ProSoft Technology MVI56-104S - Manual (Page 33)

Configuring the MVI56-104S Module MVI56-104S ♦ ControlLogix Platform
User Manual IEC 60870-5-104 Server Communication Module
ProSoft Technology, Inc.
Page 33 of 188
November 18, 2009
2.4.3 Clear Queue on Close
0 or 1
Use this command to define whether the module will store the unacknowledged
buffers in the unit after the connection is closed. If the specification is to be
followed, set this parameter to 0 and the packets will be resent after a connection
is made. If you want to flush the packets after the connection is closed, set this
parameter to 1 (this is not according to the IEC 60870-5-104 specification).
2.4.4 t1 Timeout Set Value
1 to 255
This is the timeout of send or test ASDUs and is in units of seconds. After a
packet is sent from the unit, the client must acknowledge the packet within this
time interval or else the unit will close the connection.
2.4.5 t2 Timeout Set Value
1 to 255
This is a timeout of when to send an S-format message to the host to
acknowledge outstanding messages received. This parameter is in units of
seconds and must be less than the value set for t1.
2.4.6 t3 Timeout Set Value
1 to 255
This is the timeout to wait on an idle line before the unit will send a TestFr.Act
message. This value is in units of seconds.
2.4.7 k (maximum queue)
1 to 20
This parameter specifies the number of unacknowledged messages the unit will
buffer. This parameter must match that in the host. If the set number of buffers
are filled in the unit, no other messages will be sent until the host unit
acknowledges some or all the messages.