MSA SUPREMA - Page 52

REV 0, June 2005Page 52
Operation Manual SUPREMA
4. Operation of the System
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. Up to 256 configuration conditions per relay output are permitted. 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.
“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.
Normal (energised))
Field type: Selection
Set the operating mode for the selected relay output:
• Normally energised (Relay is energised)
When having been set, the relay driver output gives out a low signal (normally energised)
• Normally de-energised (Relay is de-energised)
When having been set, the relay driver output gives out a high signal (normally deenergised)
Tag
Field type: text
Enter a customer-specific designation for the selected relay output.