STI DigitalTrak2 - Diagnosis Mode; Alarm; Zero Point of Position Sensor too Low; Span Point of Position Sensor too High

INSTRUCTION MANUAL
DigitalTrak2™
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STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com
Manual 4054 – rev.00 02/2021 – DT2 - 17 -
5.4 Diagnosis Mode
5.4.1 Entering diagnosis mode
In normal mode, press the button A/M and  3 seconds to enter the diagnosis state. Upper line displays the value of
parameter; lower line displays the name of the parameter.
Press the button , the parameter moves forward circularly
Press the button , the parameter moves revise circularly
5.4.2 Exiting diagnosis mode
In the state of diagnosis: Press the button A/M for 3 seconds to exit the diagnosis mode and return to normal mode.
5.4.3 The auto-diagnostic parameter list of valve Positioner
No
Parameters
Display
Meaning
Value/Range
Unit
01
CURR
Input current
4.00~20.00
mA
02
TUP
Travel time up
0~200
S
03
TDW
Travel time down
0~200
S
04
DBUP
Dead band up
0.1~10.0
%
05
DBDW
Dead band down
-0.1~-10.0
%
06
PUP
Prediction up
1~100
%
07
PDW
Prediction down
1~100
%
08
IMUP
Impulse length up
2~200
ms
09
IMDW
Impulse length down
2~200
ms
10
SSUP
Short step zone up
0.1~100.0
%
11
SSDW
Short step zone down
0.1~100.0
%
5.5 Alarm
5.5.1 Zero point of position sensor too low
In sensor angle check mode, if the feedback position value is less the -52.0, LCD displays "DOWN":
Display:
Solution:
Check whether installation of feedback components is accordance with 4.2.2 or 4.2.3 in this manual.
Fine-tune the installation bracket position.
5.5.2 Span point of position sensor too high
In sensor angle check mode, if the feedback position value is greater than 52.0, LCD displays "UP":
Display:
Solution:
Check whether installation of feedback components is accordance with 4.2.2 or 4.2.3 in this manual.
Fine-tune the installation bracket position.
5.5.3 Initialization error
During the positioner tuning, step 1 is error.