Alarms; Process Alarms; Set Points - Watlow EZ-ZONE PM User Manual

To check the firmware revision of your control do one of the following:
1. Cycle power to the control while observing the number in the top display (this momentary
numerical display reflects the current installed firmware version).
2. Navigate to the Factory Page by simultaneously pushing and holding the Advance Key
and the Reset Key
to navigate to the Diagnostic Menu. Once there, push the Advance Key twice where the re-
vision will be shown in the lower display and the upper display will indicate the cur-
rEu
rent firmware revision.
Prior to firmware release 11.0:
1. Push the Reset Key
2. Configure a digital input with the Action Function set to Limit Reset (navigate to the Setup
Page under the Digital I/O Menu).
3. Use a field bus protocol, i.e., Modbus, EtherNet/IP, etc..., where a value of zero would be
written to the associated address (navigate to the Operations Page and look for Clear Limit
under the Limit Menu to find appropriate address).
4. Cycle the power to the controller.
Firmware release 11.0 and above:
1. Push the Reset Key
2. Follow the steps below:
2a. Navigate to the Setup Page and then the Limit Menu
2b. Set Source Function A to the desired device that will reset the limit (Digital I/O or Func -
tion Key)
2c. Define the Source Instance
3. Use a field bus protocol, i.e., Modbus, EtherNet/IP, etc...where a value of zero would be
written to the associated address (navigate to the Operations Page and look for Clear
Limit under the Limit Menu to find appropriate address).
4. Cycle the power to the controller.

Alarms

Alarms are activated when the output level, process value or temperature leaves a defined
range. A user can configure how and when an alarm is triggered, what action it takes and
whether it turns off automatically when the alarm condition is over. Configure alarm outputs
in the Setup Page before setting alarm set points. Alarms do not have to be assigned to an
output. Alarms can be monitored and controlled through the front panel or by using software.

Process Alarms

A process alarm uses one or two absolute set points to define an alarm condition. Select the
type with Type
a. t y

Set Points

The high set point defines the process value or temperature that will trigger a high side
alarm. The low set point defines the temperature that will trigger a low side alarm. View or
change alarm set points with Low Set Point
Alarm Menu).
®
Wat lo w EZ-ZO N E P M L im i t Co n t r o ll er
for approximately 8 seconds and then use the up or down arrow key
RESET
RESET
RESET
(Setup Page, Alarm Menu).
and High Set Point
a. L o
99
• •
(Operations Page,
a. h i
Chapter 8 F e atur e s
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