Yokogawa AXFA14G/C - Manual (Page 9)

IM 01E20F12-01E 3-2
3. GETTING STARTED
3.2 Master Settings
To activate PROFIBUS PA, the following bus param-
eters must be set for the master.
IMPORTANT
Do not turn off the power immediately after
setting. When the parameters are saved to the
EEPROM, the redundant processing is executed
for an improvement of reliability. If the power is
turned off within 60 seconds after setting is
made, the modified parameters are not saved
and the settings may return to the original
values.
Table 3.2 Bus Parameters
The maximum time a master
station must wait for the
complete reception of the
first octet of a response (11
bits).
e.g: 4095
Sets the minimum time at
which a slave can send the
first bit of a response back.
Sets the maximum time at
which a slave can send the
first bit of a response back.
Controls the time at which
the bus electronics or
software of the sender is set
to receive mode after a
message is sent.
Sets the maximum allowable
time for parameter setting
and response by the slave.
Sets the number of token
cycles after which the
master will search for a new
master.
Sets the number of retries
that are performed after a
receiver does not respond to
a message.
Sets the highest station
address in the network.
The transmission rate of
PROFIBUS PA matches that
of the segment coupler.
e.g P+F: 93.75 kbps,
Siemens: 45.45 kbps
Description and Settings
Transmission
rate
T SL
min T SDR
max T SDR
T SET
G
max. retry
limit
HSA
T QUI
Transmission
Rate
Slot Time
Min. Station
Delay Timer
Max. Station
Delay Time
Setup Time
Gap update
factor
Max Retry
Limit
Highest Station
Address
Quiet Time
Symbol Parameter
T0302.EPS
3.3 Integration of GSD
A PROFIBUS PA system requires a GSD file
containing device parameters such as the supported
transmission rate, input data, output data, data format
and data length.
The following GSD files are available for the AXF.
Table 3.3 GSD files
PA139740.GSD (AIx1, TOTx1)
0x9740
Profile GSD file
0x4590 Device Specific Ident-Number
YEC_4590.GSD Device Specific GSD file
Profile Ident-Number
T0303.EPS
Download GSD for AXF from the following website.
http://www.yokogawa.com/fld/doc/profibus/
IMPORTANT
Do not change contents in the GSD file from the
factory default. The AXF may be given a serious
problem in its operation if do so.