Ascon Tecnologic - Y39 Line - Operating Instructions - Pag. 12
6.3 RS 485 Serial Interface by TLCNV
The instrument can be connected by a special cable to the
TLCNV device (mod. C - TTL/RS485 interface), by means of
which it is possible to connect the controller with a network
to which other instruments (controllers or PLC) are con-
nected, all depending typically on a Personal Computer used
as plant supervisor.
Using a Personal Computer it is possible to acquire all the
function information and to program all the instrument con-
figuration parameters.
The software protocol adopted for the instrument is a MOD-
BUS RTU type, widely used in several PLC and supervision
programs available on the market (Y and Z series protocol
manual is available on request).
If the instrument is used with TLCNV program with param-
eter t.Ad the station Address.
Set a different number for each controller from 1 to 255.
Note: The baud-rate is fixed at 9600 baud.
TLCNV interface is directly supplied by the instrument.
Supply
TLCNV
Cable
789
654
ON
TX/RX
TTL
TLCNV
B
D A
RS 485
32 1
For additional info, please consult the TLCNV instruction
manual.
7 PROGRAMMABLE PARAMETERS TABLE
Here below is a description of all the parameters available on the instrument. Some of them may not be present because
depend on the model/type of instrument.
“S.” - Set Point parameters
Parameter Description Range Default
1
S.LS
Minimum Set Point -99.9 ÷ HS -50.0
2
S.HS
Maximum Set Point LS ÷ 999 99.9
3
S.SA
Active Set Point 1 ÷ 2 1
4
SP
Set Point (1) S.LS ÷ S.HS 0.0
5
SP2
Set Point 2 S.LS ÷ S.HS 0.0
“i” - Inputs parameters
Parameter Description Range Default
6
i.SE
Probes Type
Pt PTC;
nt NTC.
nt
7
i.uP
Unit of measurement and resolution
(decimal point)
C0 °C resolution 1°;
F0 °F resolution 1°;
C1 °C resolution 0.1°;
F1 °F resolution 0.1°.
C1
8
i.Ft
Measurement filter oF/20.0 s 2.0
9
i.C1
Pr1 Probe Calibration -30.0 ÷ +30.0°C/°F 0.0
10
i.C2
Pr2 Probe Calibration -30.0 ÷ +30.0°C/°F 0.0
11
i.C3
Pr3 Probe Calibration -30.0 ÷ +30.0°C/°F 0.0
12
i.CU
Measure offset (display) -30.0 ÷ +30.0°C/°F 0.0
13
i.P2
Pr2 input function
oF No function;
EP Evaporator;
Au Aux probe;
dG Digital input
EP
14
i.P3
Pr3 input function dG