Watlow Integrated Controller Rev C EZ-ZONE PM, User Manual

Wa t l o w   E Z - Z O N E

®

  P M   I n t e g r a t e d   C o n t r o l l e r  

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C h a p t e r   9   F e a t u r e s

 Alarm  Silencing

If alarm silencing is on the operator can disable the 
alarm output while the controller is in an alarm 
state. The process value or temperature has to enter 
the normal operating range beyond the hysteresis 
zone to activate the alarm output function again.

An active message, such as an alarm message, 

will cause the display to toggle between the normal 
settings and the active message in the upper display 
and 

 [Attn]

 in the lower display.

Push the Advance Key to display 

[ignr]

 in the 

upper display and the message source in the lower 
display.

Use the Up 

¿

 and Down 

¯

 keys to scroll through 

possible responses, such as Clear 

[`CLr]

 or Silence 

[`SiL]

. Then push the Advance 

‰

 or Infinity 

ˆ

 key 

to execute the action.

See the Keys and Displays chapter and the Home 

Page chapter for more details.

Turn alarm silencing on or off with  Silencing

 [`A;Si]

 (Setup Page, Alarm Menu).

  Alarm  Blocking

Alarm blocking allows a system to warm up after 
it has been started up. With alarm blocking on, an 
alarm is not triggered when the process tempera-
ture is initially lower than the alarm low set point 
or higher than the alarm high set point. The process 
temperature has to enter the normal operating range 
beyond the hysteresis zone to activate the alarm 
function.

If the EZ-ZONE

®

 PM has an output that is func-

tioning as a deviation alarm, the alarm is blocked 
when the set point is changed, until the process value 
re-enters the normal operating range.

Turn alarm blocking on or off with  Blocking

 [`A;bL]

 (Setup Page, Alarm Menu).

  Current  Sensing

Open heater circuit detection

 Current Error  

[`C;Er]

 (Operations Page, Current 

Menu) detects an open load circuit if no current is 
flowing through the current transformer when the 
output is active and the load is supposed to be on.

Shorted heater circuit detection

Current Error detects a shorted load circuit if cur-
rent is flowing through the current transformer 
when the output is inactive and the load is supposed 
to be off.

Set the current detect set points with  High Set 

Point  

[`C;hi]

 and  Low Set Point  

[`C;Lo]

 (Operations 

Page, Current Menu).

View the current level and most recent faults with 

 Read, Current Error  

[`C;Er]

 (Operations Page, Cur-

rent Menu) and  Heater Error  

[`h;Er]

 (Operations 

Page, Current Menu).

Programming the  EZ Key 

You can program the EZ Key either in the Setup 
Menu or with configuration software, such as EZ-
ZONE

®

 Configurator, using a personal computer.

The following examples show how to program the 

EZ Key to start and stop a profile.

Using keys and display:

1.  To go to the Setup Page from the Home Page, 

press both the Up 

¿

 and Down 

¯

 keys for six sec-

onds. 

[``Ai]

 will appear in the upper display and 

[`Set]

 will appear in the lower display.

2.  Press the Up Key 

¿

 until 

[`Fun]

 appears in the 

upper display and 

[`SEt]

 will appear in the lower 

display.

3.  Press the Advance Key 

‰

 until Digital Input Level  

[`leu]

 appears in the lower display. Use an ar-

row key to specify the state of the key (high or low) 
when the controller is powered up. Functions will 
toggle with each press of the EZ Key, such as Pro-
file Start/Stop.

4.  Press the Advance Key 

‰

. The lower display will 

show Digital Function 

[``Fn]

. Press the Up 

¿

 or 

Down 

¯

 key to scroll through the functions that 

can be assigned to the EZ Key

  When Profile Start/Stop 

[P;StS] 

appears in the 

upper display and 

[``Fn]

 appears in the lower 

display, press the Advance Key 

‰

 once to select 

that function and move to the Function Instance 

[``Fi] 

parameter.

5.  Press the Up 

¿

 or Down 

¯

 key to scroll to the 

profile that you want the EZ Key to control.

6.   The instance tells the controller which of the 

numbered functions should be acted upon. For 
profiles, there are 4 instances. Press the Infinity 
Key 

ˆ

 once to return to the submenu, twice to 

return to the main menu or three times to return 
to the Home Page.

 Using the software with Standard Bus:

1.  Make the necessary physical connections between 

the personal computer and the EZ-ZONE

®

 PM. 

Set Protocol (Setup Page, Communications Menu) 
to Standard Bus. Run the software and allow it 
to connect to the controller by directing it or al-
lowing it to find the appropriate communications 
port.

2.  After the software connects to the controller, look 

on the left side of your screen under the Param-
eters Menus for Function Key under Setup. Click 
on the plus sign to reveal the Function Key 1 
submenu.

3.  Click on Function Key 1, then select a Digital In-

put Function and a Function Instance.

If you want to start and stop a profile with the EZ 

Key, select Profile Start/Stop and the number of the 
profile that you want the EZ Key to control.