Perle Systems IOLAN SDS User Manual
Page 153
I/O Commands 153
Set IOChannel
enabled
When enabled, the digital input channel or DSR/DCD/CTS input serial signal pins can
be connected to:
z
A Digital output or relay (if the I/O model supports relay) channel on the same
IOLAN
z
Output Serial Signal Pins (DTR/RTS)
z
A Digital output channel on another IOLAN(s) or output serial signal pins
(DTR/RTS) on another IOLAN(s)
z
A TCP/IP application(s) running on a host on the network
When enabled, the digital output/relay channel or DTR/RTS output serial signal pins
can be associated with a digital input channel or input serial signal pins.
Default: Disabled
keepalive
Enables a per-connection TCP keepalive feature. After the configured number of
seconds, the connection will send a gratuitous ACK to the network peer, thus either
ensuring the connection stays active OR causing a dropped connection condition to be
recognized.
This parameter needs to be used in conjunction with server parameter,
monitor-connection-every. The interval determines how long the IOLAN will wait
during inactivity before "testing" the connection. It should be noted that if a network
connection is accidentally dropped, it can take as long as the specified interval before
anyone can reconnect to the serial port.
connection-method
The connection-method is one of the following:
z
Client-Initiated—When specified, the channel/serial signal pin will wait for
connections to be initiated by another I/O channel or a TCP/IP application.
z
Server-Initiated—When specified, the channel/serial signal pin initiates
communication to another I/O channel or a TCP/IP application.
z
Local-Connection—When specified, the input or output, depending on how the
channel or serial signal pin is configured, will be associated with another local
IOLAN I/O channel or serial signal pin.
When the channel is configured as digital input or when configuring an input serial
signal pin, the
Output Channels
parameter displays all the local digital output
signals or relays that it is associated with.
When the channel is configured as digital output, you must select a local digital
input channel or input serial signal pin on the IOLAN.
Note that the
Failsafe Action
is not compatible with the local-connection option.
Default: Client-Initiated
client-initiated tcp-port
The TCP port that the channel/serial signal pin will use to listen for incoming
connections.
Default: 2000 for channel 1, then increments by one for each channel
client-initiated multihost
When this option is enabled, multiple I/O channels and/or TCP/IP applications can
connect to this channel/serial signal pin. The default is off.