Date Code 20010518 Settings 6-25
SEL-2020 Instruction Manual
Table 6.11: SET A Automatic Message Settings Information
Setting Comment
AUTOBUF
Prompt. Save unsolicited messages (Y/N).
Description. You enter Y (Yes) to save unsolicited messages received by the SEL-2020.
Ports configured for IEDs can buffer unsolicited messages. User-defined commands will
work regardless of this setting. Not available for Master or Printer.
STARTUP
Prompt. Port startup string.
Description. You enter a startup string for the device attached to this port. The startup
string supports devices that need some initialization on power-up. When the SEL-2020 is
powered-up, these startup messages will be transmitted. Typically, this string is used on
SEL relays that need to be at Access Level 1 or Access Level 2 for automatic data
collection by the SEL-2020. Not available for Master ports.
The startup string is sent:
• When you accept setting changes after the SWAP or COPY commands.
• At power-up.
• When an inactive port becomes active.
• When you accept SET A setting changes.
SEND_OPER
Prompt: Send operate command on logic bit transition (Y/N/YP).
Description: Use this setting to enable automated control of the attached SEL device. The
YP selection indicates that Remote Bits should always be pulsed. See the following
subsection, Automated Control, for more information.
MSG_CNT
Prompt. How many auto-message sequences (0-12).
Description. You enter the number of the auto-message(s) you wish to use. Messages 1 to
8 have an associated data area to store responses, messages 9 to 12 are for messages only.
PRINT_ALL
Prompt. Print all unsolicited messages (Y/N).
Description. You set to Y (Yes) to print all unsolicited messages received by the
SEL-2020 to a Printer port. Only those messages received on ports that have
AUTOBUF=Y will be printed. The PRINT_ALL prompt only appears on ports with a
DEVICE = P for printer. This setting occupies the Message 1 position. You can create
more selective printing functions using SEL
OGIC Control Equations and message strings on
other message functions.
CLEAR_BUF
Prompt. Clear unsolicited message buffer after print (Y/N).
Description. You set to Y (Yes) to clear the unsolicited message buffer after printing.
Only applies to Printer ports.
Note: Up to twelve auto-messages may be defined using the ISSUEx and MESGx settings. The first eight
may have their responses parsed using the PARSEx setting.
ISSUE1-12
Prompt. Item 1-12 trigger.
Description. You enter the trigger condition as a SEL
OGIC Control Equation that triggers
the associated message. ISSUE1 triggers MESG1, ISSUE2 triggers MESG2, etc. See
Section 7: SELOGIC Control Equations for instructions on developing these trigger
conditions. There is a 200 character per equation limit for a single equation and a 50 term
(element names and time functions) limit per equation.
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