NETLink
®
Switch
60
the rack field must be entered for bus address 49 (00110001
Bin
;
31
Hex
) and the value 17 (00010001
Bin
; 11
Hex
) in slot field.
For parameterization tools that offer a field with a name like
‘Re-
mote TSAP’
for parameterization instead of separately parame-
terizable rack and slot fields, the value of the bus address can be
entered directly without being taken apart and converted.
For example, for bus address 2, the hex value
‘0102’
can be en-
tered and for bus address 49 the hex value
‘0131.’
An address conversion table is given in Section 11.5 to simplify
this task.
Q:
If I mix RFC1006 connections and connections via the STEP7
driver, the link sometimes breaks off or error messages appear say-
ing that it is not possible to establish a link.
A:
For communication with S7-300 modules it may be necessary
to parameterize the communication resources.
The user can influence the allocation of existing
‘connection re-
sources’
under object properties of the CPU in the hardware con-
figuration.
Q:
When the adapter is plugged onto the PROFIBUS, no online
connection is possible.
A:
If possible, use the auto baud functionality.
If this is not possible or not desired, check the timing parameters
for the PROFIBUS in the STEP7 configuration. Enter the read val-
ues into the advanced bus parameter settings via the ‘
Bus parame-
ters’
button. If on-line access is still not possible, set a higher ‘Ttr’
both in the NETLink
®
Switch and on the CPU.
Q:
What should I look out for when implementing Internet tele-
service via a router?
A:
If the NETLink
®
Switch devices are in a private network behind
a router, they cannot be addressed by their private IP address on
the fixed NETLink
®
Switch port 7777 from the Internet.
To be able to address the devices from the Internet despite this, a
‘public’ port is configured in the router for each NETLink
®
Switch.
