3–4
239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL
CHAPTER 3: OPERATION
drops below the full load threshold and the ground current is below the trip pickup
setting.
•
COMMUNICATE: Status of the RS485 communication port is monitored with this
indicator. If there is no serial data being received via the rear serial port terminals
the
COMMUNICATE
indicator will be off. This situation will occur if there is no
connection, the serial wires have become disconnected or the master computer is
inactive. If there is activity on the serial port but the 239 is not receiving valid
messages for its internally programmed address the indicator will flash. This could
be caused by incorrect message format such as baud rate or framing, reversed
polarity of the two RS485 twisted pair connections or the master not sending the
currently programmed 239 address. If the 239 is being periodically addressed with
a valid message, the
COMMUNICATE
indicator will be on continuously. If no
valid message has been received for 10 seconds, the indicator will either flash
(serial data present) or go off (no serial data).
3.1.4
Keys
FIGURE 3–4: FRONT PANEL KEYS
•
SETPOINT: Setpoints are arranged into groups of related messages called setpoint
pages. Each time the
key is pressed, the display advances to the first
message of the next page of setpoints. Pressing the
key while in the
middle of a page of setpoints advances the display to the beginning of the next
page. The
and
keys are used to move between messages
within a page.
•
ACTUAL: Measured values and collected data messages are arranged into groups
of related messages called actual values pages. Each time the
key is
pressed, the display advances to the first message of the next page of actual
values. Pressing the
key while in the middle of a page of actual values
advances the display to the beginning of the next page. The
and
keys are used to move between messages within a page.
819764A4.CDR
RESET
STORE
ACTUAL
VALUE
MESSAGE
SETPOINT
SETPOINT
SETPOINT
MESSAGE
MESSAGE
ACTUAL
ACTUAL
MESSAGE
MESSAGE
Содержание Multilin 239
Страница 6: ...TOC 4 369 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL TABLE OF CONTENTS ...
Страница 20: ...1 14 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 1 OVERVIEW ...
Страница 48: ...3 10 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 3 OPERATION ...
Страница 96: ...4 58 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 4 PROGRAMMING ...
Страница 108: ...5 70 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 5 MONITORING ...
Страница 149: ...CHAPTER 7 TESTING 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL 7 111 FIGURE 7 2 239 Hardware Block Diagram ...
Страница 150: ...7 112 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER 7 TESTING ...
Страница 152: ...A 2 239 MOTOR PROTECTION RELAY INSTRUCTION MANUAL CHAPTER A ...