Miteq D-9301, Operation And Maintenance Manual, Page: 33 / 86

3-14
3.3.2.9.2.10 Service Request
The converter will issue a service request (activate the SRQ
line) when one of the status alarm lines indicate a failure. The
IEEE 488 Controller responds by sending the SPE message (Serial
Poll) and addresses the unit to talk. The converter responds
with the following message:
Bit No.
7 6 5 4 3 2 1 0
0
1 0 0 0 S2 S1 S0
The S"n" bits indicate in binary code which component fault line
caused the service request (a = 0, b = 1, c = 2, etc.).
The IEEE 488 Controller may perform a Serial Poll without a
service request being generated by the converter (the request may
have been generated from another device on the bus). In this
case, the response will be the same message (the data field will
be the same as the last status word sent) however, bit 6 will be
at "0".
3.3.3 EMERGENCY OPERATION
In the event of a failure in converter components, refer to
Section 5.3 to determine possible cause/remedies.
3.3.4 SHUTDOWN PROCEDURE
The converter is completely shut down when the AC power is
removed.