Iec60870-5-101 Settings - Siemens 7SR224 Technical Manual

2.1.2

IEC60870-5-101 Settings

The following relay settings are provided for configuration of the IEC60870-5-101 implementation when available
and are common to all ports using this protocol.
Setting name Range
Balanced, Unbalanced
I101 Link Mode
Not Present, 1 Octet, 2
I101 Link Address
Octets
Field
I101 Common Address
1 Octet, 2 Octets
of ASDU
I101 Cause of Trans
1 Octet, 2 Octets
(COT)
1 Octet, 2 Octets, 3
I101 Info Obj Add (IOA)
Octets
0 .. 65535
I101 ASDU Address
Off, 1 ..3600 seconds
I101 Cyclic Period
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Default Setting
Unbalanced As Required
1 Octet As Required
2 Octet As Required
1 Octet As Required
2 Octet As Required
3 As Required
60 Seconds As Required
7SR224 Argus Data Comms
Notes
Balanced transmission is
used for point to point
connection to one device.
The controlled station
(slave) may send link
messages at any time.
Unbalanced transmission
is used for multi-drop
connection, e.g. RS485,
to one or more devices.
The controlling station
(master) send class 1
and 2 polls to each slave
station.
Size of link address in
octets.
Not Present – Only used
with balanced
transmission.
1 octet address range 0 –
254
2 octets address range 0
- 65534
Size of common address
in octets.
1 octet address range 0 –
254
2 octets address range 0
- 65534
Size of cause of
transmission in octets.
1 octet – COT code
2 octets – COT code +
originator address or 0.
Size of Info Object
address in octets.
1 octet address range 1 –
255
2 octets address range 1
– 65535
3 octets used to generate
structured address
format.
Address to use to identify
ASDU layer
Period device will
generate cyclic data. Set
to Off to disable
generating of cyclic data.
Only data points with the
cyclic flag set will be
generated cyclically.
Chapter 4 Page 5 of 76