Controller N1200
NOVUS AUTOMATION
2 / 13
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 (Relay or Digital Pulse)
CTRL
Output
Automatic / Manual mode selection
mAN
Digital Input
Run / Stop mode selection
RVN
Digital Input
Remote SP selection
RSP
Digital Input
Setpoint profile program HOLD (Freezes
program execution)
KPRG
Digital Input
Setpoint Profile Program 1 selection
PR 1
Digital Input
0 to 20 mA control output selection
(.0.20
Analogical Output
4 to 20 mA control output selection
(.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 in 0 to 20 mA
S.0.20
Analogical Output
Retransmission of SP in 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
The selected channel can be used as output to Alarms 1 to 4.
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.
(trL
– PWM Control Output
Defines the I/O channel to be used as the PWM control output (relay
or digital pulse). Available for all the I/O channels. The digital pulse is
available on I/O5 (standard) 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
(standard) or on I/O3 and I/O4 (when the DIO optional is installed).
Closed
= Manual control;
Open
= Automatic control
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 (freezes) 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
–0-20 mA Control Output
Available for I/O 5 only, defines the channel as a 0-20 mA control
output.
(.4.20 -
4-20 mA Control Output
Defines the channel as a 4-20 mA control output.
P.0.20
– 0-20 mA PV retransmission
Available for I/O 5 only, configures the channel to retransmit the
values of PV in 0-20 mA.
P.4.20
- 4-20 mA PV retransmission
Available for I/O 5 only, configures the channel to retransmit the
values of PV in 4-20 mA.
s.0.20 –
0-20 mA SP (Setpoint) retransmission
Available for I/O 5 only, configures the channel to retransmit the
values of SP in 0-20 mA.
s.4.20 –
4-20 mA SP (Setpoint) retransmission
Available for I/O 5 only, configures the channel to retransmit the
values of SP in 0-20 mA.
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 - (
Loop Break
)
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.
Rfai1
– Burnt-out Resistance Alarm - (
Heat Break
)
Signals that the heating element has broken up. This alarm function
requires the accessory Current transformer CT1. Details for use of the
option “burnt-out resistance” are found in the specific documentation
that accompanies the product whenever this option is requested.
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)
For a negative SPA1 value, the Differential alarm triggers when the
value of PV is
within
the range defined above:
difl
– Alarm of Minimum Differential Value
It triggers when the value of PV is below the defined point by:
(SP – SPA1)
