4
Limit Module Displays and Menu Navigation
Model 101303-50
Limit Module Displays and Menu Navigation
The Watlow® Series SD Limit Controller monitors the Limit sensor and will shut
down output power if the limit controller’s alarm setpoint is exceeded. Upon
power-up the limit sensor’s process temperature is indicated in the upper display.
The alarm setpoint is set by pressing the blue Advance key until “A1.hi” is
displayed in the lower (right) display. The value of the alarm setpoint should be
visible in the upper (left) display. Use the up and down arrows to adjust the alarm
setpoint value. The setpoint is registered about 2 seconds after the last pressing of
either up or down arrow. The limit has been factory preset. See Appendix A for
factory configuration.
Figure 2 Limit module keys and displays
LED 2:
Illuminated when the over-
temperature alarm has been
activated.
Advance Key:
When at the home page, pressing this
key will open the programming menu.
If in other menus, this key selects the
menu choice in the upper display,
scrolls through menu selections, or
will scroll through parameter values in
the lower display.
Infinity/Home Key:
From the home page, pressing once opens
the Pre-run menu; pressing again starts
the profile and opens the Run menu.
If not at the home page, pressing this key
will exit the menu system and return to the
home page.
Up and Down Keys:
Pressing up or down alone
changes the setpoint or
parameter value.
Pressing them
simultaneously for 3 seconds
accesses Setup Page.
Upper Display:
Indicates process
temperature, or
parameter value
when in menus.
Lower Display:
Indicates process setpoint,
or parameter name when
in menus (not on during
normal operation).
Watlow is a registered trademark of Watlow Electric Manufacturing Co.
