4.10
SEL-2032 Communications Processor Instruction Manual Date Code 20120126
SELOGIC Control Equations
Communications and Triggered Messages
Communications and Triggered Messages
Whenever the SEL-2032 transmits a triggered message to an IED on one of its ports,
it increments the LOCAL:NUM_MESG message counter in the database. If the
SEL-2032 does not receive a response to the triggered message, it will set the port
status to Inactive (bit 5 of LOCAL:PORT_STATUS and LOCAL:INAC) and
increment the LOCAL:BAD_MESG message counter in the database. If, while the
port status is Inactive, the SEL-2032 transmits ten consecutive messages without
receiving a response, it will also set port status to Port Communication FAIL (bit 10
of LOCAL:PORT_STATUS). If PARSEx = IGNORE and the SEL-2032 does not
receive a response to a transmitted message, it will not set port status to Inactive, nor
increment the LOCAL:BAD_MESG message counter in the database.
If the port device type, DEVICE = OTHER or SEL, the SEL-2032 will
transmit every triggered message regardless of the port status. In general, the
SEL-2032 will only retransmit a message if it has been retriggered. However,
if the triggered message is a Binary 20message, e.g., Binary 20METER, or
SEL Fast Message Read (such as 20ENERGY), and port status is Inactive, the
SEL-2032 will retransmit the message until it reestablishes communication
with the IED. Furthermore, if the device type is DEVICE = SEL and port
status is Inactive, for each triggered user-defined message or ASCII
20message, (e.g., ASCII 20METER) message, the SEL-2032 will also
transmit a CR/LF (Carriage Return with Linefeed).
For DEVICE = SEL IED, if an ASCII Operate or a Fast (Binary) Operate is
triggered while the port status is Inactive, the Operate is issued and the trigger is
cleared. The SEL-2032 will retransmit the Operate only if it has been retriggered.
The SEL-2032 will clear the Port Inactive and Communication FAIL statuses
if any of the following occurs:
If the port DEVICE = OTHER IED,
➤ The SEL-2032 receives a response of at least one character,
PARS Ex is not set to IGNORE, and it can successfully parse
the response from the IED.
➤ The SEL-2032 receives a response of at least one character and
the PARSEx is set to IGNORE. Conversely, if the PARSEx is
set to IGNORE and the IED does not respond with at least one
character, the port Inactive and Communication FAIL statuses
will not be cleared.
➤ The SEL-2032 receives an unsolicited response of at least one
character.
If the port DEVICE = SEL IED,
➤ The SEL-2032 successfully performs a binary data collection
such as a 20METER or 20DEMAND.
Note: If the SEL-2032 issues an Enable/Disable Unsolicited
SER message and does not receive a response, the port status
will remain unchanged.
➤ The SEL-2032 receives an unsolicited response of at least one
character.
Whenever the port Inactive status is cleared, the SEL-2032 will transmit the
contents of the STARTUP string.
Courtesy of NationalSwitchgear.com
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