Crestron SIMPL™ Windows
Software
address to the list of entries. To change an entry, select it and click
Modify
; to
remove an entry, select it and click
Delete
. Use the
Copy
command to make minor
modifications to an entry without need to re-type all the information. To connect to
an IP address, select it and click
Connect
.
Some IP addresses (usually hosts on the Internet) have associated
domain names
.
The
DNS Lookup
command retrieves the domain name, if any, of the current IP
address.
The
Wait for Connection
command causes the Viewport to listen for a TCP/IP
connection to be initiated from another control system or computer. Enter the port
number and click
OK
. To take Viewport out of listening mode, click
Cancel
.
PC Passthrough
PC Passthrough
refers to a communication method whereby a remote PC connects
to a local control system by using a local PC as a bridge. This is typically used in
troubleshooting situations where a programmer must access a customer's control
system from outside the customer's LAN. Since the control system is likely to be
protected behind a firewall, Ethernet access will not be possible; and depending on
the location of the control system, a physical link using serial cables may not be an
option either.
In this scenario a local PC can establish communication with the control system
using RS-232 or TCP/IP, as usual. The local PC would then enter PC Passthrough
mode. The remote PC then connects to the local PC, usually via modem, enabling the
remote PC to communicate with the control system just as if a direct connection
existed.
Local PC Settings
To enter PC Passthrough mode, click
PC Passthrough
and specify the type of
connection that will be established with the remote PC. In the scenario just
described, this will a modem connection, although TCP/IP and direct RS-232 are
also available options.
To specify a modem connection click
RS-232
to enable the serial settings options.
Click
Modem
as the connection type and select the COM port where the modem is
installed. (Note that the initialization string issued to the modem is specified in
Modem Settings
on the Viewport
Setup
menu. For PC Passthrough, the string is
given in the
PC Passthrough Initialization String
field. Viewport provides default
initialization strings that are standard for most modems.)
Next, select the PC settings for baud rate, parity, and the number of data bits and stop
bits. (In most cases the default settings, N, 8, 1 be kept.) Click
Start
to begin PC
Passthrough mode
.
To specify an RS-232 connection, click
RS-232
and then choose
Direct
. Select the
appropriate COM port on the PC and then select the other serial communication
settings. (Here again the default settings can be kept in most cases.) Click
Start
to
begin PC Passthrough mode.
Finally, to specify an Ethernet connection, simply click
TCP/IP
, and then click
Start
. The PC will listen for a connection from the remote PC.
Remote PC Settings
Once the local PC is brought into PC Passthrough mode, the remote PC can establish
communication as follows:
Installation & Operations Guide – DOC. 5728C
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