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UPS Network Management Card 2 User’s Guide40
Use the Force Negotiation option to re-gauge the time when you change or add a PCNS client. When you
choose it and click Apply, the procedure is automatic; the details are discussed below.
PCNS starts with the NMC Low Battery Duration value, compares it to its own shutdown time and, if the
battery duration time is too low, tells the NMC to increase the values in #1 and #2 below to the
PCNS
SHUTDOWN REQUIRED TIME* plus 70 sec.
1.Without outlet groups, the Maximum Required Delay.
2.With outlet groups, the Power Off Delay for the outlet group supplying power to the PCNS client.
*The
PCNS SHUTDOWN REQUIRED TIME = the shutdown delay + the shutdown command duration.
When the default of 70 seconds is added, the time is always rounded up to nearest minute. E.g., a
total here of 3 min 50 sec is rounded up to 4 min; a total of 2 min is still rounded up to 3 min.
Notes:
The 70 sec. mentioned is the default OS shutdown time for PCNS.
PCNS never changes the NMC Low Battery Duration field value.
With PCNS v3.x, the Maximum Required Delay value is never used by the NMC for a UPS with
outlet groups.
The general option
Path: UPS > Configuration > general
Settings vary by UPS model. Each UPS model supports only some of the following:
Setting Definition
UPS Name A name to identify the UPS.
UPS Position The physical orientation of the UPS, rack or tower.
Audible Alarm
Enable or disable the audible alarm of the UPS, and, for some UPS models,
define the condition that will cause the alarm to sound.
Force Negotiation: UPS without outlet groups
IF THEN
PCNS Req.
Shutdown
Time
NMC
Low Battery Duration
Max. Req. Delay
for the PCNS is
increased
to equal
PCNS Req.
Shutdown
Time
sec
Force Negotiation: UPS WITH outlet groups
IF THEN
PCNS Req.
Shutdown
Time
NMC
Low Battery Duration
Power Off Delay
for the PCNS outlet
group is increased
to equal
PCNS Req.
Shutdown
Time
sec