Nexen ROP 964538 - Manual (Page 9)

9 FORM NO. L-21200-C-0613
M
anual
M
ode
When the RSTC is in manual mode (status display indicates “Man”) the Control Output level is adjusted by turning the
Tension Adjust knob. Rotating the knob clockwise will increase the output level and rotating the knob counter clockwise
will decrease the output level.
Control Output level is indicated by the OUTPUT display (See Figure 7). The bar graph display indicates output level
magnitude on a scale from 0 to 100 %.
JOB SETTINGS ARCHIVES
The ROP can store up to ten different sets of job settings. Each job has a setting for web tension setpoint, taper tension
setpoint, and taper tension delay. These settings are designated Job 1 through Job 10.
S
electing a
J
ob
When the SELECT key is pressed once, the display screen
switches to Job Setup.
1. From this screen, press and hold the SELECT key
to scroll through job numbers.
2. When the desired job number is reached, release
the SELECT key.
l
oading a
J
ob
3. Press and hold the LOAD key to load the param-
eters of the selected job.
After the parameter values have been loaded, the
messaged “Job Loaded” is displayed.
S
aving a
J
ob
4. Press and hold the SAVE key to save the current job
parameters into the ROP’s memory.
After the parameter values have been saved, the mes-
saged “Job Saved” is displayed.
R
etuRn to
S
tatuS
S
cReen
5. Release all keys and after a short delay the display
will return to the RSTC Status screen and the new
job parameter values will be sent to the RSTC.
When power is supplied to the ROP, all the job parameter settings (tension setpoint, taper tension setpoint, and taper
tension delay) that were in use when the ROP power was removed are restored from the RSTC. These job parameter
settings will stay in affect until changed by the operator.
When power to the ROP is removed, all the job parameters (including the ones currently in use and Jobs 1 through 10)
are stored in nonvolatile memory.
OUTPUT ON/OFF
The RSTC’s control signal output can be turned off and on from the ROP by pressing the OUTPUT key. Each time it is
pressed, the present state of the control signal output changes from OFF to ON or ON to OFF. When the control signal
output is on, the OUTPUT display will show the output level from 0 to 100 %. When the control signal output is off, it
will display “OFF.”
ALARMS AND ALARM ACKNOWLEDGE
Anytime the RSTC detects a condition that warrants an alarm, an alarm message will be displayed in place of the bar
graph on the RSTC Status screen. The following alarm messages will remain until the alarm condition has ceased.
Web Break – total loss of web tension.
No Control – control signal output has reached 0% or 100% during automatic operation and web tension is not at set
point. This is usually caused by accelerating a large roll too quickly or a web speed that is too fast near core. Both can
produce a situation where tension is too high and the control output is at 0% and can not decrease any further. A large
roll decelerated too quickly can also cause the output to go to 100% while the web tension remains below setpoint.
High Tension – web tension is greater than the high-tension limit.
Low Tension – web tension is less than the low-tension limit.
Max Output – control signal output has reached maximum output limit, typically 100%.
Min Output – control signal output has reached minimum output limit, typically 0%.
The ALARM key is used to signal to the RSTC that the current alarm has been noticed. Typically the RSTC responds by
turning its alarm outputs off. The alarm message on the ROP screen, however, will remain until conditions change.