GE L90 Instruction Manual page 275

CHAPTER 5: SETTINGS
5.3.4.16 IEC 60870-5-103 protocol
SETTINGS  PRODUCT SETUP  COMMUNICATIONS  IEC 60870-5-103
 IEC103
 PROTOCOL
The L90 is provided with optional IEC 60870-5-103 communications capability. This feature is specified as a
software option at the time of ordering. See the Order Codes section in chapter 2 for details.
IEC 60870-5-103 is a companion standard to the IEC 60870-5 suite of standards for transmission protocols. It defines
messages and procedures for interoperability between protection equipment and devices of a control system in a
substation for communicating on a serial line.
The IEC 60870-5-103 protocol is enabled when the
is set to IEC 60870-5-103.
The IEC 60870-5-103 is an unbalanced (master-slave) protocol for coded-bit serial communication, exchanging
information with a control system. In the context of this protocol, the protection equipment is the slave and the control
system is the master. The communication is based on a point-to-point principle. The master must be able to interpret the
IEC 60870-5-103 communication messages.
The UR implementation of IEC 60870-5-103 consists of the following functions:
• Report binary inputs
• Report analog values (measurands)
• Commands
• Time synchronization
The RS485 port supports IEC 60870-5-103.
The UR Family Communications Guide contains more information on the protocol.
IEC103 COMMON ADDRESS OF ASDU
254. This ID does not need to be in sequential order for all stations that communicate with a controller, but it is
recommended. Note that RS485 only allows a maximum of 32 slave stations on a communication line, so the entire range
of 254 addresses is never exhausted.
— This setting defines the time that the L90 waits for a synchronization message. The L90
IEC103 SYNC TIMEOUT
synchronizes its clock using all available sources, with the source synching more frequently overwriting the time of the
other sources. Since the synchronization message received from the IEC 60870-5-103 master is less frequent than IRIG-B,
PTP, or SNTP, its time is overwritten by these three sources, if any of them is active. If the synchronization timeout occurs
and none of IRIG-B, PTP, or SNTP is active, the L90 sets the invalid bit in the time stamp of a time-tagged message.
The settings for the remaining menus are outlined as follows.
SETTINGS  PRODUCT SETUP  COMMUNICATIONS  IEC 60870-5-103  IEC103 INPUTS BINARY
 IEC103 INPUTS
 BINARY
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
IEC103 COMMON

ADDRESS OF ASDU: 0
IEC103 SYNC TIMEOUT:

1
 IEC103 INPUTS

 BINARY
 IEC103 INPUTS

 MEASURANDS
 IEC103 COMMANDS


SETTINGS  PRODUCT SETUP  COMMUNICATIONS  PROTOCOL
— This setting uniquely defines this L90 on the serial line. Select an ID between 0 and
 POINT 0


Range: 0 to 254 in steps of 1
Range: 1 to 1440 min in steps of 1
See below
See below
See below
See below
PRODUCT SETUP
setting
5
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