N1200HC Controller
NOVUS AUTOMATION
2/12
FUNCTION OF I/O
CODE
TYPE OF I/O
Without Function
OFF
Output
Output of Alarm 1
A1
Output
Output of Alarm 2
A2
Output
Output of Alarm 3
A3
Output
Output of Alarm 4
A4
Output
LBD -
Loop break detection
Lbd
Output
Control Output
1
(Relay or Digital Pulse)
(TR1
Output
Control Output
2
(Relay or Digital Pulse)
(TR2
Output
Automatic / Manual mode selection
mAN
Digital Input
Run / Stop mode selection
RVN
Digital Input
Remote SP selection
RSP
Digital Input
Program freezes
KPRG
Digital Input
Program 1 selection
PR 1
Digital Input
Control output
1
(0 to 20 mA)
(.0.20
Analogical Output
Control output
1
(4 to 20 mA)
(.4.20
Analogical Output
Control output
2
(0 to 20 mA)
2.0.20
Analogical Output
Control output
2
(4 to 20 mA)
2.4.20
Analogical Output
Retransmission of PV in 0 to 20 mA
P.0.20
Analogical Output
Retransmission of PV in 4 to 20 mA
P.4.20
Analogical Output
Retransmission of SP 0 to 20 mA
S.0.20
Analogical Output
Retransmission of SP 4 to 20 mA
S.4.20
Analogical Output
Table 2
- Types of functions for the I/O channels
During the configuration of the I/O channels, only the valid options for
each channel will be shown on the display. These functions are
described below:
•
off
- Without function
The I/O channel programmed with code off will not be used by the
controller. Although without function, this channel is available through
the serial communication as digital I/O (command 5 MODBUS).
•
a1
,
a2
,
a3
,
a4
- Alarm Outputs
Defines that the programmed I/O channel acts as alarm outputs.
Available for all the I/O channels.
•
Lbd
–
Loop break detector
function.
Assigns the output of the Loop Break Detector alarm to an I/O
channel. Available to all I/O channels.
•
(tr1
-
(tr2
-
Control
Defines the I/O channel to be used as the control output (relay or
digital pulse). Available for all the I/O channels. The digital pulse is
available on I/O5 or on I/O3 and I/O4 (when the DIO optional is
installed). Check the specifications of each channel.
•
mAn
- Digital Input with Auto/Manual function
Defines the I/O channel as Digital Input with the function of switching
the control mode between
Automatic and Manual
. Available on I/O5
or on I/O3 and I/O4 (when the DIO optional is installed).
Closed
= Manual control
Open
= Automatic
•
rvn
- Digital Input with RUN function
Defines channel as Digital Input with the function of
enabling/disabling the control and alarm outputs (
RvN
:
YES
/
no
).
Available for I/O5 or I/O3 and I/O4, when installed.
Closed
= outputs enabled
Open
= control and alarms output shut off
•
rsp
- Digital Input with Remote SP function
Defines channel as Digital Input with the function of selecting the
remote SP as the control setpoint. Available for I/O5 or I/O3 and
I/O4, when available.
Closed
= remote SP
Open
= uses main SP
•
kprg
- Digital Input with Hold Program function
Defines channel as Digital Input with the function of commanding the
execution of the selected setpoint profile
program
. Available for I/O5
or I/O3 and I/O4, when available.
Closed
= Enables execution of the program
Open
= Interrupts execution of the program
Note
: Even when the execution of the program is interrupted, the
control output remains active and controlling the process at the point
(Setpoint) of interruption. The program will resume its normal execution
starting from this same point when the digital input is closed.
•
Pr 1
- Digital Input with function to Execute Program 1
Defines the IO channel as Digital Input with the function of
commanding the execution of the setpoing profile
program 1
.
Available for I/O5 or I/O3 and I/O4, when available.
Useful function for switching between the main setpoint and a
secondary one defined by the
program 1
.
Closed
= selects program 1;
Open
= selects main
setpoint
•
(.0.20
-
(.4.20
– 0-20 / 4-20 mA control output 1
Set the channel to serve as control output 1, in analog mode.
Available for I/O 5 only.
•
2.0.20
-
2.4.20
- 0-20 / 4-20 mA control output 2
Set the channel to serve as control output 2 in analog mode.
Available for I/O 5 only.
•
P.0.20
– 0-20 mA PV retransmission
Set the channel to serve as Retransmission output of PV values.
Available for I/O 5 only.
•
P.4.20
– 4-20 mA PV retransmission
Set the channel to serve as Retransmission output of PV values.
Available for I/O 5 only.
•
s.0.20
– 0-20 mA SP (Setpoint) retransmission
Set the channel to serve as Retransmission output of SP values.
Available for I/O 5 only.
•
s.4.20
– 4-20 mA SP (Setpoint) retransmission
Set the channel to serve as Retransmission output of SP values.
Available for I/O 5 only.
CONFIGURATION OF ALARMS
The controller has 4 independent alarms. These alarms can be
configured to operate with nine different functions, as shown in
Table 3
.
•
off
– Alarms turned
off
.
•
ierr
– Open Sensor alarms – (
sensor break alarm
)
The open sensor alarm acts whenever the input sensor is broken or
badly connected.
•
rs
– Program Event Alarm
Configures the alarm to act in (a) specific segment(s) of the
programs of ramps and baselines to be created by the user.
•
lo
– Alarm of Absolute Minimum Value
Triggers when the value of measured PV is
below
the value defined
for alarm Setpoint.
•
ki
– Alarm of Absolute Maximum Value
Triggers when the value of measured PV is
above
the value defined
for alarm Setpoint.
•
dif
– Alarm of Differential Value
In this function the parameters
SPA1
,
SPA2
,
SPA3
and
SPA4
represent the Deviation of PV in relation to the SP.
Using the Alarm 1 as example: for Positive SPA1 values, the
Differential alarm triggers when the value of PV is
out
of the range
defined for:
(SP – SPA1) to (SP + SPA1)