ABB ETL600 - Page 334

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A EN 4/28
1KHW001495-EN
C.2 Power supply for channel rack P7LA
Check the auxiliary supply voltage. In case of 80 W units, the supply voltage for both the upper
rack and lower rack must be checked.
There is no access to the internal DC voltages generated for the equipment. However in case
these voltages are outside their limit, it will be indicated by a hardware alarm.
C.3 Connect to equipment, upload configuration
The equipment is accessed by the HMI600 using a 1:1 serial RS-232 cable between the
P4LT/P4LU and COM port of PC. The equipment identification and necessary channel settings are
noted.
1. Start the HMI600, open the preconfigured file and connect to the equipment as described
in the instruction manual, 1KHW001489, chapter 4, section ‘Communication to the
ETL600’.
2. On the File menu click New. This opens the Connect dialog box.
3. Click Logon, Equipment ID, with ID 0.
4. Click Read & Write access
5. Click Upload configuration
6. Click OK. This opens a HMI600 child window.
C.4 Change configuration, if necessary
In case of configuration parameters have to be changed, refer to of the instruction manual,
1KHW001489, chapter 5 'Configuration and Set-up'.
C.4.1 Reducing Output Power, if necessary
At step C.1.1, return loss of line was determined in the used frequency range. The smallest (e.g.
worst) value of the return loss in the used frequency range is noted as A
r min
.
If the return loss of line is worse than 12 dB, output power must be reduced. Only in this case:
1. Calculate the reduction of output power, noted as A
red
4
3
minr
red
A
A −=
,
A
r min
and A
red
in [dB].
2. Determine the new value for max output power by using the table:
Equipment type Max output power reduced:
ETL640, 40 W Max power (PEP) = 46 dBm - A
red
ETL680, 80 W Max power (PEP) = 49 dBm - A
red
3. On the Configuration menu click System... and then click the Channel settings tab.
Enter the new value in the Max. power (PEP) field.
4. Click OK.
5. On the Equipment menu click Download configuration
6. Store configuration to the flash eprom. On the Equipment menu click Store
configuration to FLASH. Answer all dialogs with Yes or OK.