7.8
SEL-2032
Communications Processor
Instruction Manual
Date Code 20120126
Settings
Port Configuration (SET P) and Communication Settings
When you connect an SEL device to the SEL-2032, use 9600 or 19200 bps
when performing the auto-configuration. If your application requires
communications at lower data rates, connect the devices before installation
and perform the auto-configuration at 9600 bps. After auto-configuration is
complete, install the SEL-2032 and devices and set to a lower data rate.
If auto-configuration fails, it may indicate that the connected device is not
recognized, that there is a communication problem between the devices, or
that the connected device was slow to respond. Check for any obvious
problems with the connection, then reattempt auto-configuration. If auto-
configuration still fails, attempt to gain transparent communications with the
device using PORT
n
. If this does not succeed, there is a communication
problem. If you can connect transparently, but auto-configuration still fails,
there probably is an incompatibility between the connected device and the
SEL-2032. If this happens, contact the factory for further assistance.
When auto-configuration is complete, the SEL-2032 displays a summary of
the collected information. It is important to examine this summary and verify
that it is as expected. Communications problems could cause the auto-
configuration to be incomplete without causing an auto-configuration error.
On power up, the SEL-2032 uses the firmware ID (FID) collected for each
port to verify that the connected device has not been replaced with a different
device. If the device has changed (or had newer firmware installed), the
SEL-2032 flags the port as “CONFIG FAIL” status and stops communicating
with the device. You can prevent unexpected communications loss on power
up by following the procedure in
Relay Firmware Upgrades on page 10.6
Transparent
Communications
Transparent communications allow a master device to communicate directly
with an IED or printer through the SEL-2032. You enter the transparent
communications mode using the
PORT
command from the SEL-2032
command set or using a special user-defined command string you set with the
TRANS setting (see
SET U
subsection in this section).
Broadcast communications are similar to transparent communications, except
that a master port communicates with multiple IEDs simultaneously.
Broadcast communications can only be entered using the
BROADCAST
command.
When you connect to an SEL IED, the SEL-2032 automatically issues a
QUIT
command to the SEL IED before completing the connection. This way,
initial access to the SEL IED will be at Level 0, requiring the user to know the
relay password(s) in order to access it. When the transparent connection is
terminated, the SEL-2032 reissues the STARTUP string to restore the SEL
IED to the necessary access level for data collection and control.
While you are transparently communicating through the SEL-2032, Fast
Meter and Fast Message binary data continue to be collected and Fast Operate
control operations continue to be sent. If you attempt a Fast Meter or Fast
Operate request via the transparent connection, your request and the automatic
request may collide, leading to neither taking place. If you plan to use Fast
Meter or Fast Operate commands while transparently connected, you should
disable any automatic Fast Meter collection and Fast Operate control to avoid
these collisions.
The SEL-2032 requires a three-step procedure to terminate transparent
communications. This three-step procedure helps ensure that transparent
mode is not accidentally terminated by normal data communications. The
three-step process includes an initial channel idle time (set with TERTIME1),
a termination character sequence (set with TERSTRING), and a second
Summary of Contents for SEL-2032
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