105U-G Wireless Gateway
User Manual
Page 83
© September 2004
The storage format determines if word values are stored in big endian (Motorola – most
significant byte has lowest address) or little endian (Intel – Least significant byte has lowest
address) format.
Group Properties Tab
A DP master can send the SYNC and/or FREEZE control commands simultaneously to a
group of slaves for synchronization purposes. Therefore the slaves must be assigned to
Sync/Freeze - groups. Up to 8 groups may be configured as SYNC and/or FREEZE groups.
Any slaves that are configured to belong to a particular group (via that slaves
module
properties|group assignment
configuration) may be synchronized using the
Message
Interface
instruction
SET_SLAVE_MODE
(see section on the
Message Interface
below).
Bus Parameters Tab
The bus parameters can be adjusted only when the selected profile is
user defined
(see
Profibus Tab
above). These parameters should only be changed if the user is familiar with the
individual profibus parameters according to the profibus specification.
Adjustable bus parameters:
Tslot
The slot time determines the maximum length of time the sender has to wait to receive a
response from the partner.
Max. Tsdr + 15
<= Tslot
<= 16.383 t_bit
Max Tsdr
The maximum station delay responder determines the maximum length of time required by
the responding node to respond
35 + 2*Tset + Tqui <=
Max. Tsdr
<= 1.023 t_bit