Dual Input Mode; Selection Of Process Value Related To The Command Output And To The Alarms; Remote Setpoint By Analogue Input; Remote Setpoint By Serial Input - Pixsys ATR244-12ABC Manual De Instalación

7

Dual input mode

Each ATR401 model is provided with two analogue inputs: it is possible to do mathematic operations
between 2 measured process values, correlating obtained result to the command or alarm outputs, or
to give a process value as remote setpoint. It is also possible to use the controller for 2 independent
control loops.
7.1 Selection of process value related to the command
output and to the alarms
When second analogue input is enabled (par.18
process value to be related to command output, to alarms and to retransmission.
Following options are available:
• : Value read by input AI1;
A. i n. 1
• : Value read by input AI2;
A. i n.2
• : Mean between inputs AI1 and AI2;
mean
• : Difference between inputs: AI1-AI2;
diff.
• : Difference between inputs as absolute value: AI1-AI2;
ab.diF
• Command 1 process must be selected on parameter 36
• Command 2 process must be selected on parameter 55
• The process related to the alarms must be selected on par. 124
for the alarm 2, on par. 160
a.2.pr.
196 for the alarm 5 and on par. 214
a.5.pr.
• The value to be retransmitted must be selected on par. 299
It is possible to choose what to visualize on display 2 selecting par. 278
7.2

Remote setpoint by analogue input

It is possible to enable remote setpoint function setting
PLC OUTPUT
13 14 15 16 17 18 19 20 21 22 23 24
+0
+1
1 2 3 4 5 6 7 8 9 10 12
DP1
PL500 PLE500-6AD
The decimal point setting parameter for the image input (or remote setpoint) is locked and modifies
automatically when the command input decimal point is changed.
7.3

Remote setpoint by serial input

It is possible to enable remote setpoint function selecting
remote setpoint must be written on the word modbus 1249 for the command 1 and 1250 for the
command 2 (with tenth of degree if the command process is a temperature sensor).
It is possible to switch from remote to local sepoint pressing
the led REM is ON (if there is serial communication), it flashes when switching to local setpoint mode.
At restarting the controller keeps set in remote setpoint mode (the setpoint value is initialized to 0).
a.3.pr.
Remote
Setpoint
AI2
C1
C2
ATR244
4...20mA
0...10V
Remote
Setpoint
AI2
C1
C2
ATR244
other than
sen.2
c.Pr. 1
c.Pr.2
for the alarm 3, and on par. 178
for the alarm 6.
a.6.pr.
enab.
OUT
AT R 2 4 4
The command setpoint is read on the
Control loop
second analog input AI2: on par. 55
A1 A2 A3 TUN MAN REM
set
FNC SET
Probe
AI1 by setting
Selecting
possible to switch from remote to local
setpoint pressing
OUT
AT R 2 4 4
The selection is stored even after the
Control loop
subsequent device restarts.
A1 A2 A3 TUN MAN REM
FNC SET
In remote setpoint mode the led
Probe
AI1
ON, it flashes when switching to local
setpoint mode.
en.ser.
SET
) it is possible to choose the
disAb.
for the alarm 1, on par. 142
a. 1 .pr.
for the alarm 4, on par.
a. 4 .pr.
and/or on par. 308
rtm. 1
ui.d.2.
or on par. 56
en.tst.
. The inputs reversal is possible
A. i n.2
on par. 55
A. i n. 1
on par. 56
en.tst.
SET
for 1 second.
or on par. 56
en.se.t.
for 1 second. In remote setpoint mode
rtm.2.
rem.s.
c.pr.2
.
c.pr.2
it is
rem.s.
REM is
The
rem.s.
User manual - ATR244 - 17