Metrohm 847 Lab Link - Manual (Page 18)

2 Installation
If you enter 0 then automatic updating is switched off. The remote control
display will now only be updated when a button is pressed directly on the
corresponding Touch Control or in the window of the remote control dis-
play. You can trigger a refresh without accessing the Titrando system by
clicking on the green area of the remote control display (see Section 3.5).
Note
With a short interval time you increase the network traffic in remote
operation and slightly delay the reaction when operating Touch Control.
4. With the parameter Request timeout you define the maximum time for
which the Lab Link server is to wait for an answer from the Lab Link in-
strument after a request (e.g. data request).
Standard value: 180 s, Input range: 20 ... 900 s
A running request cannot be interrupted by the Periodic status test. If for
any reason a request cannot bee completed (e.g. power cut affecting the
Touch Control), then this connection remains blocked from the point of
view of the Lab Link server. When this timeout period has elapsed, the
connection will be reset automatically and initialized. In order to avoid un-
intended resetting do not set this time too short.
5. Under ICMP Timeout you can define how long a Lab Link connection
with the status connected is to wait for an answer after a Periodic status
test (ICMP request) has been carried out. When this time has expired the
connection will be shown as non-existent.
Standard value: 2 s, Input range: 1 ... 20 s
In networks with only little traffic a successful ICMP only requires a few
milliseconds. With intensive network traffic this command may take a little
longer. However, we recommend that the timeout setting is not defined
too high as its size directly influences the Periodic status test (because
the server waits for an answer before the next connection in the list is
checked). This applies particularly if a large number of 847 USB Lab Link
devices without Auto connect (via multicast) have been defined (but are
switched off).
6. Under ICMP delay after transfer you should adapt the time to elapse
after a data transfer after which an ICMP request (Periodic status test) is
to be transmitted.
Standard value: 15 s, Input range: 0 ... 40 s
Since successful data transfer indicates a functioning connection, an ad-
ditional ICMP request does not need to be set in this case.
The time shown here indicates the off-time for an ICMP request to the
corresponding TCP/IP address after a successful transmission. A larger
14 847 USB Lab Link / Lab Link Server