Watlow EZ-ZONE PM Express Manuale Utente Scaricare il pdf (Pagina 17)

EZ-ZONE PM Express (PID) • 17 • Keys and Displays

Responding to a Displayed Message

Keys & Displays for 1/8

or 1/4 DIN PID Controllers

PM8

PM9

PM4

An active message will cause the display to toggle

between the normal settings and the active mes-

sage in the upper or left display and [Attn] in the

lower or right display. Your response will depend

on the message and the controller settings. Some

messages, such as Tuning, indicate that a process

is underway. If a message is generated in the

right or lower display that can be cleared (such

as [AL;h1]), simply push the infinity ˆ key to

execute the action ([CLr]).

[AL;L1] Alarm Low 1 (sensor input below low

alarm set point)

[AL;h1] Alarm High 1 (sensor input above high

alarm set point)

[AL;E1] Alarm Error 1 (alarm state cannot be

determined due to lack of sensor input)

[Er;i1] Error Input 1 (sensor is not providing a

valid signal to the control)

[tUn1] Tuning (controller is autotuning the

control loop)

[`rP1] Ramping (controller is ramping to a

new set point)

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Watlow EZ-ZONE PM Express Manuale Utente Pagina 17