Functions; Positioning In The Profibus-Fms Network; Bus Parameters - Mitsubishi Electric A1SJ71PB96F User Manual

4. FUNCTIONS

4. FUNCTIONS
4.1

Positioning in the PROFIBUS-FMS Network

The AJ71PB96F/A1SJ71PB96F in PROFIBUS-FMS network is positioned to the following.
(1) The AJ71PB96F/A1SJ71PB96F operates as a master station in the PROFIBUS-FMS
network.
(2) The AJ71PB96F/A1SJ71PB96F contains both client and server functions.
4.2

Bus Parameters

The bus parameters are the communication parameters prescribed for the PROFIBUS protocol No. 2
layer operation. Bus parameters are set using the SW0IX-PROFPE.
The bus parameter rangers and default values that can be set in AJ71PB96F/A1SJ71PB96F are
shown below.
Local address
Baud rate
Slot time
Min Tsdr
Max Tsdr
Quiet Time
Setup Time
Target Rotation Time
GAP Update Factor
Has
Max Retry Limit
Remark
Following is an explanation of the terminology used for bus parameters.
Tsdr:
Bit Time:
Slot Time:
Min Tsdr:
Max Tsdr:
Quiet Time:
Setup Time:
Target Rotation Time: If the actual token rotation time becomes larger than this time, cyclic
GAP Update Factor:
HSA:
Max Retry Limit:
Table 4.1 Bus Parameters Setting Items
Item Unit
Bit Time
Bit Time
Bit Time
Bit Time
Bit Time
Bit Time
Station Delay Time as Responder
The time required to transmit 1 bit = 1/baud rate
The maximum time that the requester must wait for a response from the
responder. Max Tsdr < Slot Time
The minimum time required for the responder to respond.
Quiet Time < Min Tsdr, Setup Time < Min Tsdr
The maximum time required for the responder to respond.
The time required for the repeater to switch from the transmission mode to the
receive mode.
The time required for the requester to switch from the transmission mode to
the receive mode.
communication will no longer be possible.
This shows how many times the station information can be updated for 1 token
rotation.
Station information update interval = G x Target Rotation Time
Highest Station Address. The highest address of the stations connected to the
network.
The maximum number of transmission retries when data transmission fails.
Setting range
0 to 126
9.6, 19.2, 93.75, 187.5, 500, 1500kbps
37 to 16383
11 to 1023
37 to 65535
0 to 127
1 to 255
256 to 16777215
1 to 100
1 to 126
0 to 7
4-1
MELSEC-A
Default value
0
9.6kbps
100
30
50
22
5
10000
1
126
1