
A.SETTING WHEN EDITION 07 OR EARLIER OF SERIES 6557 IS USED SUPPLEMENT B-62924EN/04
- 172 -
Table A-1 summarizes the bus parameters. Table A-2 lists the bus
parameter values to be set for each transfer rate. For details, refer to
the following documents issued by PROFIBUS Nutzerorganisation
e.V.:
¡ PROFIBUS STANDARD DIN 19 245 Part 1
This document describes data transfer, access methods, protocols,
and interfacing with the application layer.
¡ Draft Standard PROFIBUS-DP DIN 19 245 Part 3
This document describes an abstract model of the PROFIBUS-
DP communication function, and so forth.
Table A-1 Bus Parameters
Item Description
FDL ADD Fieldbus data link address.
Station number of the DP-Master.
BAUDRATE Transfer rate code number.
(0:9.6 kbps, 1:19.2 kbps, 2:93.75 kbps, 3:187.5 kbps, 4:500 kbps, 6:1.5 Mbps, 7:3 Mbps,
8:6 Mbps, 9:12 Mbps)
T SL Slot time.
Maximum time from token frame transmission until the first character of a response frame is
read. (Unit: Bit time)
MIN T SDR Minimum station delay time of responders.
Minimum elapsed time from the last bit of send or receive data to the first bit of the next send
or receive data. (Unit: Bit time)
MAX T SDR Maximum station delay time of responders.
Maximum elapsed time from the last bit of send or receive data to the first bit of the next send
or receive data. (Unit: Bit time)
T QUI Transmitter fall/repeater switch time.
Wait time after data transmission until the receiver can be operated again. (Unit: Bit time)
T SET Setup time.
Time after the occurrence of an event until the execution of the corresponding action is
started. (Unit: Bit time)
T TR Target rotation time.
Estimated time required for a PROFIBUS token to make one rotation. (Unit: Bit time)
G Gap update factor.
Number of tokens that rotate during a gap maintenance period.
HSA Highest station address.
Maximum node number set on the PROFIBUS.
MAX RETRY Maximum number of retries.
BP FLAG User interface flag.
Bit 7: Error_Action_Flag
0: Does not change the operation mode if an error occurs.
1: Changes the operation mode from Operate mode to the Clear mode if an error occurs.
Bits 6 to 0: Reserved (to be set to 0)
MIN SLAVE INT Minimum slave interval between two slave poll cycles.
Minimum polling interval between slaves. (Unit: 100
µ
s)
POLL TIME OUT Poll timeout for master-master communication.
Maximum wait time after the issue of a request for communication between master stations
until a response is received. (Unit: 1 ms)
DATA CONTROL Time until the data transfer list is updated at least once. (Unit: 10 ms)
CLASS2 NAME Master who created this parameter sets.
Name of the DP-Master (class2) that created the bus parameters.
MASTER USER DATA Data necessary for the bus parameters and specified by the manufacturer.