MSA SUPREMA - Page 55

REV 0, June 2005 Page 55
Operation Manual SUPREMA
4. Operation of the System
Al. 1-4 (1st-4th Alarm)
Field type: Check box
In this field, select the alarms that will cause the selected relay output to be activated, for the
input selected in the “Channel” field.
Fail
Field type: Check box
If this condition is set, the selected relay output is activated when an error (fault) occurs for the
input displayed in the “Channel” field.
Inhibit
Field type: Check box
If this condition is set, the selected relay output is activated when the input displayed in the
“Channel” field is inhibited.
Voting (Alarm Logic)
Field type: Integer
The value entered in this field applies to the configuration conditions described above. Optio-
nal status combinations (alarm, fail, and inhibit) can be formed when the selected relay output
is configured. The number value selected in this field determines how many of the conditions
configured in the control boxes must be met for the selected relay output to be activated. The
number of conditions entered in the check boxes is displayed in the field beside the voting to
be configured.
The following types of links can be formed in this manner:
Single link: (1-out-of-1):
Exactly one condition is set, and the value of 1 is entered as the voting.
Advise to multiply- links: At the creation of multiply-links the digital outputs with a
high number of links must be selected to the lower numbered (9–256) switch
outputs. After entering the links the system makes a link-calculation. The found
value shall be recorded in the logbook by the system after take over. If the value
of link-calculation exeed 63, a warning goes output. The system shall refuse a
value over 70, the user has to reduce the link settings.
“OR” link: (1-out-of-m)
Multiple conditions are set, and the value of 1 is entered as the voting, i.e., if any one or more
of the set conditions are met, the relay output will be activated. Parameters for a global alarm
or common alarms can be set in this manner.
“AND” link: (m-out-of-m)
The value entered for the voting corresponds to the number of set conditions, i.e. all of the set
conditions must be met for the relay output to be activated.
Voting link: (n-out-of-m)
If ‘m’ conditions are set, and the value of ‘n’ is entered as the voting, then the selected relay
output will only be activated if ‘n’ out of the ‘m’ conditions are met.