Table 20:
IEC 60870-5-104 I frames RX time-out (t2)
Description
Value
Type
Timeout
Units
Seconds
Value range
1...255
Note
The value “t2” must be smaller than “t1”. The IEC
60870-5-104 standard suggests t2 = 10 seconds.
Link test interval (t3)
defines the interval in seconds how often the IEC
60870-5-104 link is tested if there is no other activity.
Table 21:
IEC 60870-5-104 link test interval (t3)
Description
Value
Type
Timeout
Units
Seconds
Value range
1...65000
Note
This parameter must be adjusted according to
the criticality of the link. The IEC 60870-5-104
standard suggests 20 seconds but the practical
value may be substantially longer for pay-per-
use GPRS connections.
Suspended timeout
defines the time in seconds how long a connected IEC
60870-5-104 link can be in the suspended state (STOPD) before the device closes
the connection.
Table 22:
IEC 60870-5-104 suspended time-out
Description
Value
Type
Timeout
Units
Seconds
Value range
1...65000
Note
Using this parameter makes it easier to detect
partially closed network connections, especially
in the UDP mode
Max sequence number
defines the maximum sequence number used in IEC
60870-5-104 communication. The value “0” selects the standard value “32767”.
Table 23:
Max sequence number
Description
Value
Type
Sequence number
Units
Packets
Value range
1...32767
Note
0 = 32767 as suggested by the IEC 60870-5-104
standard
1MRS757105 B
Section 5
RER601/603 Configurator
RER601/603
51
Technical Manual