4-8 Protection
and
Control
BE1-CDS220
SG3
SG2
SG1
SG0
SGC
Load Current
as % of S0-51 <pickup>
40
30
20
10
100
90
80
70
60
50
120
110
140
130
150
SP-GROUP1=10, 0, 10, 50, 51P
10
10
SP-GROUP3=0,0,0,0,0
SP-GROUP2=0,0,0,0,0
0
90
80
70
60
50
40
30
20
10
100
TIME
(MINUTES)
0
(0.5A )
D2840-22
05-05-04
Figure 4-7. Automatic Operation Based on Cold Load Pickup
Logic Override of the Setting Group Control Function
Setting group selection can be overridden to allow manual setting group selection. Manual setting group
control and selection is achieved through HMI Screen 2.3, \CTRL\SG, or by using the CS/CO-GROUP
command. It cannot be achieved using BESTCOMS. The CS/CO-GROUP command uses select-before-
operate logic. A setting group must be selected using the CS-GROUP command before the setting group
is activated using the CO-GROUP command. The process of selecting and then placing a setting group in
operation is summarized in the following two paragraphs.
Use the CS-GROUP command to select the desired setting group. After the CS-GROUP command is
issued, the setting group can be activated using the CO-GROUP command during a 30-second window.
Use the CO-GROUP command to activate the setting group already selected. The setting group activated
with the CO-GROUP command must match the setting group selected with the CS-GROUP command. If
the setting group specified in each command does not match or the CO-GROUP command is not entered
during the 30-second window, the CO-GROUP command is blocked and an error message is returned.
CS/CO-GROUP commands are executed without having to use the EXIT command to save setting
changes.
When a setting group change is made, any subsequent setting change is blocked for two times the
duration of the SGC alarm output time setting. Refer to the Setting Groups subsection for more
information about SGC Alarm settings.
CS/CO-GROUP Command
Purpose:
Read or change logic override settings for setting group selection.
Syntax: GROUP[=<mode>]
Comments:
mode = Setting Group 0, 1, 2, 3, or L. L returns group control to the automatic setting
group logic. <mode> entry of CS-GROUP command and CO-GROUP command must
match or setting group selection will be rejected. If more than 30 seconds elapse after
issuing a CS-GROUP command, the CO-GROUP command will be rejected.
CS/CO-GROUP Command Examples:
Summary of Contents for BE1-CDS220
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