Himoinsa CEM7 - Page 24

CEM7 CONTROL UNIT INPUTS AND OUTPUTS | PAGE 24
• The control unit does not manage the disabling start up input (IA) or
it is not active.
• The control unit is not in lock mode programmed by time.
A delay in starting the genset can be congured through an external input via a
parameter (Regulations table, parameter 31).
TEST SIGNAL (TEST)
This function is only managed in automatic mode of the CEM7 control unit with
the motorised circuit breaker option.
The input congured as test (Settings table, parameter 11) allows a check of the
genset to be performed without activation of the load.
FORCED OPERATION (MFOR)
This function is only managed in automatic mode of the CEM7 control unit.
The input congured as forced operation (Settings table, parameter 12) complies
with anti-re regulations according to which it should not stop the operation of
the genset under any condition except overspeeding and emergency stop
(whether this is alarm, external start up disabling input or programmed block). It
is possible to congure 3 modes of forced operation (Regulations table,
parameter 25):
• 0: Forced operation not enabled. The process of forced operation is
not managed despite having an associated programmable input.
• 1: Starting due to network failure. Before activating the forced
operation input, the system waits for the start to occur due to a
programmed condition (alarms related to network signal, network
contactor failure, external start up...) needed to start the genset. To
stop the genset it is not sufcient that the start condition disappears,
but the input associated with the forced operation must be disabled.
• 2: Starting due to forced operation. Before activating the forced
operation input, the genset starts immediately without the need to wait
for any other start condition to occur. To stop the genset, it is necessary
to switch to manual operating mode and in this mode perform the stop
using the control unit keyboard. Predominating the stop button.
PROGRAMMABLE ALARMS (AL1, AL2 AND AL3)
5.2 PROGRAMMABLE INPUTS
The measurements module of the CEM7 control unit has 5 digital inputs (ENT1,
ENT2, ENT3, ENT4, ENT5) whose operation can be programmed. Moreover, the
analog inputs of the control unit P, T and TC can be congures to operate as
digital inputs (Regulations table, parameters 35, 36 and 37).
The programmable purpose inputs can be congured to behave as follows:
TARIFF WARNING SIGNAL (EJP1)
This function is only managed in automatic mode of the control unit CEM7 +
CEC7. The input congured as tariff warning (Settings table, parameter 7) starts
the genset after activating the corresponding input and after a set time (Times
table, parameter 9). Completion of the tariff ends when the input EJP1 is
disabled, stopping the engine with cooling.
TARIFF CHANGE SIGNAL (EJP2)
This function is only managed in automatic mode of the control unit CEM7 +
CEC7. The input congured as tariff change (Settings table, parameter 8)
activates the genset contactor provided that no fault is found in the genset.
DISABLING START UP SIGNAL (IA + ENT5)
This function is only managed in automatic mode of the CEM7 control unit. The
input congured as disabling start up (Settings table, parameter 9) prevents the
genset from starting under any starting condition except in the case of forced start
up operation (Settings table, parameter 12) congured as high priority (Regulations
table, parameter 25).
EXTERNAL START SIGNAL (AE + ENT4)
This function is only managed in automatic mode of the CEM7 control unit. The
input congured as external start (Settings table, parameter 10) forces the start
up of the genset if it is in automatic mode, provided none of the following
conditions are present disabling start up: