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Profisafe Network .pdf (331Kb)

Profibus General Notesl

The basic principles to take into account...

a) The data rate of the Profibus segment must be defined according to the slowest equipment, which very often is the radio modem. So, if you are willing to use wireless communication and cables in the same site, you should have a dedicated segment for radios.

b) If the device is a touch panel or some other kind of control panel, there may occur some lack of communication capacity.

c) The interfacing can be done either by using the CRS-PB (YC0501) cable or by using the NARS-2 interface adapter, depending on the most practical approach for connecting the cables to the PLC.


1. Master-to-Slave,  or Master-to-MultiSlaves

1a) Radio modem parameters


Model =
SATELLINE-3AS-NMS
Channel spacing = 25 kHz

Com port 2 = RS-485, 9600-8-E-1

FEC = OFF

Firmware = 4.0.13

Other parameters as defaults.


Identical settings for all the modems in a system.


1b) Profibus parameters


HSA = equal to the real highest station address in the system

Data speed = 9600 bps


Tslot_Init = 1000
Max. Tsdr = 980
Min. Tsdr = 36
Tset = 1
Tqui = 0
Gap factor = 50
Retry Limit = 5

Ttr = 46001

Watchdog = 87837

2. Master-to-Repeater-to-Slave,  or Master-to-Repeater-to-MultiSlaves


2a) Radio modem parameters


Model = SATELLINE-3AS-NMS

Channel spacing = 25 kHz

Com port 2 = RS-485, 9600-8-E-1

FEC = OFF

Firmware = 4.0.13


Radio modem addresses (examples):

Master

Tx addresses = 0001/0001

Rx addresses = 0004/0004

Repeater

Tx addresses = 0004/0002

Rx addresses = 0003/0001

Slave or Slaves

Tx addresses = 0003/0003

Rx addresses = 0002/0002


Other parameters as defaults.


2b) Profibus parameters


Tslot_Init = 2000
Max. Tsdr = 980
Min. Tsdr = 36
Tset = 255
Tqui = 20
Gap factor = 50
Retry Limit = 5

Ttr = 62612

Watchdog = 119508

 

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