Diagnostic Tools - Siemens 6RA7086-6KS22 Operating Instructions Manual

6ra70 series, microprocessor-based converters from 6kw to 2500kw for variable-speed dc drives, simoreg dc master

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Recommended circuit for connecting SCB1 to SCI1 and SCI2 using fiber optic cables:

If the 24 V voltage supply for an SCI slave fails which data are being exchanged between the

SCB1 and an SCI, then the "1" signal applied at a binary input is sent to the SCB1 or

SIMOREG as an "0" shortly before the power finally fails.

In contrast, the "1" remains applied in the SIMOREG in the event of an interruption in the fiber

optic connection.

If an external voltage (logical "1") has already been applied to a binary input when the electronics

supply voltage is switched on, this status will not be registered until the external voltage is

disconnected and reconnected again.

Diagnostic tools:

LED display on SCB1:

LED flashing

LED display on SCI1 or SCI2 slave:

LED flashing

Details about fault or alarm messages which may occur in relation to SCB1 or SCI (F070 to F079

and A049 and A050) can be found in Section 10.

Normal operation

12Hz frequency No telegram traffic (e.g. fiber optic cable not

5Hz frequency

0.5Hz frequency Normal operation

Faulty telegram traffic (e.g. fiber optic ring

interrupted or other slave has no supply

SIMOREG DC Master

Operating Instructions

6RX1700-0AD76

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