Fuji Electric RHC-D 690V Series, Руководство пользователя

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9.7.8 Protection functions
• When an alarm occurs for some reason at even a single converter unit of a parallel
system comprising two or more units, there will be insufficient capacity even when
continuing operation with the remaining unit(s), resulting in cases where the machine
system is unable to function normally. To eliminate such cases, an instantaneous (within
several ms) alarm occurs at all units in the parallel system connected by optical link
option. Furthermore, it is also necessary for the customer to create sequences that stop all
units using 30X (batch alarm output).
• After the converter protection function has activated and the cause of the alarm has been
eliminated, converters are restarted by resetting the alarms with the run command ON.
There is a risk of injury, and therefore alarms should be reset only after ensuring that the
run command is OFF (open).
• If the optic fiber cable connecting units is cut or damaged during converter operation,
normal operation will no longer possible, and so an alarm (converter link error: Erb)
status is forcibly triggered at the converter side. This alarm does not occur while
converters are stopped.
(1) Converter link error (Erb)
If the optic fiber cable is cut or damaged, or comes away from the connector during converter operation, a converter
link error (Erb) occurs, resulting in an alarm at all units. If converter alarm output is based on inverter external alarm
conditions, an alarm trip condition also occurs at the inverter, resulting in a free-run stop.
The alarm status cannot be cleared even by inputting a reset command (via keypad, terminal block or communication
system) if the cause of the alarm has not been eliminated. Always reset the alarm status after investigating the cause
of the alarm.
"Erb" troubleshooting
The following causes are likely when an Erb alarm occurs.
(1) The optic fiber cable is not connected, or the connector has not been fully inserted.
(2) The optic fiber cable is twisted with a curvature of less than 35 mm, or the cable is bent.
(3) The optic fiber cable connection plug does not match the color (blue, gray) of the PCB connector.
(4) The optic fiber cable connection does not form a loop. Always ensure that signals from the master are looped
back.
(5) Strong light (e.g., flashlight) is applied to the optical fiber.
(2) Operation procedure error (Er6)
An alarm occurs when the hardware switches are incorrectly set as follows.
• When optical link option hardware station address SW1 is set to 6 or higher.
• When the optical link option hardware station address SW1 setting is greater than H13 "No. of parallel system
slave stations".
When equipped with two optical link options.
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