3.6 Control of Power Supply by a PLC-Based System Controller
Section 3: Power Supply Operation
CV-6SLX User Manual
0101-8242-0, Rev. C
3-10
2.
Assuming that the reset attempt is successful, the HV can then be switched on again. On
units without a remote controller, the HV ON contact must be supplied via Pins 8 and 9 of
HVPS rear panel connector J4 (see Table 2-1).
If this sequence of operations fails to restart the HV, refer to Table 5-5 for troubleshooting
instructions.
Adjusting the High Voltage Level
If the REM/LOC IN signal supplied via J4 Pin 5 is low, the operator can adjust the HV by using a
screwdriver to turn the OUTPUT KV ADJUST pot on the HVPS front panel (see Figure 3-1). If the
REM/LOC IN signal is high, the external control system can adjust the HV by varying the HV SET
IN input, which is supplied via Pin 1 of power module rear panel connector J4 (see Table 2-1).
Switching Off the High Voltage
The high voltage is automatically switched off if:
•
any internal or external interlock is no longer made
•
the power supply goes into an HV Out Of Regulation state
•
a latching Power Supply Fault occurs.
If the REM/LOC IN signal supplied via J4 Pin 5 is low, the operator can switch off the HV by
pressing the HV OFF button on the HVPS front panel (see (see Figure 3-1).
If the REM/LOC IN signal is high, the external control system can switch off the high voltage in
either of two ways:
1.
The control system can momentarily de-assert the HV ON contact supplied via Pins 8-9 of
HVPS connector J4 (see Table 2-1).
2.
The control system can assert the HV OFF contact supplied via Pin 17-18 of HVPS rear panel
connector J3.
3.6.3 Switching the Filament Current On/Off
NOTE
In order for the filament current to be switched on, the FPS module’s power cable must be properly
connected to a source of 220-V ac power, and the module’s ON/OFF switch must be in the ON position.
Switching On the Filament Current
The gun (i.e., filament current) can be switched on only by an externally supplied GUN GO ON
signal, which must be applied via Pin 15 of FPS front panel connector J101 (see Table 2-2).
Once HV and gun are both switched on, the emission current will ramp up to requested level
after a 10–15 second delay.
Switching Off the Filament Current
In order for the filament current to be switched off, the GUN GO ON IN signal supplied via Pin
15 of FPS front panel connector J101 (see Table 2-2) must be de-asserted.
