D.4
SEL-2414 Transformer Monitor Instruction Manual Date Code 20130214
DNP3 Communications
DNP3 in the SEL-2414
time synchronization messages.) It can be set to request time synchronization
periodically by setting the TIMERQn setting to the desired period. It can also be
set to not request, but accept time synchronization (TIMERQn = M).
Modem Support
The device DNP implementation includes modem support for serial ports. Your
DNP3 master can dial-in to the device and establish a DNP3 connection. The
device can automatically dial out and deliver unsolicited DNP3 event data.
When the device dials out, it waits for the “CONNECT” message from the local
modem and for assertion of the device CTS line before continuing the DNP trans-
action. This requires a connection from the modem DCD to the device CTS line.
NOTE: RTS/CTS hardware flow
control is not available for a DNP3
modem connection. You must use
either X-ON/X-OFF software flow
control or set the port data speed
slower than the effective data rate of
the modem.
You can either connect the modem to a computer and configure it before connect-
ing it to the device, or program the appropriate modem setup string in the modem
startup string setting MSTR. You should use the PH_NUM1 and (optional)
PH_NUM2 settings to set the phone numbers that you want the device to call.
The device will automatically send the ATDT modem dial command and then the
contents of the PH_NUM1 setting when dialing the modem. If PH_NUM2 is set,
the RETRY1 setting is used to configure the number of times the device tries to
dial PH_NUM1 before dialing PH_NUM2. Similarly, the RETRY2 setting is the
number of attempts the device tries to dial PH_NUM2 before trying PH_NUM1.
MDTIME sets the length of time from initiating the call to declaring it failed
because of no connection, and MDRET sets the time between dial-out attempts.
The settings PH_NUM1 and PH_NUM2 must conform to the AT modem com-
mand set dialing string standard.
DNP3 Settings
The DNP3 port configuration settings available on the device are shown in Port
Settings (SET P Command) on page SET.24. You can enable DNP3 on Ethernet
Port 1 or on any of the serial Ports 2 through 4, up to a maximum of three concur-
rent DNP3 sessions. Each session defines the characteristics of the connected
DNP3 Master, to which you assign one of the three available custom maps. Some
settings only apply to DNP3 LAN/WAN, and are visible only when configuring
the Ethernet Port. For example, you only have the ability to define multiple ses-
sions on port 1, the ethernet port. Likewise, settings applicable to serial DNP3 are
visible only when configuring a serial port.
Configurable Data
Mapping
One of the most powerful features of the Transformer Monitor implementation is
the ability to remap DNP3 data and, for analog values, specify per-point scaling
and dead bands. Dead bands are applied to the scaled value. Remapping is the
process of selecting data from the reference map and organizing it into a data
subset optimized for your application. The Transformer Monitor uses object and
point labels, rather than point indices, to streamline the remapping process. This
enables you to quickly create a custom map without having to search for each
point index in a large reference map.
You may use any of the three available DNP3 maps simultaneously with up to
three unique DNP3 masters. Each map is initially populated with default data
points, as described in Default Data Map on page D.11.
Device Profile
Table D.4 contains the standard DNP3 device profile information. Rather than
check boxes in the example Device Profile in the DNP3 Subset Definitions, only
the relevant selections are shown.
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