In summary
1. The keypad is in function mode unless a display digit is flashing.
2. The flashing digit is changed when a numeric key is pressed.
3. The number is entered by pressing
ENTER.
3.8
CMD Functions
CMD functions control the service mode, change the password on the
setpoint, allow control of the computer interface, and implement
special features. Each CMD function consists of four digits (Figure 3-
3). CMD functions are entered using the numeric mode as described in
Subsection 3.7. See Subsection 3.13 for a list of CMD functions.
If the CMD mode has been accidentally entered, input a value of 0000
to exit it. This value has no effect on the system.
Function Class
0 = Service Mode
1 = System Mode
2 = Setpoint Commands
3 = Computer lnerface Commands
8
�-Function Parameter
Function
Figure 3-3. LED Display for CMD Functions
3.9
Setpoint Option
Fixed setpoint
Setpoint allows you to control processor pressure-related functions.
The three setpoints (two user adjustable and one fixed) have a set of
NC (Normally Closed)/C (Common)/NO (Normally Open) contacts.
Note
On SPI & SP2,
the fourth digit is not used and must be set to 0.
Please note that
SPI SP2
are independent. This means that you
could program SPl for pressure and password protection while
SP2 operates on current and may be altered without a password.
Typically the C contact in a fixed setpoint is switched to NC, but when
output voltage exceeds 2000V, C switches to NO. This setpoint can be
wired to an alarm, or system interlock to sound an alarm or shut the
system down in the event of a pump malfunction. Note that C switches
to NC if pressure is excessively high, pump or high voltage electrical
system short circuits, or the DIGITEL fails to generate high voltage
because of a failure, standby command, or loss of main input power.
Operation
3-11
