CHAPTER 5: SETTINGS PRODUCT SETUP
B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-93
5
IEC 60870-5-104 is a transmission protocol for network access, specifically for communication between a control station
and substation over a TCP/IP network.
The B90 supports the IEC 60870-5-104 protocol. This protocol is enabled when the
SETTINGS PRODUCT SETUP
COMMUNICATIONS PROTOCOL
setting is set to IEC 60870-5-104. The B90 can be used as an IEC 60870-5-104 slave device
connected to a maximum of two masters (usually either an RTU or a SCADA master station). Since the B90 maintains two
sets of IEC 60870-5-104 data change buffers, ideally no more than two masters actively communicate with the B90 at one
time.
The
IEC ------- DEFAULT THRESHOLD settings are used to determine when to trigger spontaneous responses containing
M_ME_NC_1 analog data. These settings group the B90 analog data into types: current, voltage, power, energy, and other.
Each setting represents the default threshold value for all M_ME_NC_1 analog points of that type. For example, to trigger
spontaneous responses from the B90 when any current values change by 15 A, the
IEC CURRENT DEFAULT THRESHOLD
setting is set to 15. Note that these settings are the default values of the deadbands. P_ME_NC_1 (parameter of measured
value, short floating point value) points can be used to change threshold values, from the default, for each individual
M_ME_NC_1 analog point. Whenever power is removed and re-applied to the B90, the default thresholds are in effect.
The
IEC REDUNDANCY setting decides whether multiple client connections are accepted or not. If redundancy is set to Yes,
two simultaneous connections can be active at any given time.
IEC TCP PORT NUMBER — To close the port, set the port number to 0. Any change takes effect when the B90 is restarted.
IEC COMMON ADDRESS OF ASDU — The change takes effect when the B90 is restarted.
IEC CYCLIC DATA PERIOD — The change takes effect when the B90 is restarted.
IEC COMMON ADDRESS
OF ASDU: 0
Range: 0 to 65535 in steps of 1
IEC CYCLIC DATA
PERIOD: 60 s
Range: 1 to 65535 s in steps of 1
IEC CURRENT DEFAULT
THRESHOLD: 30000
Range: 0 to 65535 in steps of 1
IEC VOLTAGE DEFAULT
THRESHOLD: 30000
Range: 0 to 65535 in steps of 1
IEC POWER DEFAULT
THRESHOLD: 30000
Range: 0 to 65535 in steps of 1
IEC ENERGY DEFAULT
THRESHOLD: 30000
Range: 0 to 65535 in steps of 1
IEC PF DEFAULT
THRESHOLD: 1.00
Range: 0.00 to 1.00
IEC OTHER DEFAULT
THRESHOLD: 30000
Range: 0 to 65535 in steps of 1
IEC REDUNDANCY
ENABLED: No
Range: No, Yes
The B90 relay does not support power metering. As such, the IEC POWER DEFAULT THRESHOLD setting is not
applicable.
The B90 relay does not support energy metering. As such, the
IEC ENERGY DEFAULT THRESHOLD setting is not
applicable.
Do not set more than one protocol to the same TCP/UDP port number, as this results in unreliable operation of
those protocols.
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