Perle Systems DS1 Advanced Field Descriptions, Default 30 ms, Message Timeout, Default 1000 ms

Serial Port Profiles

Advanced Field Descriptions

Configure the following parameters:

Idle Timeout Use this timer to close a connection because of inactivity. When the Idle Timeout expires, the IOLAN will end the connection.

Range: 0-4294967 seconds (about 49 days)

Default: 0 (zero), which does not timeout, so the connection is permanently open.

Enable Modbus When enabled, an exception message is generated and sent to the initiating

Exceptions Modbus device when any of the following conditions are encountered: there is an invalid UID, the UID is not configured in the Gateway, there is no free network connection, there is an invalid message, or the target device is not answering the connection attempt.

Default: Enabled

Character Timeout Used in conjunction with the Modbus RTU protocol, specifies how long to wait, in milliseconds, after a character to determine the end of frame.

	Range: 10-10000
	Default: 30 ms
Message Timeout	Time to wait, in milliseconds, for a response message from a Modbus TCP or
	serial slave (depending if the Modbus Gateway is a Master Gateway or Slave
	Gateway, respectively) before sending a Modbus exception.
	Range: 10-10000
	Default: 1000 ms
Session Strings	Controls the sending of ASCII strings to serial devices at session start as
	follows;
	z Send at Start—If configured, this string will be sent to the serial device
	on power-up of the IOLAN or when a kill line command is issued on the
	serial port. If the "monitor DSR" or "monitor DCD" options are set, the
	string will also be sent when the monitored signal is raised.
	Range: 0-127 alpha-numeric characters
	Range: Hexadecimal 0-FF
	z Delay after Send—If configured, will inset a delay after the string is sent
	to the device. This delay can be used to provide the serial device with time
	to process the string before the session is initiated or terminated.
	Default: 10 ms

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