4
3. No communication over the RS-485 interface
Flashes once per second
4. Self-diagnostic mode
Flashes five times per second
5. Updating software or program memory failure
Flashes twice per second
1.4.4.1 While operating, the module monitors the voltage at its power inputs and,
depending on the given value of
Both Power Inputs Monitoring
parameter (see
Clause 1.4.6), automatically detects a failure.
Setting
Both Power Inputs Monitoring
on means that the power voltage should be applied
to both power inputs; and the module enters the Power Failure mode if the power voltage is
out of the normal range at any power input. In this case the module generates one Power
Failure message for this power input (1 or 2) and another Power Failure message for the
module itself (input number = 0). READY indicator shall flash with low duty cycle ratio. The
module will return to the quiescent mode when the power is restored on the both inputs, and
after that the module transmits the Power Restored message over the RS-485 interface bus.
If, otherwise,
Both Power Inputs Monitoring
is set off, the power voltage can be applied to
any of the power inputs. The module enters the Power Failure mode only in case of power
failure at both power inputs and returns to the quiescent mode when the voltage is restored at
any of them. The events Power Failure and Power Restored are generated only for the
module itself (input number = 0).
1.4.4.2 If data are not communicated over the RS-485 interface within 1 s, the READY
indicator begins flashing once per second (provided that the power voltage is in norm). When
communication is restored the indicator is lit steady.
1.4.5 Statuses of relays are displayed by indicators 1 to 4. When a relay is switched off
(that is, normally closed contacts NC and COM are closed while normally open contacts NO
and COM are open), the relevant indicator is off too. When the relay is switched on (that is,
normally closed contacts NC and COM are open while normally open contacts NO and COM
are closed), the relevant indicator is on.
1.4.6 To be adjusted for specific operation requirements, the module supports
programming the following parameters stored in its non-volatile memory:
Parameter
Description
Value
Range
Factory Value
1. Initial
Condition
The executive program,
executed automatically after
powering on (or resetting) the
module and on receiving a
Return to Initial Condition
command
1
(On),
2
(Off),
9
(Lamp),
10
(Alarm
Output)
relay 1
relay 2
relay 3
relay 4
2
(Off)
2
(Off)
2
(Off)
2
(Off)
2. Activation
Time
The time during which the
relay is active, for the
commands which imply a
limited activation time, if this
time is not received in the
command explicitly
0…255
s
relay 1
relay 2
relay 3
relay 4
60 s
60 s
60 s
60 s
