Murphy EMS-GC10, Operator'S Manual

Page: 28 / 183

Section 75 00-02-0878
2013-03-07 - 22 -
Block Mode
Block mode can be enabled by pressing the MAN button on the EMS-GC10 twice and
hold for 2 seconds, with M-Logic or a digital input. When block mode is selected, the
controller unit will be locked for certain actions. This means that it cannot start the
genset or perform any breaker operations from the buttons.
The purpose of the block mode is to make sure that the genset does not start for
instance during maintenance work.
WARNING: You should take care to follow OSHA equipment
lockout requirements and any other company safety
regulations, procedures, or requirements by authorities with
local jurisdiction.
NOTE: It is important to know that the input configured to block
mode is a constant signal. So, when it is ON, the unit is in a
blocked state, and when it is OFF, it returns to the mode it was in
before block mode was selected.
When EMS-GC10 unit goes into block mode, it will:
•
Open GB, shut down the engine, show "BLOCK" in the display and
flash the MAN LED
•
GB ON, GB OFF, MB ON, MB OFF and START buttons are locked
•
Parameter 7065 set to Start Open MB: MB will switch on
every time voltage/frequency is within the limits and open when not
OK (used when the breaker is a contactor)
•
Parameter 7065 set to Start Engine: MB will switch ON one time if the
voltage/frequency is within the limits and OFF otherwise. It respects
the "MB close delay" in 7082.
If block mode is selected using the display after the digital block input is activated, the
EMS-GC10 will stay in block mode after the block input is deactivated. The block mode
must now be changed using the push-buttons AUTO or MAN. The block mode can only
be changed locally by push-button or a digital input.
IMPORTANT: Before the running mode is changed, it is
important to check that persons are clear of the genset and
that the genset is ready for operation.
NOTE: Alarms are not influenced by block mode selection.