 1.4).
Table 3-8. Bus Parameter Block Values for a READ_VALUE Confirmation
Byte Parameter
8 tln
(byte)
9 sta
(word)
10 hsa
(byte)
11 bdr
(byte)
12 to trt
15 (double word)
16 & 17 st
(word)
18 & 19 set
(byte)
20 & 21 STD1
(word)
22 & 23 STD2
(word)
24 rtr*
(byte)
25 gap*
(byte)
Bus parameters irrelevant for S5-95U user (for further explanations of the bus parameters, refer to
*
PROFIBUS Standards DIN 19245)
3-22
Significance
Address of the local station
Type of the local station
Highest active station address
Baud rate
Target rotation time
In this time, the token should have
been passed once to every active
station.
Slot time
(initiator waits for reply frame)
Set-up time
Minimum station delay time
Maximum station delay time
Number of call-up retries to a
remote, non-replying station
Gap update factor
S5-95U, SINEC L2
Value Range / Code
active stations 0 to 31
passive stations0 to 126
00H=passive
01H=active
1 to 126
0 = 9.6 KBaud
1 = 19.2 KBaud
2 = 93.75 KBaud
3 = 187.5 KBaud
4 = 500 KBaud
5 = 1.5 MBaud
256 to 1 048 320 bit times
34 to 4095 bit times
0 to 494 bit times
11 to 255 bit times
35 to 1023 bit times
1 to 8
Default in the S5-95U: 1
2 to 255 in multiples of the
target rotation time
Default in the S5-95U: 20
EWA 4NEB 812 6112-02