15
®
User Instructions Logix 520MD - LGENIM0520-01 11/09
The version number of the embedded code may be checked at any time except during a calibration by holding down the
Δ
button. This will not alter the operation of the unit other than to change the blink sequence to 3 blinks indicating the
major version number. Holding the
∇
button will give the minor version number without affecating operation. The ver-
sion codes are interpreted by adding up the numbers assigned according to the following table:
For example if holding the
Δ
button gave a G-G-R code, and holding the
∇
button gave a Y-Y-G code then the resulting
version number would be (0+0+2).(9+3+0) or version 2.12.
Color
First blink value
Second blink value
Third blink value
Green
0
0
0
Yellow
9
3
1
Red
18
6
2
blink
Code
Description
Recommendations
RGYY
nO MOTiOn TiME OUT ALARM
indicates that during calibration,
there was no motion of the actuator based on the current stroke
time configuration.
Check linkages and air supply to make sure the system is properly connected.
If the time out occurred because the actuator is very large then simply retry the
Quick cal and the positioner will automatically adjust for a larger actuator by
doubling the time allowed for movement. This error may be cleared by briefly
pushing the quick-cal button, which will force the positioner to use the parame-
ters from the last good calibration.
RGRR
FACTORY RESET STATE
indicates the unit has had a factory reset
and has not yet been calibrated. The unit will not respond to
commands and will remain in the failsafe position until a calibrati-
on is successfully completed.
Calibrate. Proper Valvesight operation will require stroke, actuator, and friction
calibration to be completed. This indicator can be disabled.
RYYG
SUPPLY PRESSURE LOW ALARM
(user set) indicates that the
supply pressure is below the user set alarm limit. Low supply
pressure can cause poor valve response or positioner failure.
The minimum recommended supply pressure is 30 PSI (2.1 bar)
for proper operation. The unit will fail at less than approximately
17 PSI (1.2 bars). Low supply pressure indications can also be
caused by pneumatic leak.
Regulate the supply pressure at the positioner above 30 PSI (2.1 bar). Reca-
librate pressure sensors. Ensure system air/gas supply is adequate. Repair
kinked supply tubing. Check the pressure sensor board connections and replace
pressure sensor board if necessary. Check for pneumatic leaks in the actuator
and actuator tubing. See DTM screen: Health Status/Actuator Health.
RRGG
PiLOT RELAY RESPOnSE ALARM
(user set) indicates that the
pilot relay is sticking or extremely slow to respond. This affects
the responsiveness, increases the chance of limit cycling and
excessive air consumption. The pilot relay consists of the driver
module assembly with piezo (I-P relay) which is coupled to
the spool valve. Delayed response can be caused by a partially
clogged piezo or debris, oil, corrosion, or ice on the spool, or low
supply pressure.
Check response of the valve. If OK, adjust Pilot Relay Response limits. Check
the supply pressure. Check the spool for debris, oil, corrosion, ice on the spool.
Clean or replace the spool assembly. Replace the piezo or driver module assem-
bly. Maintain a clean, water-free air/gas supply. See DTM screen: Health Status/
Positioner Health. This indicator can be disabled.
RRGY
FRiCTiOn LOW ALARM
(user set) indicates the friction has
passed below the user set limit. The alarm indicates a more
severe condition than the warning.
Check for a packing leak. Tighten or replace the valve packing. See DTM screen:
Health Status/Valve Health. This indicator can be disabled.
RRGR
FRiCTiOn HigH ALARM
(user set) indicates the valve/actuator
friction has passed the user set limit. The alarm indicates a more
severe condition than the warning. High friction can cause loop
oscillations, poor position control, jerky motion, or valve sticking.
It can be caused by build-up from the process on the stem, trim
or seat, by a failing bearing or guides in the valve and actua-
tor, galling of the trim or stem, excessively tightened packing,
linkages, or other valve/actuator mechanical issues.
Determine if the friction is significantly interfering with the valve control. If not,
consider increasing the friction warning limit. Consider the following to reduce
friction: Stroke the valve to clear off build-up. Clear any external mechanical
obstruction, loosen the packing, clean the stem, repair or replace the actuator.
Highly localized friction or very jerky travel can indicate internal galling. Repair
or replace internal valve components. See DTM screen: Health Status/Valve
Health This indicator can be disabled.
RRYG
PiEZO VOLTAgE ALARM
indicates the portion of the circuit board
that drives the piezo is bad, or piezo valve itself is bad.
If the unit is functioning and controlling replace the piezo, if it does not operate
replace the main circuit board. This indicator can be disabled.
RRYR
PiLOT RELAY POSiTiOn LiMiT ALARM
indicates the pilot relay
(spool) appears to be fixed at a limit and is not responding. This
could be due to low supply pressure, a hall sensor that is out
of calibration, a broken piezo, stuck spool, or a wire connection
problem.
Check for adequate supply pressure. A hall sensor problem may be cleared by
briefly pushing the quick-cal button, which will force the positioner to use the
parameters from the last valid calibration. Check the internal wiring harnesses
for good connections. Check the spool valve for sticking problems. If the
positioner still does not operate replace the piezo, driver module assembly, and/
or spool assembly.
RRRY
ELECTROniCS ERROR OR ALARM
indicates the internal data
was not updated correctly. This may affect the function of the
positioner in various ways or not at all. This can be caused when
intermittent operation occurs when connecting power.
Error may self clear with time. If error persists, cycle power and complete a
Quick-Cal. If the error still persists, Check internal wiring and connectors for
electrical shorts or opens. If no problems are found and alarm persists, replace
the main circuit board.
RRRR
POSiTiOn DEViATiOn ALARM
(user set) indicates the difference
between the command and the actual position has been greater
than the user-set limit for longer than a user-set time.
Review active alarms and warnings to find root causes of this alarm. See DTM
screen: Alerts/Command Deviation. This indicator can be disabled.
13
VERSiOn nUMbER CHECKing
