9 Communication
9.3 IEC 60870-5-104
190
SICAM MMU 7KG9663, Device Manual
E50417-H1040-C514-A3, Edition 01.2016
9.3
IEC 60870-5-104
The IEC 60870-5-104 protocol is also used for communication via the Ethernet interface. The IEC 60870-5-104
specification with a detailed explanation of the protocol is given in International Standard IEC 60870-5-104.
9.3.1
Function Range
9.3.2
Parameterization
9.3.3
Redundancy
SICAM MMU provides 2 redundancy methods which can be selected during parameterization
(see table 7-10):
•
Redundancy according to IEC 60870-5-104
•
Redundancy with equally privileged connections
If no redundancy method is selected (parameter
-none-
), redundancy is not possible.
The redundancy methods are characterized as follows:
NOTE
For information about IEC 60870-5-104 function range, see: http://powerquality.de,
pdf Document: “SICAM_MMU_104_CI_Guide_A1”.
NOTE
The parameterization of the IEC 60870-5-104 protocol is described in chapter 7.3.4.2.
Table 9-23
Redundancy Methods in the SICAM MMU
Properties
Redundancy according to
IEC 60870-5-104
Redundancy with equally
privileged connections
Number of supported connec-
tions
2
2
Number of started channels
(with StartTD)
1
The second channel can be con-
nected, but is stopped. Only test
telegrams are exchanged.
2 max.
Switching mechanisms in the
device
Yes
according to IEC 60870-5-104
normative
No
Both connections are equally privi-
leged and independent of each
other.
SICAM-MMU_7KG9663_US.book Page 190 Monday, December 7, 2015 12:22 PM