Alpha Technologies
4
Communication
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4.3
Programming the UPS
The UPS’s 23-position Status/Self Test terminal block (Figure 1.3.9) can be programed to meet
your specifications with RS–232 communications. You can also use computer commands to
adjust the UPS’s date and time.
The UPS’s RS-232 commands run on a command line system. This program
does NOT recognize the backspace or delete keys even if appears that way
on the monitor. If you make a mistake and press ENTER, the unit echos the
command back exactly as you typed it. Press ENTER and retype the com-
mand again.
4.3.1 Programmable Status/Self Test Terminal Block
The functions of contacts C1 to C6 can be changed with RS-232 communications.
For example, to change contact C1:
1
To see how it is currently programmed, type
c1
(all lower case) and press
ENTER
.
2
The UPS responds with
*c1=1
where the * shows the unit responded to your command.
1 shows it is programmed to be the On Battery indicator (see the list below for the
functions).
0=Disabled
1=On Battery (onbat)
2=Low Battery (lobat)
3=Timer (timer)
4=Alarm (alarm) 5=Fault (fault)
3
To change the contact, type
c1=X
where X is 0 to 5 and press
ENTER
.
The UPS responds with
*c1=(0 to 5)
. The programming is done for that contact. Repeat as
need for the other contacts.
A contact can only be programmed for only one function at a time; it cannot
show multiple conditions.
To reset the relays to the factory default, type
default
and press
ENTER
. The unit responds with
*default
, showing it is reset. This command also sets the timer setting to the 2 hours factory
default (Section 4.3.2, “Timer
Contacts
Setting”).
