Woodward MRM4, Manual

Page: 425 / 460

Commissioning
The User MUST ENSURE that the relay output contacts operate normally
after maintenance is completed. If the relay output contacts do not operate
normally, the protective device WILL NOT provide protection.
For commissioning purposes or for maintenance, relay output contacts can be set by force.
Within this mode [Service/Test Mode (Prot inhibit)/WARNING! Cont?/Force RO], relay output contacts can be
set by force:
•
Permanent or
•
Via timeout.
If they are set with a timeout, they will keep their “Force Position” only as long as this timer runs. If the timer
expires, the relay will operate normally. If they are set as Permanent, they will keep the “Force Position”
continuously.
There are two options available:
•
Forcing a single relay » Force Rox« and
•
Forcing an entire group of relay output contacts » Force all Outs« .
Forcing an entire group takes precedence over forcing a single relay output contact!
A relay output contact will NOT follow a force command as long as it is
disarmed at the same time.
A relay output contact will follow a force command:
•
If it is not disarmed; and
•
If the Direct Command is applied to the relay(s).
Keep in mind, that the forcing of all relay output contacts (of the same
assembly group) takes precedence over the force command of a single
relay output contact.
Disarming the Relay Output Contacts
The parameters, their defaults, and setting ranges have to be taken from
the Relay Output Contacts section.
Principle – General Use
Within this mode [Service/Test Mode (Prot inhibit)/WARNING! Cont?/DISARMED], entire groups of relay output
contacts can be disabled. By means of this test mode, contact outputs switching actions of the relay output
contacts are prevented. If the relay output contacts are disarmed, maintenance actions can be carried out
without the risk of taking entire processes off-line.
The User MUST ENSURE that the relay output contacts are ARMED AGAIN
after maintenance is complete. If they are not armed, the protective device
WILL NOT provide protection.
EN MRM4 01/11 Page 425