Watlow PM LEGACY™ Limit Controller  •  34  •  Chapter 3 Keys and Displays
Chapter 3: Keys & Displays
3
PM3/PM6 LEGACY™ Express Limit •   14  •  Keys &  Displays
 Zone Display:
When [2onE]  (found in the 
Factory Page) is set to on, indi-
cates the controller zone.
[1] to [9]  = zones 1 to 9
[A] = zone 10 [E] = zone 14
[b] = zone 11 [F] = zone 15
[C] = zone 12 [h] = zone 16
[d] = zone 13
 Lower Display: 
Indicates the current state of 
the limit [Fail] or [Safe].
Function Key:
Programmable by user 
to activate a function.
RESET Key: 
Press to reset limit after a 
trip condition has been 
cleared.
FN
°
°
O
Z
N
E
1
2
3
4
5
Reset
L
I
ඕ
I
T
 Temperature Units 
Indicator Lights: 
Indicates whether the 
temperature is displayed in 
Fahrenheit or Celsius.
 Output Activity:
Number lights indicates 
activity of outputs 1 and 2. 
  Communications Activity: 
Flashes when another 
device is communicating 
with this controller.
 Upper Display: 
On power up, displays 
the process value, otherwise
displays the value of the 
parameter in the lower 
display.
Up and  Down Keys: 
Changes limit set points 
when displayed. Changes 
menu inside pages. Inside 
menus, changes the selected 
setting in left display
 Keys & Displays 16
th
 DIN LIMIT Controller
‰
Advance Key:
 
Advances through 
menu prompts.
32
nd
 DIN LIMIT Controller
PM3
PM6
8.8.8..8
8.8:8..8
1
256
%
Reset
Left Display: Home at 
beginning displays process 
value (PV). Entering into 
menus displays the value 
or setting of parameter
Right Display: Home at 
beginning displays limit 
status. Displays page 
name when entering 
pages. Entering into 
menus displays the 
parameter name
Advance Key:
Advances through menu 
prompts.
Output Activity: 
Indicates activity 
of outputs 1 & 2, 
dio 5 & 6
Up and Down
Keys:
Changes limit set points 
when displayed. 
Changes menu inside 
pages. Inside menus, 
changes the selected 
setting in left display
Reset Key: 
Reset 
Press to reset limit 
after a trip condition 
has been cleared.