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参数资料
| 型号： | CG3020-9DB |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 3-OUTPUT 25 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 8/16页 |
| 文件大小： | 158K |
| 代理商： | CG3020-9DB |
Board Mountable
DC-DC Converters
G Series
Edition 1/06.2002
16/16
Programming of the Failure Reporting Mask
Should some failures not need to be reported to the /FAIL
line the user can send a serial message to the converter to
program a new Failure Report Mask (FRM).
To enter the programming mode the user should force
/SRQ to low state for at least T8 before sending the appro-
priate message (as e.g. according to figure:
Programming
of the FRM and table Bit code for programming the FRM),
by forcing /FAIL to low whenever needed whilst /SRQ is
kept low. The parameters for the serial reception are the
same as for transmission; (Baud rate 9600), one start bit
(low level), 8 data bits, one stop bit (high level). During the
whole transmission /SRQ needs to be kept low. The new
FRM will be used when /SRQ goes high.
After reception the converter will automatically send the
new FRM to the /FAIL line enabling the user to check the
newly programmed FRM. Should the converter consider
the reception incorrect the last valid FRM remains valid and
is returned to the user when /SRQ is taken high.
When the system is powered-up all bits of the FRM are high
(all failures reported).
Table 21: Bit code for programming the FRM
Bit
Failure reporting inhibited for
B0 = 0
Uo1 < low limit
B1 = 0
Uo1 > high limit
B2 = 0
Uo2 < low limit
B3 = 0
Uo2 > high limit
B4 = 0
Uo3 < low limit
B5 = 0
Uo3 > high limit
B6 = 0
overload condition
B7 = 0
malfunction of the converter
Fig. 29
Programming of the FRM.
ST B0 B1 B2 B3 B4 B5 B6 B7
S
/FAIL
/SRQ
T1
T1 = max 10
s
T8 = min 20
s
T3 = max 10
s
T9 = min 10
s
ST B0 B1 B2 B3 B4 B5 B6 B7
S
T3
Acknowledgement by converter
T9
T8
Sending FRM by user
11017
B
Fixing Holes
Case with fixing holes for extremely high vibration environ-
ments. (See:
Mechanical Data.)
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