Schweitzer Engineering SEL-2032, Instruction Manual

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2.10
SEL-2032 Communications Processor Instruction Manual Date Code 20120126
Installation
Communications
Master Device
to SEL-2032
Communication
Some Master devices, such as RTUs, cannot accept unsolicited messages,
requiring that they only receive a response to a request they send. When you
interface the SEL-2032 with such a device, you must make sure that the
SEL-2032 does not send any auto-messages to the device unless the SEL-2032
first receives a request. Use the
SET U command to create user-defined
commands that will trigger the appropriate auto-message response.
You must use the same precaution when you interface the SEL-2032 with a
master device using the LMD protocol.
Passwords
WARNING:
This device is
shipped with default passwords.
Default passwords should be
changed to private passwords at
installation. Failure to change each
default password to a private
password may allow unauthorized
access. SEL shall not be responsible
for any damage resulting from
unauthorized access.
!
You can set your own passwords with the PASSWORD command, or you can
disable the password protection with jumper selection (see Table 2.1 ). See
Example 1: Connect to the Front Port and Change Default Passwords on
page 3.1
for more information on access levels and password control.
Data
Collection Periods
You can set the SEL-2032 to collect data from attached devices on an
exception basis, i.e., only when an event occurs, and you can set the SEL-2032
to collect data on a regular, periodic basis. Each SEL-2032 port collects data
independently, based on your settings, and you can set each port to collect data
in different ways using separate message trigger conditions and data request
messages. Likewise, each SEL-2032 port responds to requests for data
independently, based on your settings. In either case, the SEL-2032 will not
issue or respond to another request for data on the same port until the previous
request has been satisfied. If the data response has not been completed before
the same message trigger condition occurs again, the second trigger will be
missed completely. The SEL-2032 will acknowledge this missed trigger by
setting a delay bit in the port register, which is reported in the SEL-2032 status
report.
Although both exception and periodic data collection can encounter this type
of delay, you can control the periodic collection period, and thereby minimize
the possibility of collection delays and missed triggers. You should consider
first if the attached device is capable of transferring data in binary format or
only in ASCII character format, and second, the type of data you plan to
request, i.e., meter, target, demand, or another type.
When connecting to SEL-100 and SEL-200 series relays that have Fast Meter
binary data capability, always connect to Port 2 on the relay. Binary data
transfer is not supported on Port 1 of these relays.
Courtesy of NationalSwitchgear.com